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balandron [24]
3 years ago
6

Scientists believe that ancient ancestors of all animals were.

Biology
2 answers:
harkovskaia [24]3 years ago
7 0
A is the answer
.....................................................
kicyunya [14]3 years ago
6 0

The correct answer is B. Single-celled prokaryotes that sometimes grew in colonies

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2 years ago
A strand of DNA that is 36 nucleotides long codes for how many amino acids?
Margarita [4]

Answer:

See answer below

Explanation:

Hi there,

Assuming this DNA strand is fully capable of being mature mRNA (5' m7G cap and PolyA tail), nucleotides lead to an mRNA codon, which is 3 nucleotides per codon. In turn, 1 codon leads to 1 amino acid. However, as a single strand, it must be capable of terminating translation, which always requires a stop codon, and thus 3 nucleotides. Hence, we must subtract this from the total amount of codons <em>first</em>.

36 \ ncltd \ \frac{1 \ codon}{3 \ ncltd} = 12 \ codon\\12 \ codon - 1 \ codon \  = 11 \ codon\\11 \ codons\ \frac{1 A.A.}{1 \ codon}  = 11 \ A. A.

Hence, only 11 amino acids will be coded by a single DNA strand 36 ncltd long.

thanks,

3 0
2 years ago
Why does electrical energy have the least amount of waste?
UkoKoshka [18]

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they burn no fuel and release no greenhouse gases

Explanation:

4 0
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Read 2 more answers
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