Question

1. during exocytosis, what happens to the vesicle within the cell?

a. it fuses with the cell membrane and releases its contents outside the cell.
b. it is engulfed by the cell membrane.
c. it breaks down into smaller molecules.
d. it stores waste products within the cell.

1. if a homozygous recessive individual (rr) is crossed with a heterozygous individual (rr), what is the probability of their offspring having the dominant phenotype?

a. 0%
b. 50%
c. 25%
d. 75%

1. what is the function of the mitochondrion in cellular respiration?

a. it stores atp for cellular activities.
b. it breaks down glucose in the cytoplasm.
c. it synthesizes proteins in the nucleus.
d. it hosts the citric acid cycle and the electron transport chain.

Explanation:

• For question 32: Exocytosis is a process where a vesicle fuses with the cell - membrane to release its contents outside the cell.
• For question 33: When rr (homozygous recessive) is crossed with Rr (heterozygous), the possible genotypes of offspring are Rr and rr in a 1:1 ratio. The dominant phenotype is present in 50% of the offspring.
• For question 34: The mitochondrion is the site of the Citric - Acid Cycle and the Electron - Transport Chain in cellular respiration.

Answer:

1. a. It fuses with the cell membrane and releases its contents outside the cell.
2. b. 50%
3. d. It hosts the Citric Acid Cycle and the Electron Transport Chain.