Q1. The endosymbiotic theory suggests that because mitochondria have endosymbiot

Question

Q1.

The endosymbiotic theory suggests that because mitochondria have endosymbiotic origins, they would be expected to have characteristics similar to prokaryotes. Which of the following characteristics of mitochondria supports this theory? Select ONE option:

A. Mitochondria don’t have their own genomes.

B. Mitochondria make ATP.

C. Mitochondria have a double membrane.

D. Mitochondria can use oxygen.

Q2.

Which of the following are properties of the smooth ER?

(Select all that apply.)

A. It synthesizes membrane proteins and secretory proteins.

B. It synthesizes lipids.

C. It is studded with ribosomes.

D. It is continuous with the nuclear envelope.

E. It is continuous with the rough ER.

Q3.

Use the diagram of a eukaryotic cell drawn below to answer the following questions. Select all that apply for each question:

Part 1. Site(s) where most DNA and RNA is synthesized. Select ALL that apply:

1. A

2. B

3. C

4. D

5. E

6. F

7. G

Part 2. Site(s) of protein packaging and carbohydrate synthesis. Select ALL that apply:

1. A

2. B

3. C

4. D

5. E

6. F

7. G

Q4.

Part 1. Which cytoskeletal component is involved in determining the shape of the cell, directing cell movement, and facilitates the pinching in of a cell during cell division?

Select ONE option:

1. Actin filaments

2. Microtubules

3. Intermediate filaments

Part 2. Which cytoskeletal component is involved in coordinating the movement of organelles and transporting other macromolecules within a cell, and is also a key component of the mitotic spindle?

Select ONE option:

1. Actin filaments

2. Microtubules

3. Intermediate filaments

Part 3. Which cytoskeletal component provides a cell with mechanical strength and the ability to resist shear stresses?

Select ONE option:

1. Actin filaments

2. Microtubules

3. Intermediate filaments

Q5.

Part 1. When a white blood cell changes its shape, as seen at the end of “Inner Life of the Cell” animation, it is a consequence of the cell recognising its ---------- network.

Select ONE option for the blank:

1. Actin

2. Microtubule

Part 2. Mitochondria move within a cell along -----------.

Select ONE option for the blank:

1. Microtubules

2. Actin filaments

Q6.

Which of the following couples could potentially benefit from three-way IVF?

(Select ALL that apply.)

A. A couple where both the man and the woman have a mutation on chromosome 15 that affects a mitochondrial protein.

B. A couple where the woman but not the man has a mutation in a component of the electron transport chain encoded by the mitochondrial genome.

C. A couple where the man but not the woman has a mutation in a component of the electron transport chain encoded by the mitochondrial genome.

D. A couple where the woman but not the man has a mutation on chromosome 15 that affects a mitochondrial protein.

Explanation / Answer

1. D. Mitochondria can use oxygen.

2. B. It synthesizes lipids.

3. part 1. C Nucleus and B Endoplasmic Reticulum

part 2. E Golgi and D Cytoplasm

4.part 1. Actin filaments - Helps determine the shape of the
cell and provides structural integrity.

part 2. 2. Microtubules

Part 3 - 3. Intermediate filaments

5.
Part 1 - 1. Actin
Part 2. 1. Microtubules

6. B. A couple where the woman but not the man has a mutation in a component of the electron transport chain encoded by the mitochondrial genome.

Only mothers can pass Defalted Mitochondria to their children.

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