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sukhopar [10]
3 years ago
9

Which of the following statements about the smooth endoplasmic reticulum is/are correct?

Biology
1 answer:
Vlada [557]3 years ago
8 0

Answer:

  • Liver cells are abundant in SER.  
  • The testes and ovaries are tissue types whose cells are abundant in SER.
  • Cholesterol is made in the SER.
  •  Phospholipids are synthesized from cytosolic water soluble precursor molecules.  

Explanation:

This is because liver cells contain enzymes that metabolize various lipid-soluble compounds.

This is because testes and ovaries produce steroid hormones (cholesterol is the precursor for their synthesis).

ER is the organelle at which all membrane lipids are synthesized.

Phospholipids are the main lipids that are the main structural components of the cell membrane. They are synthesized on the cytosolic side of the ER membrane, from water-soluble cytosolic precursors.

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Which statement most accurately explains how allosteric regulation can change an enzyme's catalytic activity? View Available Hin
Digiron [165]

Answer:

In allosteric inhibition, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate.

Explanation:

Allosteric regulation of an enzyme can be positive or negative, but it always involves effector molecules that bind to non-active site of the enzyme and change its conformation. That site of binding is called allosteric or regulatory site. If the enzyme activity is enhanced effector molecule is called allosteric activator but if the activity is decreased effector molecules are allosteric inhibitors.

5 0
3 years ago
is the effort to understand the natural world and how the natural world works. uses ______________________ as the basis of under
guajiro [1.7K]

Answer:

I believe the answer to this question is b observable physical evidence.

Explanation:

The reason for this is because scientists make predictions and use evidence to back up their hypothesis. If the evidence doesn't support their claim, they make up a new one, until they have gathered enough evidence to support their claim. This can be done through past knowledge, like failures and successes and lab experiments, so it is not only each of them, so the answer cannot be c or d. Out of the two options, a and b, I just thought about it and picked b as the reasonable answer. Please give me feedback on the answer, if it is right or not. Thanks! Hope I helped!

3 0
3 years ago
7. In the pocket mice investigation, what patterns in the data did you observe? Does the pattern in the
Korvikt [17]

Dark fur color appears to be an adaptation for mice living in dark environments, as both the frequency of the characteristic and the allele that generates it have altered. These findings further back with the theory that selection is context-dependent, as dark mice were preferred in some contexts but not in others.

<h3>What is mutation?</h3>

A mutation is defined as a change in the sequence of genetic letters, called bases, within a molecule of DNA.

In a population, more offspring are born than can survive, resulting in competition among people. Individuals that possess a certain trait are more likely to live and/or produce more offspring than those who do not possess that trait. The context in which a species exists influences its selection. Characteristics that are advantageous in one setting may be detrimental in another.

New mutations cause black color.

  1. Fur color is controlled by many genes (4:29).
  2. Most genes are identical, but dark and light rock
  3. pocket mice differ in one gene (Mc1r; 4:55).

For more information regarding mutations, visit:

brainly.com/question/17031191

#SPJ1

8 0
2 years ago
Which of the following is a reason that Venus is not ideal for supporting life?
Kryger [21]

Answer:

Venus is not ideal for supporting life because it has a thick atmosphere which causes extremely high temperatures.

Explanation:

  • Venus is the second planet near to the sun in solar system.
  • It is called the twin of Earth because of its almot similar size.
  • It completes one revolution in 225 days.
  • It is the hottest planet on in the solar system having temperature near 735 K which is more than mercury, the nearest planet to the sun.
  • The high temperatures of Venus results from its extremely dense and Carbon dioxide rich atmosphere. The atmosphere is surrounded by thick clouds of sulphuric acid that cause sulphuric acid rains.
  • It is known as evening star.

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3 years ago
George uses crayons to draw a model of the solar system on a sheet of paper. What is a limitation of this model?
dimaraw [331]
The answer is a because he can not get the correct order cause of the sun
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