A phosphate group is a compound containing phosphorus ____

a. and calcium attached to a base
b. and sodium attached to a sugar
c. chemically bonded to thymine
d. chemically bonded to four oxygen molecules
e. chemically bonded to three nitrogen molecules


d

Biology & Microbiology

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The spiracle in conjunction with a ventral gill in skates and rays is an adaptation that allows them to:

a. be nekton. b. have a bottom existence. c. position their mouth ventrally. d. avoid detection by predators. e. filter feed on plankton.

Biology & Microbiology

To make a transgenic Huntington Disease mouse, a copy of the mutant human HD gene was cloned into a vector, and the next step was to _____

1.transfer the vector directly into the foster mother mouse 2.microinject the vector into the nucleus of a fertilized mouse egg 3.transform bacteria using the engineered plasmid 4.insert the sequence into the genome of a virus and infect a mouse with the virus

Biology & Microbiology

Which of the following forms the insoluble layer of aromatic alcohols found primarily in woody tissues?

A) hyaluronates B) cadherins C) proteoglycans D) lignins E) pectins

Biology & Microbiology

Which of the following help(s) maintain the pressure driving fluid into Bowman's capsule?

a. the renin-angiotensin-aldosterone system b. antidiuretic hormone c. the diameters of the afferent and the efferent arterioles d. the diameters of the proximal and distal tubules

Biology & Microbiology