Microbial biodegradation of wastewater occurs PRIMARILY during
a. primary treatment.
b. secondary treatment.
c. tertiary treatment.
d. all stages of treatment.
Answer: B
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What does DNA ligase do?
a. breaks the hydrogen bonds between base pairs b. seals gaps between assembled nucleotides c. provides energy for nucleotide assembly d. acts as an initiator to start the replication process e. seals the ends of the replicated DNA molecule
Which of the following is NOT part of the active transport process?
A) Plasma membrane B) Transporter proteins C) ATP D) Cell wall E) None of the above
The mitral valve ____
a. lies between the left and right ventricles b. is found on the right side of the heart c. prevents blood from back flowing into the aorta d. lies between the left atrium and left ventricle e. closes when the left ventricle relaxes
The disease osteoporosis involves loss of both mineral and organic components from bones. Factors that may contribute to the development of osteoporosis include
_____ prolonged disuse of muscles. _____ lack of calcium and vitamin D in the diet. _____ excess fat in the diet. _____ a decline in estrogen following menopause in women. _____ a history of extreme sport participation.