To carry out their function, kinesin family proteins must attach to their respective
A) dynein.
B) cargo.
C) adaptor proteins.
D) only choices B and C
E) choices A, B, and C
D) only choices B and C
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The biological species concept
1.defines a species as a group that can interbreed and produce fertile offspring. 2.applies to asexually reproducing organisms. 3.looks at visible traits. 4.emphasizes evolutionary relationships. 5.was used by Carolus Linneaus.
Translational controls of protein levels in bacteria are governed by:
a. the rate at which small and large subunits of ribosomes assemble. b. the rate at which the cap and tail of pre mRNA are removed. c. the rate at which ribosomes attach to mRNA molecules. d. the concentration of proteins in the cytoplasm. e. the rate at which sugars are incorporated into the cell.
Nondisjunction during meiosis results in an abnormal number of chromosomes in one or more gametes. In some cases of nondisjunction, a single chromosome fails to separate. In others, none of the chromosomes separate. Suppose an egg is produced in which none of the chromosomes separate during meiosis II. What is the chromosome number of the zygote that results if this egg is fertilized by a normal sperm?
A. 1n B. 2n C. 2n + 1 D. 3n
Many pathogenic bacteria produce a(n)________ that protects them from phagocytosis by host cells
a. flagellum b. pilius c. capsule d. endospore