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zysi [14]
3 years ago
14

Which one of the following statements about ribosomes is true?

Biology
1 answer:
Jobisdone [24]3 years ago
8 0

Answer:

D) There are two major subunits, each with multiple proteins.

Explanation:

The ribosome is a complex structure made of RNA and proteins. Both prokaryotic and eukaryotic ribosomes have two subunits: small and large subunits. Each of these subunits is made of specific types of ribosomal RNAs (rRNA) and a number of different proteins.

For example, the 30S subunit of <em>E. coli</em> ribosome has 21 different proteins while its 50S subunit is made of 33 different types of proteins along with rRNA.

Likewise, the 40S subunit of a eukaryotic ribosome is made of 33 proteins while its 60S subunit has 47 proteins. The eukaryotic ribosome contains a total of 80 different proteins.

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3 years ago
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A man who has type B blood has children with a woman who has type A blood. A. If they are both heterozygous for this trait, pred
Ivenika [448]

Answer:

The possible blood types of their children are: type AB (iAiB), type A (iAi), type B (iBi), type O (ii)

Explanation:

Blood type in humans is controlled by a gene with multiple alleles. Alleles iA and iB are dominant over allele i but co-dominant. The following blood types are encoded by the following alleles:

Blood type AB - iAiB

Blood type A - iAiA or iAi

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According to this question, a man who has type B blood has children with a woman who has type A blood. They are both heterozygous, meaning that the man's genotype is "iBi" while the woman's genotype is "iAi". Both parents will produce gametes as follows:

iBi = iB and i

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Using these gametes in a punnet square (see attached image), the following possible blood types are produced in the offsprings:

- type AB (iAiB)

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6 0
3 years ago
URGENT: Why does an increase in carbon dioxide increase the quantity of hydrogen ions in blood?
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Explanation:

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When energy is transferred to air what happens to the particles of air ?
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Answer:

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olganol [36]
Nope. correct answer is D
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3 years ago
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