Nondisjunction occurs when
A) a portion of a chromosome breaks off and is lost.
B) two chromosomes fuse into one.
C) members of a chromosome pair fail to separate.
D) an entire pair of chromosomes is lost during meiosis I.
Answer: C
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The diagram of an antibody above shows ___________
A. tertiary structure only B. quaternary structure only C. tertiary and quaternary structure. D. a sequence of nucleotides E. phospholipid structure
Which of the following steps occurs third during yeast Ty element transposition?
A. packaging of RNA in a VLP along with reverse transcriptase, a protease, and integrase B. transport of Ty RNA into the cytoplasm where it is translated into VLP proteins C. transcription of Ty element in the nucleus D. "infection" of nucleus with VLP E. Conversion of mRNA into double-stranded DNA with reverse transcriptase
Digestion of which organic molecule takes a somewhat more complicated route than most nutrients?
A) nucleic acid B) carbohydrate C) protein D) fat
The mitochondrial cristae are an adaptation that
A) helps mitochondria divide during times of greatest cellular respiration. B) increases the space for more copies of the electron transport chain and ATP synthase complexes. C) allows other ions (like Na+) to build up when H+ ions are not available. D) carefully encloses the DNA housed within the mitochondrial matrix. E) permits the expansion of mitochondria as oxygen accumulates in the mitochondrial matrix