In penetration by endocytosis, the entire virus is engulfed by the cell and enclosed in a vacuole or vesicle.

a. true
b. false


Ans: a. true

Biology & Microbiology

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Which of the following traits is not characteristic of amniotes?

a. internal fertilization b. waterproof skin c. aquatic larval stage d. egg that can develop on land

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Genetic variation in behavior occurs between species and within species. Describe the genetic basis for the difference in mating behaviors in closely related species of voles

What will be an ideal response?

Biology & Microbiology

An envelope

a. surrounds the nucleus. b. surrounds mitochondria. c. consists of two membranes. d. does all of the above.

Biology & Microbiology

You recently identified a molecule that you believe is a primary messenger for a signal transduction mechanism. All you know about this ligand is that it is hydrophilic. Where would you expect to find initial interaction of the molecule with its receptor?

A) on the outer surface of the plasma membrane B) within the cytoplasm of the cell C) within the nucleus of the cell D) on the cytoplasmic side of the plasma membrane E) in endosome vesicles

Biology & Microbiology