Most genetic alterations performed by researchers aim to change the ____
a. genotype of the organism without a change in phenotype
b. genotype of the organism, causing a change in phenotype
c. phenotype of the organism without a change in genotype
d. phenotype of the organism, causing a change in genotype
e. proteome of the organism without a change in genotype
ANSWER: b
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What is an alternative to RNA as the first polymer of life?
a. single nucleotides b. non-genetic polymers c. polymers that do not form a double helix d. other genetic polymers containing different sugars e. other genetic polymers containing different amino acids
When Avery and McCarty were attempting to identify the substance involved transferring hereditary material, they tested the ability of a bacterial S cell extract to transform R cells after different components of the extract were degraded by enzymes. Which treatment inhibited the ability of the S cell extract to transform R cells?
a. DNAse degrading enzymes b. RNAse degrading enzymes c. protein degrading enzymes d. lipid degrading enzymes e. amino acid degrading enzymes
Which of the following is NOT a steroid
hormone?
a. testosterone b. epinephrine c. cortisol d. aldosterone e. all of these are steroid hormones
Amino acids in a polypeptide are part of
a. the primary structure. b. carbohydrates. c. lipids. d. nucleic acids. e. most macromolecules.