In DNA replication, _______________________ pairs with thymine, and cytosine pairs with _______________________.

adenine, guanine
guanine, adenine
cytosine, thymine
purine, alanine
none of the answer choices are correct
adenine, guanine


adenine, guanine

Biology & Microbiology

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Calcification zone

What will be an ideal response?

Biology & Microbiology

Although most of the estrogen and testosterone produced in the human body is made by the ovaries and testes, respectively, small amounts of these hormones are also produced by the ________

Fill in the blank(s) with correct word

Biology & Microbiology

How does the lactose repressor block transcription of the lactose operon?

a. by "turning off" the appropriate genes in the intron b. by regulating the activity of the enzymes that the operon codes for c. by binding allosterically to the appropriate genes d. by slowing the uptake of lactose into the cell e. by binding to the operator

Biology & Microbiology

The members of the supergroup Archaeplastida that have cell walls impregnated with calcium carbonate and help build coral reefs are the

A. multicellular green algae. B. dinoflagellates. C. brown algae. D. diatoms. E. red algae.

Biology & Microbiology