Which of the following molecules contains at least one peptide bond?
A) glycogen
B) cellulose
C) chitin
D) peptidoglycan
Answer: D
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The diagram below represents a protein electrophoresis gel with samples from six individuals tested for variants (alleles A and B) of a single protein. What are the genotype frequencies?
A. 33.3% A, 66.6% B B. 75% A, 25% B C. 25% B, 75% A D. 66.6% A, 33.3% B E. Can't determine the frequency from this information.
Which of the following occurs immediately after a haploid spore germinates?
a. A gametophyte is created by mitosis. b. A gametophyte is created by meiosis. c. A sporophyte is created by mitosis. d. A sporophyte is created by meiosis.
Xylem sap mainly contains
(A) water and amino acids (B) water and sugar (C) sugar and minerals (D) water and minerals
What is the term used to describe the amount of antibody in a patient's serum?
a. concentration b. differential c. dilution d. titer