Arrange the following in order from smallest to largest.
a. Nucleoside, nucleotide, genome, gene
b. Nucleoside, nucleotide, gene, genome
c. Genome, gene, nucleotide, nucleoside
d. Gene, nucleotide, genome, nucleoside
e. Nucleotide, nucleoside, gene, genome
Ans: b. Nucleoside, nucleotide, gene, genome
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Bioluminescence is catalyzed by luciferase, which creates light by
A) shunting electrons from FMNH2 to O2, which releases energy in the form of light. B) reversing photosynthesis. C) hydrolyzing ATP. D) reducing LuxR.
Which of the following cells are classified as phagocytes? Select all correct choices
A. macrophages B. natural killer cells C. neutrophils D. mast cells E. plasma cells
Why is color-blindness more common in males than in females?
a. Because females would have to receive one copy of the recessive color blindness gene to actually express the trait. b. Because a male only needs to receive the recessive gene from his mother to be color-blind. c. Because color-blindness is an Y-linked trait. d. Females are hemizygous e. Males are never hemizygous
DNA contains the nitrogenous base ________ instead of ________, which is found only in RNA.
A) a deoxyribose sugar; a ribose sugar B) uracil; thymine C) uracil; guanine D) thymine; uracil