Each of the following is an example of microfilament-based motility and contractility except

A) ciliary motility.
B) pseudopodia formation.
C) cytoplasmic streaming.
D) cytokinesis.
E) trailing edge retraction in a moving cell.


Answer: A

Biology & Microbiology

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Two structural differences between a uridine monophosphate and thymidine monophosphate are ____ and ____

a. the number of hydrogen bonds formed between it and its matching base; the presence of a hydroxyl group on the ribose b. the presence of a methyl group on the nitrogen base; the presence of a hydroxyl group on the ribose c. the number of hydrogen bonds formed between it and its matching base; the presence of a methyl group on the nitrogen base d. the number of hydrogen bonds formed between it and its matching base; the location of the ribose attachment to the nitrogenous base e. the presence of a methyl group of the nitrogen base; the location of the ribose attachment to the nitrogenous base

Biology & Microbiology

Conjugation is the process by which ________

a. bacterial cells swap plasmids b. bacterial cells swap chromosomes c. one bacterium donates a single-stranded plasmid to another bacterium d. one bacterium donates a double-stranded plasmid to another bacterium

Biology & Microbiology

A plant hormone has the same effects in different plant tissues

Indicate whether the statement is true or false.

Biology & Microbiology

Which of these pairs is correctly matched?

A) IgE: typically structured as a pentamer B) IgG: first immunoglobulin produced in a primary immune response C) IgM: readily crosses the placenta to protect the fetus/newborn D) IgA: found in secretions such as colostrum, tears, and mucus

Biology & Microbiology