Which of the following statements concerning enzymes is FALSE?
a. Each enzyme has an optimal temperature.
b. Each enzyme has an optimal pH.
c. Most enzymes are highly specific.
d. Some enzymes require cofactors.
e. Most enzymes are RNA molecules
E
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Which of the following triggers flowering for plants sensitive to photoperiod?
A) temperature B) night length C) day length D) intensity of sunlight
If a parent cell has 16 chromosomes, how many sister chromatids will be present after duplication of the chromosomes?
A) 16 B) 64 C) 4 D) 8 E) 32
Researchers first discovered the existence of hormones by studying secretions from the ________.
A. adrenal glands B. pancreas C. gonads D. thymus gland E. pineal gland
The hypodermis is composed of ____.
A. adipose and nervous tissues B. connective and adipose tissues C. blood and lymphatic vessels D. hair follicles and sweat glands E. sebaceous and sweat glands