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anyanavicka [17]
3 years ago
8

Compare and contrast the processes and products of mitosis and meiosis

Biology
1 answer:
Igoryamba3 years ago
8 0
Mitosis has 4 stages in total while meiosis has 8 stages in total. mitosis happens in somatic cells while meiosis happens in germ cells. Mitosis produces 2 diploid daughter cells while Meiosis produces 4 haploid daughter cells. They are the similar because they both produce new cells, similar basic steps, and they both start with a single parent cell
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Which of the following is NOT an accurate description of protein synthesis and folding?
julia-pushkina [17]

Answer:

OPTION b. "<em>The 3D shape of a protein is determined largely by the ribosome forming the protein" </em> is NOT an accurate description of protein synthesis and folding.

Explanation:

<em>a. Many copies of a protein can be synthesized simultaneously from the same mRNA</em>.  TRUE. As a ribosome moves along the mRNA chain synthesizing a new protein, another ribosome might follow it, synthesizing another protein from the same mRNA chain. And so on. So, at the same time, many ribosomes might be attached to the mRNA, synthesizing many copies of the protein, but at different development levels. The mRNA chain together with many ribosomes is called a <em>polyribosome</em>.

b. <em>The 3D shape of a protein is determined largely by the ribosome forming the protein</em>.  FALSE. What determined the 3D structure of the protein is the amino acid sequence of that particular polypeptide. Each amino-acid has different properties (hydrophobic, hydrophilic, positively charged, negatively charged) and they interact with each other by different bonds that depend on those poperties. So the amino acids composing the proteins and their interaction, is what models the structure of the protein.

c. <em>The entire chain of amino acid exits the ribosome before it begins folding into its 3D shape</em>.  TRUE. When the ribosome reaches the end codon, the elongation process has finished, and the new protein leaves the ribosome and is translocated to the RER lumen where it is going to get folded.

d. <em>The first encoded amino acid in every protein is methionine. </em>TRUE. Almost always, the first amino acid located by the tRNA is the methionine, codified by the initiation codon AUG. This amino acid is frequently eliminated at the end of the process.

7 0
3 years ago
Suggest how a platypus adapt to its habitat​
adoni [48]

Explanation:

Platypus is well adapted for semi-aquatic lifestyle. Its streamline body and a broad, flat tail are covered with dense waterproof fur, which provides excellent thermal insulation. ... The Platypus uses its tail for storage of fat reserves and the strong claws on its feet for burrowing and moving on land.

8 0
3 years ago
An element's atomic number is 74. How many protons would an atom of this element have?
Dmitry [639]
Atomic number of an atom equals to the number of nucleus in the nucleus of the atom. Therefore, the answer is 74.

The proton of an element is never changed. No matter if it's an atom or ion. It's like an ID number for an element. It defines the type of element. Don't mix up atomic number with mass number though, mass number is the total sum of of the number of protons and neutrons in an atom.

Theres one more subatomic particle in an atom, that is electrons. But since they're too light, they won't be counted in mass. Also, the number of electrons in an atom equals to the number of proton, also the atomic number. If the number of electrons is different, it's no longer an atom, but an ion.
3 0
3 years ago
Describing the Different Levels of Organization
Ivahew [28]

Answer:

the answer is a

Explanation:

because that's the right answer

3 0
2 years ago
The diagram below, called a cladogram, shows a proposed evolutionary relationship among animals. According to the cladogram, wha
Lilit [14]
Lungs, claws/nails, fur, and mammary glands. The rat is most closely related to the dove.
7 0
3 years ago
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