A substrate binds an enzyme as a signal molecule binds a

A. second messenger.
B. kinase.
C. receptor.
D. transcriptional factor.
E. G-protein.


C. receptor.

Biology & Microbiology

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Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Crosses among heterozygotes give a 12:3:1 ratio

What type of gene interaction would account for these results?

Biology & Microbiology

One might expect that there would be a correlation between genome size and the complexity of an organism

However, some amphibia have genomes 10× the size of the human genome and even closely related species within phyla can have genome sizes that vary by orders of magnitude (e.g., flowering plants and amphibia). Give possible reasons for this variation. What will be an ideal response?

Biology & Microbiology

How many crossovers occur during Meiosis?

a. 46 - 95 b. 128 - 146 c. 22 - 39 d. 200 - 250 e. 160 - 195

Biology & Microbiology

An Acacia seedling grown in shade (50% full sun) is expected to have a ________ net assimilation rate (NAR) and a ________ leaf area ratio (LAR) than an Acacia seedling grown in full sun

A) higher; higher B) lower; lower C) lower; higher D) higher; lower

Biology & Microbiology