Which of the following processes only occurs in eukaryotic mRNA transcript modification and gene expression?A. mRNA, tRNA, and rRNA are transcribed.
B. Transcription can begin as soon as translation has assembled the first few amino acids in the polypeptide.
C. A poly-A tail is added to the 3' end of an mRNA, and a cap is added to the 5' end.
D. RNA polymerase binds to the promoter.

Answers

Answer 1

Answer: C. A poly-A tail is added to the 3' end of an mRNA, and a cap is added to the 5' end.

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Scar tissue is made from ______ tissue. A) granulation B) epithelial C) fibrin D) reticular
Which of the following scenarios is representative of parasitism?a. Tapeworms living in a mammal’s intestinal tract b. Remora fish attaching themselves to sharks c. Birds feeding on insects stirred up by grazing animals d. Birds eating scraps of food from a crocodile’s teeth
C is incorrect help me
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Proteins in the body are formed from twenty amino acids. a. True b. False

Do the results shown in Figure 19.5 prove conclusively that histone modifications are causing reduced Hnf4a gene transcription? Why or why not?Do the results shown in Figure 19.5 prove conclusively that histone modifications are causing reduced Hnf4a gene transcription? Why or why not?
No, because histone modifications do not affect transcription
No, because the results demonstrate only a correlation between altered histone modifications and reduced transcription
Yes, because the observed changes in histone modifications are consistent with reduced transcription.
Yes, because histone modification is the only regulatory mechanism that could affect transcription

Answers

The correct answer for the question that is being presented above is this one: "Yes, because the observed changes in histone modifications are consistent with reduced transcription." The results shown in Figure 19.5 prove conclusively that histone modifications are causing reduced Hnf4a gene transcription because the observed changes in histone modifications are consistent with reduced transcription.

Why is diffusion and osmosis important to the cell

Answers

uses energy to move substances against (up) a concentration gradient or across a partially permeable membrane. In active transport a special transport protein in the cell membrane picks up the useful particle on one side of the membrane. The transport protein then rotates through the membrane and releases the particle on the other side of the membrane. This uses energy from cellular respiration.

Why must cells reproduce?

HELP PLZZ :((

Answers

Answer: Cell division is key to life: from the moment we are first conceived, we are continually changing and growing. In order for our bodies to grow and develop, they must produce new cells—and allow for the death of old cells. Cell division is also an essential component of injury repair.

Explanation: have a good day

Cells must reproduce to provide protection for your body.

Hope this helps; have a great day!

What were early civilizations more likely to fight over

Answers

Early civilisations were most likely to fight over control over limited resources. Because at that time civilisations did not have the capability to travel far for food and water, they had only what they found around them when they settled, but what they found was often already being coveted by another group, so the only option was to fight until one group won out.

Answer:

control of resources

Explanation:

This is a plastid with chlorophyll in plants that photosynthesize.

Answers

Answer:

Chloroplast

Explanation:

Chloroplasts are organelles, small organs of plant cells, and other organisms capable of photosynthesis, such as algae.

They are green in color because of the presence of chlorophyll. It is in chloroplasts that the chemical reactions of photosynthesis occur.

In addition, these structures have DNA, RNA and ribosomes, so they can multiply and synthesize proteins naturally.

Final answer:

A chloroplast is a type of plastid in plants that contains chlorophyll for photosynthesis. This process uses sunlight, carbon dioxide, and water to produce glucose and oxygen. The chlorophyll appears green because it absorbs blue and red wavelengths of light but reflects green.

Explanation:

The plastid with chlorophyll in plants that photosynthesize is called a chloroplast. Chloroplasts are plant cell organelles that contain a green pigment called chlorophyll, which captures the energy of sunlight for photosynthesis. This process involves a series of reactions that use carbon dioxide, water, and light energy to make glucose and oxygen.

Photosynthetic eukaryotes, including plants and some protists, possess these chloroplasts. However, some bacteria also perform photosynthesis, but their chlorophyll is not located in chloroplasts but instead, within the cell itself.

All photosynthetic organisms contain a pigment called chlorophyll a, which humans perceive as green. This is because it absorbs wavelengths from either end of the visible spectrum (blue and red), but not green, which is reflected, making chlorophyll appear green.

Learn more about chloroplasts here:

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Minerals must be _____.

Answers

Minerals must have a definite chemical composition which may differ within specified limits. According to geologists minerals must be:

>naturally occurring-meaning, people did not make it.
>inorganic- means not made by an organism
>solid-not a liquid, not a gas at standard temperature and or pressure
>definite chemical composition- all occurrences have a chemical composition which varies within a specific limited range.
>ordered internal structure- meaning, atoms are arranged in a systematic and repeating pattern.

Answer: Minerals must be homogenous.

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