In DNA, complementary base pairing occurs between
a. cytosine and uracil.
b. adenine and guanine.
c. adenine and uracil.
d. adenine and thymine
e. uracil and guanine.
D
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Which of the following is not true with regard to compacting nucleic acids?
A. Some viral coat proteins are RNA-binding proteins that compact the RNA genome of the virus. B. There are enzymes that introduce and maintain coiling of double-stranded DNA molecules. C. There are DNA-binding proteins that maintain structural organization in eukaryotes. D. There are DNA-binding proteins that maintain structural organization in bacteria. E. Single-stranded RNA viruses compact their genomes by packaging complementary RNA.
In the back and forth evolutionary struggle between plants and virulent bacteria, plants use ____ immunity to combat
the bacteria.
a. effector-triggered b. systemic acquired c. gene-for-gene d. hypersensitive e. jasmonate response
What is the result of mitosis? a. New genetic combinations
b. Fewer offspring produced each generation. c. Better adaptability to new environments. d. Offspring that are more adaptable than the parents. e. Offspring that are genetically identical to the parents.
Which of the following cell features is absent
in a bacterial cell?
a. plasma membrane. b. cytoplasm. c. nucleoid. d. nucleus. e. DNA