The hydrophilic end of a phospholipid molecule is
A. glycerol
B. a fatty acid
C. an amino acid
D. water-insoluble
A. glycerol
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The lethality of most monosomies and trisomies in humans shows:
A. the importance of gene dosage. B. the deleterious effects of variable number tandem repeat sequences. C. the advantage of sexual reproduction. D. the rarity of gene copy number variation in the genome.
A sequence of bases in the middle of an RNA used to encode a polypeptide has the sequence UUA—AUG—CGU. Is it possible to infer the sequence of the amino acids encoded by this RNA?
A) Yes, the sequence is Leu—Met—Arg.
B) Yes, the sequence is Asn—Tyr—Ala.
C) No, this RNA sequence could encode more than one amino acid sequence.
D) No; the sequence of amino acids in polypeptides is not related to the sequence of bases in RNA.
What happens during the process of gene flow in a population?
a. DNA of organisms in a population is randomly changed through mutation b. the allele frequencies vary between generations due to migration c. allele frequency slowly shifts towards the dominant alleles in the population d. allele frequencies randomly change from random mating through the generations
Figure 6.5B
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Questions 12-14 refer to the figure above illustrating the results from Engelmann's investigation.
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Englemann's experiment was designed to determine ____.
A. what wavelengths comprise visible light B. what colors attract bacteria C. if bacteria are attracted to oxygen D. if photosynthesis releases oxygen E. if photosynthesis is impacted by the color of light