Which of the following statements regarding the chemical grooming of pyruvate is false?
A) Each pyruvate loses a carbon atom, which is released as CO2.
B) Two molecules of pyruvate are each converted into two-carbon molecules joined to a coenzyme A molecule.
C) Two pyruvate molecules together contain less chemical energy than was found in the original glucose molecule.
D) Each pyruvate molecule has a CO2 added and then joins with an NADH.
E) The pyruvate molecules are oxidized and two NAD+ are reduced.
Answer: D) Each pyruvate molecule has a CO2 added and then joins with an NADH.
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You are studying reproduction in a species of frog. Say there was a mistake in meiosis such that all the gametes produced by two individuals are diploid rather than haploid. Two of these gametes fuse. This zygote is:
A. haploid. B. diploid. C. tetraploid. D. octoploid.
What are at least two arguments for conserving biodiversity?
What will be an ideal response?
What is the fate of most of a woman’s mature
eggs?
a. they are fertilized b. they are stored for future use c. they die d. they are reset back to primary oocytes e. they stay immature
A morula contains about how many cells?
a. 1 b. 30 c. 100 d. 500 e. 1,000