The nucleotide that serves as an energy carrier in cells is _____
a. trans fat
b. ATP
c. DNA
d. glycogen
e. RNA
Ans: b. ATP
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Which of the following statements is
INCORRECT about eukaryotic chromosomes?
a. The number of chromosomes varies from one species to another. b. All eukaryotes have the same system of autosomes and sex chromosomes. c. A chromosome consists of DNA associated with histone proteins. d. After duplication, all paired chromosomes are attached at the centromere. e. After duplication, each chromosome consists of two sister chromatids.
A mutation affecting which of the numbered enzymes in this protein metabolism pathway results in PKU? (refer to figure on previous slide)
1.1
2.2
3.3
4.4
5.5
6.6
Implantation of an embryo normally has occurred by how long after fertilization?
A. 3 days B. 6 days C. 12 days D. 20 days E. 1 month
Which of the following is a valid difference between traditional (selective breeding) and modern (genetic engineering) forms of biotechnology?
A) Genetic engineering can use genes from unrelated species, whereas selective breeding must use genes from the same or very closely related individuals. B) Selective breeding can be done much more quickly than can genetic engineering. C) Genetic engineering can alter the DNA sequence of entire populations, whereas selective breeding cannot.