Eukaryotic Cell Questions

Question 1

A child is diagnosed with an enzyme deficiency that prevents the production of hydrogen peroxide. What would the likely outcome be of such a deficiency?

Answer 1

Hydrogen peroxide breaks down fatty acids by beta-oxidation. Long fatty acid chains would accumulate.

Question 2

What is the dominant protein in microfilaments?

Answer 2

actin

Question 3

What is the dominant protein in microtubules?

Answer 3

tubulin

Question 4

What is the dominant protein in intermediate filaments?

Answer 4

depends on the cell, but mainly keratin and desmin

Question 5

How do the cytoskeletal structures of centrioles and flagella differ?

Answer 5

Centrioles: 9 triplets of microtubules, hollow center

Flagella: 9 microtubules on the outside, 2 at the center.

Question 6

Would the following be considered epithelial or connective tissue:

Fibroblasts, which produce collagen in a number of organs.

Answer 6

collagen = connective

Question 7

Would the following be considered epithelial or connective tissue:

Endothelial cells, which line blood vessels:

Answer 7

lining = epithelial

Question 8

Would the following be considered epithelial or connective tissue:

α-cells, which produce glucagon in the pancreas:

Answer 8

secretions = epithelial

Question 9

Would the following be considered epithelial or connective tissue:

Osteoblasts, which produce osteoid, the material that hardens into bone:

Answer 9

structure/bone = connective

Question 10

Would the following be considered epithelial or connective tissue:

Chondroblasts, which produce cartilage:

Answer 10

structure/bone = connective