Which of the following is the most likely explanation for a high rate of crossing-over between two genes?
A. The two genes are far apart on the same chromosome.
B. The two genes are both located near the centromere
C. The two genes are sex-linked
D. The two genes code for the same protein
E. The two genes are on different chromosomes
Ans: A. The two genes are far apart on the same chromosome.
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Which of the following sequences correctly lists the hierarchical nature of cellular structures, from smallest to largest?
A) organic molecules, supramolecular structures, macromolecules, organelles, cells B) organelles, organic molecules, supramolecular structures, macromolecules, cells C) organic molecules, macromolecules, organelles, supramolecular structures, cells D) organic molecules, macromolecules, supramolecular structures, organelles, cells E) macromolecules, organic molecules, supramolecular structures, organelles, cells
The biochemical description of Myroides is:
a. oxidase positive, motile, and rapid urease positive. b. urease positive and has a fruity odor. c. resistant to vancomycin and will grow on MacConkey agar at 42°C. d. nonmotile and both urea positive and phenylalanine deaminase positive.
Some superficial mycoses are called ________.
A. mycetomas B. sporotrichosis C. tineas D. dermatophytoses
Factors that can alter the level of expression of a gene include
_____ an increase in environmental temperature. _____ an increase in salinity. _____ exposure to UV radiation. _____ presence of a particular energy substrate.