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dybincka [34]
3 years ago
11

1) How is DNA compacted to form a chromosome?

Biology
2 answers:
denis-greek [22]3 years ago
6 0

Answer: Answer is below in the explanation.

Explanation:

As shown in the animation from my school, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin, in turn, loops and folds with the help of additional proteins to form chromosomes.

(Link my school used https://www.biointeractive.org/classroom-resources/how-dna-packaged )

Vaselesa [24]3 years ago
3 0
Because all chromosomes build up to be a full DNA strand
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If there were a change in the DNA sequence, what would result?
Natalija [7]

Answer:

mutated dna

Explanation:

there would be either be dna substitutions, deletions or insertions. substitution simply changes the letter. deletion gets rid of a letter. insertion adds another letter.

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This is the first phase of cell division. In ________, the genetic material of the nucleus divides after making a copy of itself
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Prophase is the first stage in mitosis, occurring after the conclusion of the G2 portion of interphase. 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.

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Answer:

F10.229 is the answer.

Explanation:

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3 years ago
What is the most reasonable hypothesis for the increase in insects seen in year four?
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what? I think you're missing some crucial information in this question.

7 0
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A mutation in a polypeptide with the original amino acid sequence of: Met-Ala-Gln-Arg-Glu-Leu results in a mutant with the seque
Nezavi [6.7K]

Answer:

This question lacks options, however, it can be answered based on general understanding of the topic

The answer is SUBSTITUTION MUTATION

Explanation:

A mutation is any change that occurs in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. One type of mutation is SUBSTITUTION MUTATION, which is a mutation in which one or more nucleotide base is replaced by another in the sequence.

Nucleotide bases are read in a group of three called CODON. Each of these codons specify amino acid. Hence, if the nucleotide base sequence is altered during mutation, the amino acid sequence is altered likewise. In this case where the original amino acid sequence is: Met-Ala-Gln-Arg-Glu-Leu, the mutation affected the nucleotide bases coding for Arginine (Arg), hence changing it to Glycine (Gly).

This means that a base substitution mutation occured, replacing the amino acid Arginine with Glycine in the mutated sequence.

6 0
3 years ago
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