Which of the following enzymes does HIV use to synthesize DNA on an RNA template?
O RNA polymerase
O DNA convertase
O ligase
O reverse transcriptase
The correct choice is option 4. HIV use reverse transcriptase to synthesize DNA on an RNA template.
A vital early stage in the virus life cycle is the transcription of the viral RNA genome.
It is transcribed into double-stranded DNA in affected host cells, which is catalyzed by the HIV type 1 reverse transcriptase (RT) enzyme.
Two similar subunits, p66 and p51, combine to form the asymmetric heterodimer known as the HIV-1 RT.
Two copies of a single-stranded RNA genome are also present in the HIV-1 virion along with the viral proteins.
A DNA polymerase that can duplicate either a DNA or an RNA template, and an RNase H that only cleaves RNA when it is a component of an RNA/DNA duplex, are the two enzymes that make up RT.
To transform the RNA into double-stranded linear DNA, RT's two enzymatic activities, polymerase and RNase H, work together.
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Which of these is a downside of natural gas?
A. It is considered safe to use in homes.
B. It burns more cleanly than other fossil fuels.
C. Scientists have developed new ways of extracting it.
D. Extraction through fracking can contaminate groundwater.
Answer:
D is the answer
Explanation:
No need I just know it.
HELP!!!!!!!!!!LIMITED TIME!!!!!!!!!!!!
In studying phylogenetic trees, what is the name of a group of
organisms used as a reference group for determining the
relationships between three or more groups of organisms?
Select one:
Monophyletic group
Outgroup
Sister group
Ingroup
Answer:
Outgroup
Explanation:
The name of a group of organisms used as a reference group for determining the relationships between three or more groups of organisms in studying phylogenetic trees is an outgroup.
This stage of cellular respiration is responsible for most of the ATP synthesis.
a oxidation phosphorylation
b Glycolysis
c Pyruvate Oxidation
d Citric Acid Cycle
a. Oxidation phosphorylation (also known as the electron transport chain) is responsible for most of the ATP synthesis during cellular respiration.
which of the following releases spores into water? (select all that apply)
A. banana
B. radish
C. seaweed
D. onion
E. lemon
Seaweed is what comes next and disperses spores into the ocean.
How Does White Rust Spread on Radish?When mature, the pustule's epidermis bursts, releasing powdery white spores that are dispersed to nearby plants by the wind or by splashing water. Root veggies like carrots contain 86–95 percent water. Water is absorbed by the carrot by osmosis when it is submerged in water.
Produce pods radishes?In actuality, they are the flowering and seed-producing seed pods of a radish plant. Despite the fact that all radish types will yield pods, some, like the rattail radish (obviously not named with marketability in mind), are produced particularly for the pods.
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HI i would like some help asap
Answer: methionine, arginine, threonine
Explanation:
You are in the year where the earth has no more land available for houses you decide to build an apartment up and need things to survive in each earths 5 layers (troposphere,stratosphere, mesosphere, thermosphere, exosphere) Question: what things would you need to survive the thermosphere(really hot it is 2000 degrees fahrenheit)
The things that you are required in order to survive the thermosphere may include heavy clothes, food, water, oxygen, heating absorbing artificial components, freeze, cold apparatus, etc.
What is Survival?Survival may be characterized as the act or fact of living or continuing longer than another person or thing. It is a struggle to avoid physical extermination and focus on ideal fitness as well as reproduction.
If you have to live in the thermosphere where the temperature is of the utmost high, you would be very cold because there aren’t enough gas molecules to transfer the heat to you. This also means there aren’t enough molecules for sound waves to travel through.
Therefore, the things that you are required in order to survive the thermosphere may include heavy clothes, food, water, oxygen, heating absorbing artificial components, freeze, cold apparatus, etc.
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Why is it helpful to study embryonic structures when determining
evolutionary relationships?
Select one:
All animals look the same as embryos.
All animals have completely different embryonic structures.
Embryos are not used to assign evolutionary relationships; only
adult organisms.
Animals with a shared ancestor may have similar characteristics
as embryos that disappear as adults.
Answer:
Embryology is important to understanding a species' evolution, since some homologous structures can be seen only in embryo development. For example, all vertebrate embryos, from humans to chickens to fish, have a tail during early development, even if that tail does not appear in the fully developed organism.
