Which statement about cryptochrome is false?

a. It is implicated in resetting the biological clock.
b. It is a "clock protein."
c. It absorbs green light.
d. Its counterparts are found in fruit flies and mice.
e. It sometimes interacts with phytochrome.


c

Biology & Microbiology

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During human gestation, rudiments of all organs develop _____

A) in the first trimester B) in the second trimester C) in the third trimester D) while the embryo is in the oviduct E) during the blastocyst stage

Biology & Microbiology

The formula p2 + 2pq + q2 = 1 is associated with which of the following?

A. Calculations of heterozygosity B. Hardy-Weinberg equilibrium C. Calculations of recombination frequencies D. Degrees of freedom

Biology & Microbiology

A long piece of ribbon wired along both long edges is twisted into a helix and wrapped around individual pipe cleaners that have been rolled into spools; this grouping is then twisted (super coiled) again to condense it. This could be best used as a simple model for

a. a plasma membrane, where the pipe cleaners represent the phospholipid bilayer and the ribbon represents proteins embedded in the membrane. b. a cell wall. c. a mitochondrion. d. a chromosome, where the pipe cleaners represent bundles of proteins around which the DNA double helix (wired ribbon) is wrapped.

Biology & Microbiology

Crossing a heterozygous parent with a homozygous recessive parent should produce a ratio of dominant-to-recessive phenotypes of approximately _____.

A) 1:1 B) 2:1 C) 3:1 D) 9:3:3:1

Biology & Microbiology