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Scilla [17]
3 years ago
11

MicroRNAs control gene expression at the level of _______. See Section 19.4 (Page 389) .

Biology
1 answer:
Alenkinab [10]3 years ago
5 0

Out of the following given choices;

transcription

protein stability

mRNA processing

translation

<span>The answer is mRNA processing. microRNA regulate gene posttranscriptionally by silencing mRNA. microRNA is short (approximately 20 nucleotides) and base-pairs with mRNA during its processing hence interferes with its progression to translation by causing the cleavage of the mRNA or  shortening the poly-A tail</span>




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If a frog cell with 2n = 26 undergoes mitosis one of the daughter cells would have _____ chromosomes and if that frog cell with
KengaRu [80]

Answer:

C.) 26 - 13

Explanation:

During mitosis, DNA is replicated during the S phase so that when the cell divides the daughter cells will have the same number of chromosomes that the parent cell had.

DNA replication also occurs during meiosis, but the cell divides twice, so the daughter cells will have half the number of chromosomes that the parent cell had. This is because the daughter cells are sex cells, which combine with another sex cell (either an egg or a sperm) to form one cell with a combined chromosome number.

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What led to scientists accepting Mendel's ideas?
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Answer:

A. Scientists discovered chromosomes and DNA.

Explanation:

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When scientists discovered chromosomes and DNA, they were able to see how Mendel's observations made sense in the context of DNA and chromosomes.

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3 years ago
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Where do the branches of the bronchial tree ultimately end? 2. list the steps of the pulmonary circuit of the cardiovascular sys
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7. Structures that make up the pathway of air through the respiratory system starting with the external nares; We start with; External nares, nasal cavity, internal nares, nasopharynx, laryngopharynx,oropharynx, larynx, trachea, primary bronchus, secondary bronchus, tertiary bronchus, bronchiole, terminal bronchiole, respiratory bronchiole, alveolar duct, alveolar sac and alveolus. 
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3 years ago
Explain why it is that translation cannot happen, unless transcription happens first.
Aleks [24]

Answer:

Translation uses DNA as a template to direct the synthesis of a RNA which in turn serves as a template for Translation which template is used to direct the synthesis of a polypeptide chain.

Without transcription, there will not be a mRNA strand to act as a template for translation by the ribosomes to occur at all.

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3 years ago
In the development of a cancer cell, the formation of new blood vessels is called
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