The smallest genome would most likely be found in a
a. virus
b. bacteria
c. fungus
d. human
Answer: a. virus
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Complementation studies can be performed in bacteria by
A) gene targeting. B) forming merodiploids with one copy of a bacterial gene on an F? plasmid. C) forming merodiploids with two copies of a bacterial gene on F? plasmids. D) forming diploids with two copies of the bacterial chromosome.
Suppose you discover a mutant plant that cannot actively transport solutes across the tonoplast. Which
of the following should you expect?
a. The plant will wilt easily. b. The plant will generally be like a normal plant. c. The plant will not have leaves. d. The plant will not have roots. e. The plant cells will not be able to divide.
Matching. Choose the most appropriate letter
1. ___ Thermus aquaticus 2. ___ Cyanidium caldarium 3. ___ Amoeba discoides 4. ___ nanobes 5. ___ proto-cells 6. ___ stromatolites 7. ___ cyanobacteria 8. ___ Bangiomorpha pubescens 9. ___ glaucophyte A. contain DNA, but may be too small to be alive B. simple transitional forms between early organic compounds and the first living cells C. red alga resident of hot springs D. first organisms with the noncyclic pathway of photosynthesis E. source of the heat-resistant enzyme used in PCR F. offered support for endosymbiosis G. dome-shaped fossil remains of photoautotrophic bacteria (some nonfossil structures also form. H. protist with photosynthetic organelles that resemble cyanobacteria I. earliest known organism that can be assigned to a modern group
Members of the genus Micrococcus usually exist as ________.
A. irregular clusters B. pairs C. tetrads D. All of the choices are correct.