Explanation:
6. In which location does water reside the longest? How long does it reside there
Vostok, Antarctica
Explanation:
ice cap
You're outdoors and
you notice that your
skin feels a little "moist
& sticky." Which
instrument would give
you information based
on your experience?
A hygrometer would give you information based on your experience of feeling "moist & sticky" outdoors. A hygrometer is an instrument that measures the amount of moisture or humidity in the air, also know as relative humidity. The relative humidity is a measure of the amount of moisture in the air compared to the maximum amount the air could hold at a specific temperature. So if the air is hot and humid, it will make the skin feel "moist & sticky" and a hygrometer will indicate high relative humidity.
A hygrometer would provide you with information based on your experience of feeling "wet & sticky" outside.
what is hygrometer ?
A hygrometer is a device that measures the quantity of water vapour in the air, soil, or restricted places. Humidity metres often rely on measurements of other factors such as temperature, pressure, mass, or a mechanical or electrical change in a substance when moisture is absorbed. These measurable values can be used to calculate humidity using calibration and computation. To monitor humidity variations, modern electronic devices employ the temperature of condensation (called the dew point) or changes in electrical capacitance or resistance. Leonardo da Vinci constructed a primitive hygrometer in 1480. During the 1600s, major advances were made; Francesco Folli constructed a more practical version of the apparatus.
A hygrometer would provide you with information based on your experience of feeling "wet & sticky" outside. A hygrometer is a device that measures the quantity of moisture or humidity in the air, often known as relative humidity. The relative humidity is a measurement of the quantity of moisture in the air in comparison to the maximum amount the air may contain at a given temperature. If the air is hot and humid, the skin will feel "wet and sticky," and a hygrometer will show high relative humidity.
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The test report above shows the level of molecules in different parts of the patients body.What does this test indicate about how her body systems are working
This test indicate that her digestive system is not combining molecules together.
What is body systems?
Body systems as groups of organs and tissues that work together to perform important jobs for the body. There are some organs in our body which are part of more than one body system as they serve more than one function.
The nine major organ systems in the human body are the integumentary system are:
Musculoskeletal system Respiratory system Circulatory system Digestive system Excretory system Nervous system Endocrine system Reproductive systemTherefore, this test indicate that her digestive system is not combining molecules together. Her body systems are working properly
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Alexis wishes to test the impacts of Chemical X on the survival of a local beetle species. He believes the chemical may be related to the disappearance of beetles in the environment. He designs an experiment where the beetles will be exposed to Chemical X in their food. One group of beetles receives food with no Chemical X added. One group of beetles receives the chemical at breakfast only. The last group of beetles receives the chemical at three feedings per day. Which group is the "control"? Group of answer choices
The control group is the group of beetles that receives food with no chemical X added.
What is control group?An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy or likelihood of something previously untried.
A control group in an experiment is a group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the test.
According to this question, Alexis wishes to test the impacts of chemical X on the survival of a local beetle species. He believes the chemical may be related to the disappearance of beetles in the environment.
He designs an experiment where the beetles will be exposed to Chemical X in their food. This suggests that the food that receives no chemical X is the control group of the experiment.
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Natural selection is a mechanism that acts on individuals within a
population. Which is a result of the process of natural selection?
Select one:
Adverse changes to the environment become more frequent.
Genetic similarity within the population increases.
The reproductive rate of the population decreases.
The population as a whole is better adapted to the environment.
Answer:
The population as a whole is better adapted to the environment.
The tiny space between the axon of one neuron and the dendrite or cell body of another is called the a. axon terminal. b. branching fiber. c. synaptic gap. d. threshold.
The tiny space between the axon of one neuron and the dendrite or cell body of another is called the synaptic gap . Correct option (c).
A synapse is a structure in the nervous system that allows a neuron (or nerve cell) to send an electrical or chemical signal to another neuron or the target effector cell.
Synapses are necessary for the transfer of nerve impulses from one neuron to the next. Neurons are specialized in sending messages to specific target cells, and synapses are the method by which they do so. The plasma membrane of the signal-passing neuron (the presynaptic neuron) comes into intimate contact with the membrane of the target (postsynaptic) cell at a synapse.
