Which summary best explains the mechanisms that control the cell cycle in multicellular

Biology

1 answer:

ivann1987 [24]3 years ago

3 0

Answer:

The correct answer is internal and external signals regulate the progression of the cell cycle at various critical check points.

Explanation:

The cyclic event that helps to prepare the cell for division is termed as cell cycle.Cell cycle are regulated by various internal and external factors which regulates the passage of cell through various critical check point.

For example Maturation promoting factor helps in the progression of frog egg oocytes cells from G2 to M phase.

G1 cyclin CDK helps in the passage of cell from G1 to S phase.

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2. Copy/paste and align the first 5 bases of all introns. Which bases are conserved near intron start ("donor site")?

Delicious77 [7]

Answer:

This question is incomplete

Explanation:

Introns are non-coding regions of a DNA that removed by RNA splicing prior to translation. Alignment is usually done between sequences to see and understand the identity and similarity between two or more sequences.

A region/base is said to be conserved if there is NO change in any base in that particular region. A multiple sequence alignment (MSA) can be used to align the donor sites of all the introns to see the bases that have not "changed" (and still remained in there exact position) hence conserved across all the donor sites.

NOTE: The donor site of an intron is the 5' end, thus the first five bases in the 5' end are to be used here

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Fynjy0 [20]

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During cellular respiration, the first CO2 is generated during _____ and the remaining carbons are given off as CO2 during _____

Julli [10]

Answer:

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During cellular respiration, the first carbondioxide gas is generated during glycolysis while the remaining carbons are given off as carbondioxide during Krebs cycle. During the process of glycolysis in cellular respiration, glucose is oxidized forming carbondioxide and water whereas during the Krebs cycle, the two carbon atoms of acetyl-CoA are released and each turns into a carbondioxide molecule.

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Accumulation of substances such as pesticides or other chemicals in an organism

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