Which of the following structures are used by bacteria, fungi, and protozoans to adhere to their host?

a. lysosomes
b. flagella
c. actin skeleton
d. fimbrae
e. capsule
f. spike
g. surface proteins
h. slime layer


d. fimbrae
e. capsule
g. surface proteins
h. slime layer

Biology & Microbiology

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Genetic sequences may be useful in predicting protein structure because

A. there is a high statistical frequency of specific amino acids within a given secondary structure B. the folding of the protein is based on how the mRNA folds. C. the physical and energetic properties of the DNA influence protein folding. D. knowing what specific codons are used for each amino acid in the protein can help predict its structure.

Biology & Microbiology

The __________ develops into a corpus luteum

a. zona pellucida b. uterine wall c. primary oocyte d. secondary oocyte e. follicle

Biology & Microbiology

The best definition of antigen is

A) Something foreign in the body. B) A chemical that elicits an antibody response and can combine with these antibodies. C) A chemical that combines with antibodies. D) A pathogen. E) A protein that combines with antibodies.

Biology & Microbiology

Ommatidia are found in the compound eyes of

A) mollusks. B) amphibians. C) humans. D) insects. E) flatworms.

Biology & Microbiology