What is the genetic code?
a. all of our genes collectively
b. all of our base-pairs collectively
c. the genetic “words” that code for amino acids
d. the genes in DNA that code for proteins
e. the genes that encode protein products
ANSWER: c
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Which of the following chemical bonds is the strongest?
A. hydrogen B. Van der Waal forces C. hydrophobic interactions D. ionic E. covalent
Genetic imprinting is caused by ____
a. insertion of a nucleotide into an exon b. deletion of an amino acid from the mRNA strand c. a frameshift mutation d. epigenetic changes to DNA e. a change in a termination codon
During what stages of the cell cycle are sister chromatids bound together by cohesin?
A. S, G2, prophase, metaphase B. S, G2 C. G1, S, G2 D. S, G2, prophase, metaphase, anaphase, telophase E. G1, S
Bryophytes have all of the following characteristics except
A) multicellularity. B) specialized cells and tissues. C) lignified vascular tissue. D) walled spores in sporangia. E) a reduced, dependent sporophyte.