plzz help

Which describes a promoter?

a. the first part of an operon that regulates where, when, and to what level a gene is
expressed

b. the part of an operon that, if attached by a repressor protein, suppresses the
expression of a gene

c. a cluster of genes that are expressed or repressed as a group

d.an enzyme that helps DNA unzip prior to transcription

Answers

Answer 1

Answer: A

Explanation: email for more help my address is

charlescarey0906(at symbol)g ma il.com

no spaces or caps

Answer 2

Answer:

a :)

Explanation:


Related Questions

A scientist performs a series of mutation screens to look for mutations that reduce ATP production. One of the mutants, compared to a wild-type cell, has reduced levels of ATP and NADH and increased levels of FAD and pyruvate. Which hypothesis best fits these observations?

Answers

The hypothesis that best fits the observation that one of the mutants has reduced levels of ATP and NADH and increased levels of FAD and pyruvate is that the mutation is disrupting the citric acid cycle (Option 3).

What is the citric acid cycle?

The citric acid cycle, also known as the Krebs cycle, is the second step of cellular respiration which is required to generate ATP through the oxidation of pyruvate.

The reduced form of Nicotinamide adenine dinucleotide (NADH) produced during the citric acid cycle is then used in oxidative phosphorylation (the third step of cellular respiration) in order to generate more ATP.

Therefore, with this data, we can see that the citric acid cycle generates the reduced form of Nicotinamide adenine dinucleotide (NADH) and thus increases the production of ATP, thereby a mutation in an enzyme that works in this pathway may also hamper the proportion of ATP.

Complete question:

A scientist performs a series of mutation screens to look for mutations that reduce ATP production. One of the mutants, compared to a wild-type cell, has reduced levels of ATP and NADH and increased levels of FAD and pyruvate. Which hypothesis best fits these observations?

The mutation is disrupting glycolysis.

The mutation is disrupting fermentation.

The mutation is disrupting the citric acid cycle.

The mutation is disrupting the electron transport chain.

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Answer:

For the people to lazy to read that. The answer is c.

Explanation:

the green pigment that traps the energy of sunlight for photosynthesis is

Answers

Answer:

The green pigment that traps the energy of sunlight for photosynthesis is called chlorophyll.

Answer:

chlorophyl

Explanation:

yea i learned this is science last year

I need help for Monday pls

Answers

Answer:

Explanation:

1.foods

2. lemons or any of acidic fruit

3.washing powder

4. arrhenius Acid

5. hydrogen

6. alkali/ base

7. water?

8. alkali

9. hydroxide

unsure about the rest sorry

Answer:

((1))●many __foods__

●__vegetables__

●such as __detergents__

((2))

acids

a) H

H2O

b) hydronium

((3))

bases

a)Hydroxide

Water

separate

b)water

hydrogen

hydroxide

B

1) pH

inverse

a) acidic

b) basic

........ BRAINLIST.....:)

What happens in prophase.

Answers

During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase. ... Cohesin forms rings that hold the sister chromatids together, whereas condensin forms rings that coil the chromosomes into highly compact forms.

Which of the following structures is part of the peripheral nervous system?

*Cranial and spinal nerves
Brain
Spinal cord
None of the above

Answers

Answer:

a. Cranial and spinal nerves

Explanation: is correct

which type of blood vessel drains blood from the glomerulus?

Answers

Answer:

the efferent arteriole

Explanation:

Blood is brought to the glomerulus by the afferent arteriole, and after the filtration process, the blood is carried away from the glomerulus by the efferent arteriole.

the efferent arteriole.

True or false: Tonic contraction of smooth muscle in blood vessels is important in maintaining blood pressure.

Answers

the answer is true
hope this helps
and i hope i’m right lol

True or False: Microbiomes are found only within the body of a host, which may be animal, plant, fungal, or even protist.

Answers

True, microbiomes are found only within the body of a host.

true or false along with natural selection,genetic drift has profoundly affected the evolution of human traits throughout our species history

Answers

Answer:

yes

Explanation:

due to drift / variation human has been able to atttain high and advanced level of intelligence and development

the three steps that are required for dna replication are

Answers

Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment.

