Where are lipids that are destined for cell membranes synthesized?
a. Golgi bodies
b. ribosomes
c. mitochondria
d. lysosomes
e. smooth endoplasmic reticula
e
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In a lysosomal storage disease, the hydrolases of lysosomes are released from the cells, rather than being isolated into vesicles. What is one possible mechanism for this result?
A) A proton gradient within vesicles was not generated. B) The ER was unable to produce lysosomal vesicles. C) Lysosomal enzymes were not phosphorylated in the rER. D) There is a lack of mannose-6-phosphatase activity. E) There is a mutation in all hydrolase genes that results in loss of the signal peptide.
Which of the following statements is false?
a. Sharkâs teeth are modified scales that are continuously shed and replaced. b. Many fish use a swim bladder to provide buoyancy control. c. The bony fishes were the ancestors of the cartilaginous fishes. d. The ray-finned fishes are the most numerous and diverse of the fish groups. e. The lobe-finned fishes are represented today only by the coelacanths.
When one molecule of glucose is completely oxidized in aerobic respiration, the net amount of ATP
produced is: a. 2 b. 4 c. 22 d. 34 to 36 e. 36 to 38.
Which of the following organelle is seen inside the nucleus of a cell?
a. mitochondria b. centriol c. nucleolus d. ribosomes