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"In one catalytic cycle, the Na+/K+ ATPase transporter transports:
A) 2 Na+ out, 3 K+ in, and converts 1 ATP to ADP + Pi.
B) 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
C) 3 Na+ in, 2 K+ out, and converts 1 ATP to ADP + Pi.
D) 1 Na+ out, 1 K+ in, and converts 1 ATP to ADP + Pi.
E) 2 Na+ out, 3 K+ in, and converts 1 ADP + Pi to ATP."
In one catalytic cycle, the Na+/K+ ATPase transporter transports: 3 Na+ out, 2 K+ in, and converts 1 ATP to ADP + Pi.
The sodium/potassium ATPase (Na+/K+-ATPase) antiporter is an example of active transport. This active transport pump is located in the plasma membrane of all cells. Keep intracellular Na+ low and intracellular K+ high.
Na+/K+-ATPase (NKA) is a ubiquitous enzyme composed of α, β, and γ subunits that converts 3 Na+ outwards and 2 K+ inwards, thus facilitating cell membrane involved in creating and maintaining Na+ and K+ gradients across cell.
The sodium-potassium pump is an example of active transport because energy is required to move sodium and potassium ions up the concentration gradient. It transports two potassium ions into cells with high potassium levels and pumps three sodium ions out of the cell into the extracellular fluid.
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Four of the five answers listed below assist in chromosome movement. Select the exception.
a. Kinetochores
b. Centromeres
c. Centriole
d. Spindle microtubule
e. Nuclear envelope
Nuclear envelope is the exception assist in chromosome movement.
The correct option is E.
A chromosome is a lengthy DNA molecule that houses all or portion of an organism's genetic code. When coupled with chaperone proteins, histones adhere to and compress the DNA molecule, shielding it from damage. Histone proteins make up the majority of eukaryotic chromosomes. The unusual three-dimensional structure of these chromosomes is crucial for regulating transcription. In eukaryotic cells, the cytoplasm and the nucleus are separated by a carefully regulated membrane barrier called the nuclear envelope (NE). It is made up of a variety of proteins that have been connected to gene regulation and chromatin organisation.
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If you want a molecule that is highly polar, look for one that contains:Term
If you want a highly polar molecule, look for one that contains polar covalent bonds or polarizable groups such as N-H, O-H, F-H, and C=O. Additionally, asymmetry in the distribution of electrons in a molecule can also make it polar.
A polar molecule is one that has a positive and negative end, also known as a dipole.
The polarity of a molecule depends on the difference in electronegativity between the atoms making up the molecule. When two atoms have different electronegativities, the shared electrons will be pulled closer to the atom with the higher electronegativity, creating a partial positive charge on the other atom.
This creates a dipole moment and makes the molecule polar. To identify a highly polar molecule, look for polar covalent bonds or polarizable groups such as N-H, O-H, F-H, and C=O. Additionally, asymmetry in the distribution of electrons in a molecule can also make it polar.
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Which of the following does NOT store potential energy that is usable by a ce ATP Protons pumped into the intermembrane space NADH CO2
The substance carbon dioxide (CO2) does not store potential energy that can be used by a cell.
Can a cell use the potential energy that NADH stores?When energy is generated during oxidation reactions, cells do not immediately put it to use. Instead, they break it down into small, energy-dense molecules like ATP and nicotinamide adenine dinucleotide (NADH), which may be used all across the cell to fuel metabolism and create new cellular components.
Can a cell use the potential energy that ATP stores?Energy used and stored by cells is derived from the adenosine triphosphate (ATP). Adenine, a ribose sugar, and three serially linked phosphate groups make up the nucleoside triphosphate (nucleoside) structure of ATP.
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Which describes one thing that happens during thermoregulation when a sensor recognizes that a person's temperature is 35 degrees Celsius?
A. Hair on the body lies flat against the skin.
B. Blood vessels under the skin expand.
C. Sweat glands are turned on.
D. Muscles under the skin make body hair stand on end.
Thermoregulation: D. Muscles under the skin make body hair stand on end.