The three steps that are required for DNA  replication are initiation, elongation and termination.

What is DNA replication ?

The process in which DNA of a cell under go duplication to produce two copies during S-phase of cell cycle called as DNA replication.

It involves 3 steps such as initiation step where the origin of replication of DNA molecule undergo unwinding into two DNA strands.

An incomplete unzipping by forming replication fork is created is catalyzed by the helicase enzyme.

Secondly in elongation step the DNA polymerase enzymes make the complementary sequence against each parent template strand.  

It is an unidirectional, one strand which is synthesized in a continuous manner called leading strand, the strand which is synthesized in a discontinuous manner called lagging strand with Okazaki fragments.

Termination occurs in the last step, when the parent molecule has been completely replicated.

Learn more about DNA replication, here:

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how are humans responsible for environmental pollution​

Answers

Answer:

Humans are responsible for the environmental pollution in many ways . Some of the points are as follows :

1 ) People throw the wastes wherever they like instead of using dustbins .

2 ) The various types of gases from the industries which harms the nature .

3 ) Cutting off the trees . ( people can cut but also must plant a new one )

4 ) Farmers using different chemical substances in high amount in the crops .

5 ) Burning plastics , tires etc .

This was my way to answer the question , if you need then you can write in paragraph .

let me know if its incorrect . :-)

what is the purpose of a broth in a microbiology laboratory

Answers

In microbiology laboratory, broth is very vital. Its purpose is to provide growth medium for the available bacteria necessary for working on the nutrients. Broth gives steady and constant nutrients for the bacteria to quickly reproduce. It is normally a clear liquid made from bones, meat or vegetables.

Which statement correctly describes mitotic cell division?​

Answers

Answer:

Explanation:

“Although part of your question is missing, you might be referring to this full question:

Which of the following correctly describes how mitosis and meiosis are similar?

A. Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis.

B. Crossing over occurs between homologous chromatids during both mitosis and meiosis.

C. Both mitosis and meiosis produce diploid daughter cells.

D. Both mitosis and meiosis produce genetically identical daughter cells.”

The statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”.  

Mitosis and Meiosis both are classified under cell division that tends to take place in humans and certain other animals. Both Mitosis and Meiosis have both differences and similarities in the way they result in new cells with varying goals and slightly different outcomes. Some of the similarities between meiosis and mitosis are:

During both mitosis and meiosis, cells must duplicate their DNA and pull them apart into 2 sets and further place the sets on each end of itself and then divide down the middle part

Both meiosis and mitosis results in fresh new cells depending on the genes of their parent cells  

Thus, we can conclude that the statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”. Hence, option A is the correct answer.

Use examples to explain how the geosphere interacts with two other of Earth's spheres. Explain the interaction for each using complete sentences. HELPPPP

Answers

Several examples of sphere interactions can be inferred from this photograph: Humans (biosphere) built a dam out of rock materials (geosphere). Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (geosphere), or evaporating into the air (atmosphere).

(PLEASE MARK ME AS BRINLIEST)

Answer: Dont have one just wanted to help this person get brainliest

Explanation: I like helping

which lipid composition option has the least membrane fluidity?

Answers

Answer:

I think it would be saturated fatty acids

explain one weakness of using the human nervous system to explain human behaviour

Answers

Your nervous system guides almost everything you do, think, say or feel. It controls complicated processes like movement, thought and memory. It also plays an essential role in the things your body does without thinking, such as breathing, blushing and blinking.

Before fossil fuel use became widespread, which of the following did people use for a. energy?
b. wind
c. water
d. animals
e. all of these

Answers

Answer: im not 100% but i think its E all

Explanation:

active transport moves mineral ions into root hair cells through cell membrane proteins. Explain how protein molecules move ions across a membrane during this process. (3marks)

Answers

Explanation:

Small and nonpolar (hydrophobic) molecules can freely pass through the membrane, but charged ions and large molecules such as proteins and sugars are barred passage.

