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Art [367]
4 years ago
7

One of the questions early geneticists had to answer was how only four nucleotides can specify placement of 20 amino acids in pr

oteins. Today we know that ________, a sequence of three adjacent nucleotides, determine the insertion of a specific amino acid in a polypeptide chain.
Biology
1 answer:
jenyasd209 [6]4 years ago
6 0

Answer:

<h2>Codon </h2>

Explanation:

The sequence of DNA is transcribed into mRNA, containing the sequence  for protein synthesis, protein is synthesized according to the codons in mRNA.  This sequence of nucleotide on DNA/ RNA is divided into a series of three nucleotide units, and one unit of three nucleotide is  known as codons.

There are overall 64 codons, 61 codons out of 64 codons, codes for overall 20  amino acids, and the remaining three  are stop codons.

These there codon do not code for any amino acid.

And these 61 codons, they  code for total 20 amino acids. So one amino acid can be coded by one or more than one codons.

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In what way is surface area more important for cells than volume?
Virty [35]

Answer:

As a cell grows in size, the surface area gets bigger, but the volume gets bigger faster. Thinking about this as a ratio (division), the volume is the denominator and the surface area is the numerator. If the volume is getting very big, then the ratio itself will be getting very small.

4 0
3 years ago
Mitosis can best be described as what?
cricket20 [7]

Hello!

Your answer is A. The daughter cells are genetically identical to both each other and to the parent cell.

The parent cell makes two copies of its chromosomes and separates them, then divides by cytokinesis, creating two genetically identical daughter cells.

5 0
3 years ago
Read 2 more answers
Using at least 3 steps explain how to make a wet mount slide with an Elodea plant​
Masja [62]
Step One - Obtain a clean microscope slide.

Step Two - Place a drop of liquid on the slide. This is the “wet” part of the wet mount. The liquid used depends on the type of cell being viewed:
If examining a plant cell, tap water can be used.
If examining an animal cell, physiological saline (or contact lens solution) must be used, because if plain water is used, the cell will explode from osmotic pressure. Unlike plant cells and bacteria, animal cells have no cell wall to structurally support them.

Step Three - Obtain the specimen to be used. Some introductory biology classics for viewing include:
Skin of an onion bulb: In order to view the cells, a very thin layer of skin must be obtained. Take a single layer of onion and bend it towards the shiny side. After it snaps, pull gently, and a transparent layer of skin, similar to Scotch tape, will appear.
Elodea leaf: Elodea leaves are two cell layers thick. The cells in one layer are smaller than the cells in the other, so elodea leaves can be used to better understand a microscope's depth of field.
Cheek cells: Human epithelial cells can be obtained by gently rubbing a toothpick on the inside of the mouth, and then swirling the toothpick in the physiological saline on the slide.
Pond water: Obtaining some water from a pond makes wet mount preparation a breeze, since the water and the specimens are both included.
Hope this helps
8 0
3 years ago
At what stage of mitosis is there a regulatory checkpoint that detects chromosomal abnormalities
trasher [3.6K]
<span>The detection of chromosomal abnormalities occurs at the G1 stage. This is when the cell has to commit to the process of the rest of the cycle. Thus, if any abnormalities are detected the process can be delayed or stopped entirely.</span>
7 0
3 years ago
A tapeworm attaches to the inner intestinal wall of a black bass and absorbs nutrients from the fish's food. What is the relatio
Lunna [17]

Answer:

A

Explanation:

in a relationship a parasite is described as the member who greatly benefits in the relationship at the other's expense.

Like riding a stubborn horse, when it bucks you off, it gets the pleasure from doing so, but you end up with a broken foot.

The host is who hosts the other, and the tapeworm is attaching itself to a host so the answer must be A

cannot be b since no proof of that relationship, in both c and d the bass is caused harm so it is not mutual or beneficial to the bass in any way

i hope this helps u!

pls give a brainliest and a thx ;)

8 0
3 years ago
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