Matching. Choose the best matching element
1. ___ anticodon
2. ___ McClintock
3. ___ codon
4. ___ messenger RNA
5. ___ polysome
6. ___ promoters
7. ___ transcription
8. ___ translation
A. RNA-directed synthesis of polypeptide
chains
B. sites at which RNA polymerases can bind
and initiate transcription
C. binds to small subunit platform of a
ribosome
D. guided and catalyzed by RNA polymerases
E. polypeptide chain elongation proceeds
independently at each body in this cluster
F. discovered transposons
G. a tRNA triplet opposite a codon
H. a set of three nucleotides
Answers: 1. G, 2. F, 3. H, 4. C, 5. E, 6. B, 7. D, 8. A
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Cilia and flagella (select all correct choices):
A. are specialized cells that move by rotary motion. B. are specialized organelles that move by rotary motion. C. are specialized organelles that propel some plant, algae, and animal cells. D. contain microfilaments arranged in nine pairs around the periphery and two microfilaments in the center. E. contain microtubules arranged in nine pairs around the periphery and two microfilaments in the center.
Mycorrhizae are especially effective in helping plant roots uptake
A. nitrogen. B. phosphorus. C. potassium. D. iron. E. magnesium.
Myosin is a motor protein that associates with:
a. microtubules. b. intermediate filaments. c. microfilaments. d. vimentin.
You work for a company that manufactures food products. A new "wonder food" is being distributed by a rival company. The researchers in your company determine that the "wonder food" contains only carbon, oxygen, and hydrogen. At this point, your
researchers can say with certainty that the food A) includes proteins. B) could only be made of triglycerides. C) could only be made of carbohydrates. D) does not include proteins or nucleic acids.