What is the name of the pigment that captures photons during photosynthesis?
A) photonogene
B) titanium dioxide
C) chlorophyll
D) melanin
Answer: C) chlorophyll
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The amino acid referred to as the "helix breaker" (because it lacks the hydrogen atom needed for hydrogen bonding) is
A) leucine. B) proline. C) methionine. D) valine. E) phenylalanine.
A man with trisomy 21 could pass Down syndrome to offspring if he
A) produces sperm that have two copies of chromosome 21. B) produces sperm lacking chromosome 21. C) also has Turner syndrome. D) is a carrier of a deletion for chromosome 21.
The distribution of individuals in a school of
fish is likely to be a. clumped. b. random. c. uniform. d. constant. e. homogeneous.
What did Watson and Crick deduce about the three-dimensional structure of DNA?
A) There is a repeating pattern every 3.4 nm and every 0.34 nm. B) It is a double-stranded helix. C) It contains a lot of phosphorus. D) It is a large molecule. E) It consists of supercoiled chromatin.