Question

1) Inhibitors of microtubule assembly, vinblastine for example, are used for cancer chemotherapy. How does an inhibitor of microtubule assembly affect cancerous cells?

a. The inhibitors restrict the separation of chromosomes by the mitotic spindle.

b. The inhibition of microtubules interferes with the synthesis of proteins.

c. The inhibitors bind the microtubule to the nuclear membrane.

d. The inhibitors interfere with energy production.

2) Macrophages ingest and digest many pathogens. Which organelle plays a major role in the activity of macrophages?

1. chloroplast
2. lysosome
3. nucleus
4. peroxisome

3) Which organelles would be present in high numbers in the leg muscles of a marathon runner?

1. centrioles
2. chloroplasts
3. mitochondria
4. peroxisome

4) Why does the structure of the cytoplasmic membrane point to a common ancestor?

1. The presence of a cytoplasmic membrane in every organism does not point to a common ancestry.
2. The similar arrangement of phospholipids and proteins points to common ancestry.
3. The lipid nature of the membrane makes it the most primitive trait.
4. The similar effect of temperature on the membrane makes it the ancestral trait.

Answer 1

1) Inhibitors of microtubule assembly, vinblastine for example, are used for cancer chemotherapy. How does an inhibitor of microtubule assembly affect cancerous cells?

Correct answer: a. The inhibitors restrict the separation of chromosomes by the mitotic spindle.

2) Macrophages ingest and digest many pathogens. Which organelle plays a major role in the activity of macrophages?

Correct answer: b. lysosome

3) Which organelles would be present in high numbers in the leg muscles of a marathon runner?

Correct answer: c. mitochondria

4) Why does the structure of the cytoplasmic membrane point to a common ancestor ?

Correct answer: c.The lipid nature of the membrane makes it the most primitive trait.