A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in Group of answer choices

This question is incomplete. Group of answer choices are:

A. G1

B. G2

C. Prophase

D. Metaphase

E. Anaphase

The correct answer is A.

Explanation:

The G1 phase (Gap 1 phase) is the period of the cell cycle from the time a cell is born until the S phase begins. When the G1 phase begins (just after the division of the stem cell) the size of the newly originated cell is half of its normal size, and the cell must grow to reach it. For this, in this period, RNA and proteins are actively synthesized. During this period, the cell has only the amount of DNA that it has received from its progenitor and each chromosome is made up of a single chromatid, since DNA replication has not yet occurred.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.