Why hairs of skin stand during thermoregulation?Thermoregulation means maintaining constant body temperature of 37 degrees Celsius. Through a number of physical mechanisms, the human body keeps its temperature at roughly 98.6°F (37°C). Shivering to increase body temperature, sweating to decrease it, and constricting or relaxing blood vessels to change blood flow are a few examples. An individual may overheat and develop hyperthermia if they are unable to control their body temperature. The inverse is also true: Hypothermia will result if the core temperature drops below a safe level. Both ailments have the potential to be fatal.
The skin's hairs aid in controlling body temperature. Each hair's erector muscle makes them stand straight when they're cold. Insulates by trapping a layer of warm air close to the skin.
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A basketball has a mass of 1.5 kg and is traveling at a rate of 10 m/s. What is the basketball's momentum?
The basketball's speed is calculated as 3.1 kg-m/s – 0.60 kg = 5.17 m/s if its momentum is 3.1 kg-m/s.
In physics, what is a momentum?
Momentum is characterised as the intensity of a body's motion.As momentum depends on both velocity and the orientation of the body's motion, it is quantified by "mass velocity". Since movement is a vector and mass is a scalar, momentum is a vector.
What does the word "momentum" mean?
Momentum can be viewed as a body's "power" while it is moving, or the amount of force it can exert on another body. For instance, a fastball (small mass) thrown quickly can have the same speed as a bowling ball (big mass) going extremely slowly (low velocity) (high velocity).
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Scientists take scientific measurements carefully in order to ensure their reliability and validity. What is the difference between accuracy and precision in scientific measurements?
a.
Accuracy is how far out the measurement is taken, while precision is how close a measured value is to its true value.
b.
Accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other.
c.
Accuracy is how close a measured value is to its true value, while precision is how close the average value is to the true value.
d.
Accuracy and precision are two different words for the same thing.
The difference between accuracy and precision in scientific measurements is as follows: Accuracy is how close a measured value is to its true value, while precision is how close measured values are to each other (option B).
What is accuracy and precision?Accuracy is the exact conformity to truth, or to a rule or model i.e. the degree of conformity of a measure to a true or standard value.
On the other hand, precision is the ability of a measurement to be reproduced consistently.
Accuracy and precision are two measures of observational error. Accuracy is how close a given set of measurements are to their true or standard value, while precision is how close the measurements are to each other.
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Which of the following quotes best explains why Carson chose the title "Silent Spring" for her book?
"On the mornings that had once throbbed with the dawn chorus of robins, catbirds, doves,
Ojays, wrens, and scores of other bird voices there was now no sound; only silence layover the
fields and woods and marsh."
"Along the roads, laurel, viburnum, and alder, great ferns and wildflowers delighted the
traveler's eye through much of the year."
"So it had been from the days many years ago when the first settlers raised their houses,
sank their wells, and built their barns."
"Then a strange blight crept over the area and everything began to change. Some evil spell
Ohad settled on the community: mysterious maladies swept the flocks of chickens; the cattle
and sheep sickened and died."
The title of Silent Spring, which conjures up a deteriorated environment, was inspired by the line from John Keats' poem "La Belle Dame sans Merci," "the sedge is wither'd off the lake, / And no birds sing."
What is meant by degraded environment?The term "environmental degradation" refers to the deterioration of the environment caused by the depletion of resources such as the quality of the air, water, and soil; the destruction of ecosystems; the destruction of habitats; the extinction of wildlife; and pollution. The term "environmental degradation" refers to the deterioration of the environment's quality as a result of natural disasters, poor land use, ambient pollution concentrations, and other processes and activities. Among the most common sources of water pollution include sewage from both public and private sources, pesticides, fertilizers, plankton blooms, silt, oils, chemical traces, radioactive substances, and others. These have a terrible detrimental influence on the water and can lead to varied levels of degradation.To learn more about degraded environment, refer to:
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For which amino acid sequence does the RNA sequence UUUCCUCAA code?
1. leu-thr-glu
2. phe-pro-his
3. phe-pro-gln
4. ser-his-gln
Answer:
3
if you translate the mRNA to amino acids using a chart or memorization, you can see it's 3
Answer:
3. phe-pro-gin
Explanation:
Because the ammino acid chart goes down from row from row
What qualitative effect would you expect each of the following to have on the P50 of hemoglobin?
