During Morula Development, the Divisions Are More Rapid Than in Most

question 146

Multiple Choice

During morula development, the divisions are more rapid than in most normal adult cells and the individual cells get progressively smaller. Which stage(s) of the cell cycle are probably truncated (made shorter) ?

• A)G1 and G2
• B)S phase
• C)M phase
• D)both M phase and S phase
• E)All of the stages are truncated.

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Definitions:

Ammonia

Nitrogen-containing compound (NH3) that is a toxic product of amino acid breakdown; a large amount of water is required to excrete it.

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, coupled with the transfer of protons across a membrane to generate ATP.

Mitochondrial Matrix

The innermost compartment of mitochondria, containing enzymes, mitochondrial DNA, and ribosomes, crucial for energy production.

Mitochondrial Intermembrane

The space located between the inner and outer membranes of a mitochondrion, involved in energy production through the electron transport chain.