Creutzfeld-Jacob disease is
A. caused by a chronic latent virus.
B. initiated by an oncogenic virus.
C. caused by a viroid.
D. a spongiform encephalopathy of humans.
E. also called "mad cow disease"
Ans: D. a spongiform encephalopathy of humans.
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What waste product do yeast produce under anaerobic conditions?
A) ethyl alcohol B) pyruvic acid C) lactic acid D) creatine
Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Which of the following options correctly lists the order of the structures through which insulin passes from its production to its exit from the cell?
A) rough ER, transport vesicles, Golgi apparatus, transport vesicles, cell membrane B) rough ER, lysosomes, transport vesicles, cell membrane C) rough ER, Golgi apparatus, smooth ER, cell membrane D) rough ER, transport vesicles, Golgi apparatus, vacuole, cell membrane
Which of the following occurs during anaphase I?
A) Cytokinesis occurs. B) Homologous chromosomes are separated. C) Sister chromatids are separated. D) Homologous chromosomes are moved to the metaphase plate. E) Crossing over begins.
Three-quarters of the substantial amount of energy consumed by the brain is used to run a single molecular machine that maintains the resting potential of neurons. What is this machine called?
A. Voltage-gated sodium channel B. K+ leak channel C. Sodium-potassium pump D. Voltage-gated calcium channel E. Acetylcholine receptor