- decrease in pH from 7.3 to 7.0
- decrease in pCO2 from 50 to 30 mm Hg
- removal of all BPG
A decrease in pH from 7.3 to 7.0 would increase P50, a decrease in pCO2 from 50 to 30 mm Hg would decrease P50, and the removal of all BPG would decrease P50 of hemoglobin.
A decrease in pH from 7.3 to 7.0 would have an increase in the P50 of hemoglobin. This is because a decrease in pH causes a shift in the equilibrium of the hemoglobin-oxygen binding reaction towards the left, meaning that hemoglobin will release more oxygen at a given partial pressure of oxygen.
A decrease in pCO2 from 50 to 30 mm Hg would have a decrease in the P50 of hemoglobin. This is because an increase in the partial pressure of carbon dioxide causes a shift in the equilibrium of the hemoglobin-carbon dioxide binding reaction towards the right, meaning that hemoglobin will bind more carbon dioxide at a given partial pressure of carbon dioxide.
Removal of all BPG (bisphosphoglycerate) would have a decrease in the P50 of hemoglobin. This is because BPG is a molecule that binds to the hemoglobin molecule and stabilizes the deoxyhemoglobin form. Without BPG, the hemoglobin will be less stable in the deoxyhemoglobin form and will release oxygen more readily at a lower partial pressure of oxygen.
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Look at the graphic JPG List and describe 3 methods of jellyfish movement
4. What do you think people can do to help speed up the process of lowering global greenhouse gas emissions ?
Diffusion of a substance across the cell membrane may be influenced by all of the following except
O its charge of the substance. O its concentration gradient.
O its lipid solubility. O the availability of ATP. O the presence of membrane channels for the substance.
Diffusion of a substance across the cell membrane may not be influenced by the availability of ATP.
Moving molecules along a concentration gradient is referred to as diffusion. Each and every living thing goes through this crucial phase. The flow of materials into and out of cells is aided by diffusion.
The most fundamental way for molecules to cross the plasma membrane is through passive diffusion.Simply said, a molecule diffuses through the phospholipid bilayer during passive diffusion, dissolves in the aqueous solution on the other side of the membrane, and then diffuses back through the bilayer.
When molecules are moving over concentration gradients in cells, some can do so directly across the lipid section of the membrane, while others must go through membrane proteins, which is a process known as facilitated diffusion.
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Approximately what percentage of human DNA is noncoding? O 99.9% O 37% O 49% O 79% O 97%
Approximately 99.9 percentage of human DNA is noncoding
Noncoding DNA sequences are parts of an organism's DNA that do not encode protein sequences, according to the fields of genomics and allied sciences. While some non-coding DNA is not transcribed or gives rise to RNA transcripts with uncertain functions, some non-coding DNA is transcribed into functional non-coding RNA molecules (such as transfer RNA, ribosomal RNA, and regulatory RNAs).
Species differ substantially in the quantity of non-coding DNA they contain. Since a significant fraction of noncoding DNA at first had no recognised biological purpose, it was occasionally referred to as "junk DNA," especially in the lay press.
The transcriptional and translational control of protein-coding sequences, DNA replication origins, centromeres, telomeres, scaffold attachment regions (SARs), genes for functional RNAs, and many other types of non-coding DNA sequences all play crucial roles in biology.
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T F
Fur color can help prevent an
animal from being eaten.
It is true that an animal's fur colour can assist save it from being eaten.
Organisms utilise camouflage, also known as cryptic colouring, as a form of defence or strategy to conceal their appearance, often to blend in with their environment. To conceal their location, identity, and movement, organisms utilise camouflage. Predators can sneak up on prey while prey may evade predators thanks to this.
Protective coloration refers to the distinctive hues or markings that some animals exhibit. Animals with these marks are shielded from predators or potential mealtime companions. Certain animal marks function as a form of camouflage, allowing the animal to fit in with its environment.
The majority of birds and animals, including owls, deer, coyotes, rats, and rabbits, are some shade of brown or grey, which enables them to virtually disappear when they are not moving. The skin pigment cells (chromatophores) of chameleons and a variety of fish may instantly change their environment' hue.
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Which of the following attributes does a line have?
Answer: It is stragiht the emilys back
Explanation: because