Four of these statements about master genes are true. Which statement is not true?
A. They orchestrate layers of development.
B. They are highly conserved over evolutionary time.
C. Mutations within these are frequently devastating.
D. They are highly variable in their sequences between species.
E. Mutations usually result in changes in body plan.
Answer: D
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Nondisjunction in the sex chromosomes is more severe than in the autosomes
A. true B. false
Which membrane would show a more rapid recovery of fluorescence in a FRAP study?
A. a membrane containing equal amounts of saturated and unsaturated fatty acids B. a membrane containing a larger proportion of saturated fatty acids C. a membrane containing a larger proportion of unsaturated fatty acids D. The saturation of fatty acids in a cell membrane does not affect the speed of fluorescence recovery in a FRAP study. E. a membrane containing a large amount of cholesterol
Which statement is CORRECT concerning animal viruses?
a. Enveloped viruses are surrounded by a lipid and carbohydrate coat, which is made from the host cell's mitochondria. b. The genome of animal viruses is always single-stranded. c. Capsid proteins are produced in the nucleus. d. Retroviruses use an enzyme called reverse transcriptase, which synthesizes DNA by copying RNA.
Where is the electron transport chain located in bacterial cells?
A. Periplasm B. Mitochondrial inner membrane C. Mitochondrial outer membrane D. Plasma membrane