The most abundant white blood cells are
a. eosinophils.
b. lymphocytes.
c. monocytes.
d. basophils.
e. neutrophils.
E
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Which process is NOT associated with structures that are formed from the extensive infolding of eukaryotic
membranes? a. concentration of nutrients b. cell division c. transport of proteins d. protection of metabolic machinery e. greater surface area for metabolism
Which of the following statements about cancer defense is false?
a. Natural killer and cytotoxic T cells destroy cancer cells. b. Cancer antigens stimulate a strong immune response. c. Monoclonal antibodies can deliver toxic drugs to cancer cells. d. T cells produce interleukins, which defend against cancer. e. Macrophages produce tumor necrosis factor, which inhibits tumor growth.
Your friend is trying to learn about how to kill bacteria. She reads that preservatives such as citric acid are added to foods because the acidic environment kills bacteria by denaturing their proteins
She thinks this sounds like a lot of scientific jargon and asks you what it means. How can you explain it in simpler terms? A) Denaturing their proteins means that the proteins in bacteria are converted into carbohydrates. B) Denaturing refers to the fact that the bacterial cells divide too quickly and die. C) The acid causes the cells to swell and burst open, also known as denaturation. D) Denaturing means that the proteins of the bacteria lose their structure and can't function, so the bacteria die.
The scientific method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.
Answer the following statement true (T) or false (F)