Nonpolar and small polar molecules can pass through the cell membrane, so they diffuse across it in response to concentration gradients.

The ____________ receives the filtrate from the DCTs of several nephrons and funnels it toward the ____________ .

Answers

Answer:

collecting duct, renal pyramid

Explanation:

The collecting duct receives the filtrate from the DCTs of several nephrons and funnels it toward the renal pyramid.

What controls basic functions such as breathing, heart rate, and pulse?


A.cell body

B.spinal cord

C.frontal lobe

D.brain stem

Answers

The brain stem sits beneath your cerebrum in front of your cerebellum. It connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate and blood pressure.

Answer: brain stem

Out in the distance you see an oak tree

Answers

Answer:The rabbit is the primary consumer.

Explanation:



Which of the following is a reasonable claim the researchers can make based on the data in the graphs?

Answers

Answer:

First give the options we can't tell random ir may be wrong give options because in question it is asking which of the following if we say any randomly it becomes wrong.

Without land regulations to protect rainforests, and continues to be destroyed using slash and burn methods Which environmental impact of rainforest deforestation makes rainforest species less resilient to
change?
Increased fire and drought
Increased pollution
Displaced inbes
Habitat fragmentation

Answers

Answer:

Increased pollution is your answer!

Explanation:

Increased pollution is your answer because:

1. ⇒ Burning of mostly anything creats, and all the materials in the forest are one of those materials that will create smoke. And smoke is made out of carbon dioxide, and other poisonous gases that are very bad for our atmosphere.

2. ⇒ The damage from the fire will also cause a lot of damage to the trees and plants. That is very bad because trees are very important for our environment, in their leaves, they have a chemical called chlorophyll, this chlorophyll absorbs sunlight and turns it into oxygen. Not only sunlight is needed, there is also, water, nutrients needed.

I hope I could help you today! Thanks!

Have a great day studying!

What are organic reservoirs meaning.

Answers

The carbon cycle and carbon reservoirs
Most of Earth's carbon is found in inorganic reservoirs such as rocks, water, and sediments. Only a small portion is stored in organic reservoirs, such as in the bodies of living organisms. ... Carbon cycles on land via weathering, runoff, sedimentation, and soil accumulation.

What does insulator mean

Answers

As insulator is a material that doesn't transmit energy easily

what factors are examined by the field of demography? check all that apply.

Answers

Answer:

Demography is the statistical study of human populations. Demography examines the size, structure, and movements of populations over space and time. It uses methods from history, economics, anthropology, sociology, and other fields.

Nearly all forests in ________ have been cut at least once during the past 300 years, so very little original (virgin) forest remains.

Answers

Answer:

In the United States.

Explanation:

It doesn't have very many original forests because people have been chopping them down and planting new ones.

what is the answer tho just asking?

Answers

Answer:

I don't see any thing lol

receptors for neurotransmitters are of primary functional importance in assuring one-way synaptic transmission because they are mostly found on the _____.

Answers

Answer:

The axonal membrane (place as brainliest so others know its correct)

Receptors for neurotransmitters are of primary functional importance in assuring one-way synaptic transmission because they are mostly found on the Axonal membrane.

What are Neurotransmitters?

Neurotransmitters may be defined as the type of chemical substances that are correspondingly liberated at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction. They are released in the location known as the synaptic cleft.

The receptors of these neurotransmitters are present in the plasma membrane of postsynaptic cells which selectively bind the transmitter. They are integral membrane glycoproteins with multiple transmembrane segments.

Some examples of neurotransmitters may include serotonin, GABA, dopamine, acetylcholine, etc.

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What does a ribosome do.

Answers

The ribosome reads the sequence of the messenger RNA (mRNA) and, using the genetic code, translates the sequence of RNA bases into a sequence of amino acids.
A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell. The ribosome reads the sequence of the messenger RNA (mRNA) and, using the genetic code, translates the sequence of RNA bases into a sequence of amino acids.
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