Exam 1: Practice Questions

Question 1

A 6-month-old baby girl presents in the ER with poor ability to suck and swallow, seizures, limb rigidity, and yellowish-brown skin pigmentation. After a physical examination, you find that she has an enlarged liver and spleen and some eye movement disorders. You also discover that she has suffered from extensive brain damage. You decide to do a bone marrow biopsy and find some abnormally-shaped cells as a result of a build-up of cell waste.

• What defective organelle is most likely causing her distress?

Answer 1

Defective lysosomes

Question 2

A 6-month-old baby girl presents in the ER with poor ability to suck and swallow, seizures, limb rigidity, and yellowish-brown skin pigmentation. After a physical examination, you find that she has an enlarged liver and spleen and some eye movement disorders. You also discover that she has suffered from extensive brain damage. You decide to do a bone marrow biopsy and find some abnormally-shaped cells as a result of a build-up of cell waste.

What is causing her enlarged spleen and liver?

Answer 2

A buildup of cell waste – the spleen and the liver are the major recycling and filtering organs of the body; thus, their cells have a large concentration of lysosomes

Lysosomal Storage Disease

Question 3

What is the final electron carrier/acceptor of Photosystem 1?

Answer 3

NADP+

Question 4

Where do plants get the atoms that make up the vast majority of their carbon-based mass?

Answer 4

CO₂ (air)

Question 5

Is the ATP being oxidized or reduced by the ATP synthase?

Answer 5

Reduced (Electrons are Gained)

Question 5

What would happen to the rate of photosynthesis with more CO₂? Less?

Answer 5

More -> speed up
Sess -> Slow down