XH2 + NAD+ ? X + NADH + H+. In the preceding equation, NAD+ is said to be:

a. an enzyme.
b. storing two hydrogen atoms.
c. reduced.
d. oxidized.
e. a catalyst.


D

Biology & Microbiology

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Refer to the paragraph about Kawakubo's group. Kawakubo's group created a glycoprotein with a terminal NAG (i.e., a protein with NAG attached to its end). Their hypothesis is that the terminal NAG, and not the protein component , is responsible for the damage to the cell wall in H. pylori. What would be the most appropriate control for testing this hypothesis?

A) Grow H. pylori in a test tube (in vitro) with no glycoprotein. B) Destroy the H. pylori by exposing them to a hypotonic solution. Then add the glycoprotein and observe. C) Expose other species of bacteria to the glycoprotein. D) Grow H. pylori in a test tube with a glycoprotein that has its terminal NAG removed.

Biology & Microbiology

If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of

A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. spermatic behavior.

Biology & Microbiology

How many chromosomes are in a red blood cell taken from a normal person? ____________________ Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Characteristics that have arisen as a result of common evolutionary descent are said to be

A) Shared characteristics B) Derived Characteristics

Biology & Microbiology