The major structural components of a cell membrane are ____
a. phospholipids and cellulose
b. phospholipids, protein, and sterols
c. protein and sterols
d. glycolipids and proteins
e. phospholipids and glycolipids
ANSWER: b
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Any organism that can cause disease in the host after direct interaction is a(n)
A. secondary pathogen. B. focal pathogen. C. opportunistic pathogen. D. primary pathogen.
The number of cases of a specific disease per one hundred people exposed is called the
A. attack rate. B. index rate. C. mortality rate. D. obesity rate.
In prokaryotes, which of the following types of regulation will NOT occur?
a. chromatin remodeling b. variations of mRNA turnover c. variations in protein turnover d. activation of promoters e. regulation of transcription
A reddish chemical, lipofuscin, is found in greater quantities in cells of older people than in those from younger people. This chemical should be broken down in the cells. Which specific type of organelle is not working as well in the seniors?
A) lysosome B) mitochondrion C) nucleus D) rough endoplasmic reticulum