Formalin (37% formaldehyde) is used for
A. antisepsis.
B. disinfection.
C. sterilization.
D. sanitization.
E. both disinfection and sterilization.
Answer: E
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When the nontemplate strand of a gene is transcribed into RNA, what is likely to result?
A) A complementary sRNA will bind to it and form a functional ribozyme with secondary structure. B) It will complementary bind to the gene sequence, form a hairpin loop, and transcriptionally repress the gene. C) The complementary mRNA also transcribed from the template strand will bind to it and halt its translation. D) A global regulator will identify this as a stress, respond by inducing ribonuclease production, and it will degraded.
What is the most common form in which the products of photosynthesis circulate from cell to cell in vascular plants?
a. glucose b. sucrose c. cellulose d. fructose e. amylose
Supralittoral isopods
a. must have some salt water cover daily. b. would drown if placed in water. c. return to the sea to lay eggs. d. have pseudogills. e. prey on barnacles.
What happens first following a neuron
stimulation? a. Sodium ions enter the cell. b. Sodium ions leave the cell. c. Potassium ions enter the cell. d. Potassium ions leave the cell. e. Potassium ions are involved in positive feedback.