The continuous release of mucus by the epithelial cells lining the respiratory tract is an example of
A) regulated secretion.
B) constitutive secretion.
C) the mucus response.
D) the formation of clathrin-coated pits.
E) phagocytosis.
B) constitutive secretion.
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An important message from the work of Thomas Malthus that influenced Charles Darwin was
A. animals tended toward "human perfection." B. only a fraction of any population will survive and reproduce. C. population size of humans can. D. inheritance of acquired characteristics. E. none of these. Charles Darwin was influenced by John Ray not Thomas Malthus.
In a eukaryotic cell, the Krebs cycle occurs in the
A. lysosome. B. ribosome. C. cytoplasm. D. mitochondria. E. nucleus.
Which of the following is a region of DNA at the end of a linear chromosome?
A. Primer B. Telomere C. Intron D. Exon
How is the HIV provirus different from a lambda-phage prophage?
A) the HIV provirus is integrated permanently into the host cell's DNA. B) all subsequent generations of HIV-infected cells carry the provirus. C) all the offspring of a cell infected with a prophage will contain the virus. D) the HIV provirus is inactive inside the host cell. E) lambda phage-infected cells produce virus slowly over time.