A population of cells that are genetically identical and may be carrying a desired plasmid is called a(n)
a. genus.
b. clone.
c. vector.
d. exon.
Ans: b. clone.
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What accounts for the ability of vesicles to fuse with different membrane compartments in the cell?
A. the cell's cytoskeleton B. the fluid nature of the phospholipid bilayer C. peripheral membrane proteins D. transport proteins
In pea plants, the allele for round peas (R) is dominant to the allele for wrinkled peas (r). A gardener has a plant that his neighbor gave him that produces round peas, but he does not know its genotype. What simple procedure could he do to determine the genotype of his new plant?
a. Perform a dihybrid cross—if only 1 out of 16 offspring are wrinkled, then the new plant’s genotype is RR. b. Perform a test cross with a plant that has wrinkled peas—if any offspring give wrinkled peas, then the new plant’s genotype is Rr. c. Perform a test cross with a plant that has an Rr genotype—if all of the offspring give round seeds, then the new plant’s genotype is Rr. d. Perform a monohybrid cross—if any offspring give round peas, then the new plant’s genotype is RR.
The first cells were
a. autotrophic. b. parasitic. c. anaerobic. d. aerobic. e. all of these.
________ ER is covered by ribosomes and sends its modified proteins to the Golgi apparatus.
Fill in the blank(s) with the appropriate word(s).