The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?
A. carbohydrates
B. lipids
C. bilipds
D. proteins
Ans: D. proteins
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The term used to describe bacteria that are rod-shaped is
A. vibrio. B. coccobacillus. C. coccus. D. bacillus.
Which of the following statements about DNA
replication is correct?
a. DNA replication is error free b. DNA replication occurs without the help of enzymes c. In DNA replication, the parent strands are discarded d. Each newly formed DNA molecule contains two new strands and two old strands. e. Each newly formed DNA molecule contains one parent strand and three new strands.
The human body may stop responding to a stimulus even though the original stimulus is still present; this is a process referred to as receptor adaptation.
Answer the following statement(s) true (T) or false (F)
All forms of diabetes mellitus involve defects in the production or function of insulin. The result of this defect in insulin is ________
A) a lack of sodium in the bloodstream B) a buildup of glucose in the bloodstream C) a lack of glucose in the bloodstream D) a buildup of sodium in the bloodstream