The human genome contains about how many nucleotides?
a. 1 million
b. 3 million
c. 30 million
d. 1 billion
e. 3 billion
ANSWER: e
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Which of the following is not likely to occur if p53 is inactivated?
A) The appearance of homogenously staining regions on chromosomes B) Increased propensity to arrest in G1 C) Inhibition of the G1 to S checkpoint D) An increase in gene amplification in affected cells E) Generation of chromosomes that lack telomeres and centromeres
Stomata are:a
waxy layers that cover leaves. b. openings in the leaf epidermis. c. extensions of bundle sheaths. d. particularly numerous on the upper epidermis. e. guarded by two stipule cells.
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids?
A) to reflect more energy B) to absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot C) to give them different colors D) because plants cannot make enough chlorophyll a for all of their energy needs
Hyphae are divided into cells by ________
Fill in the blank(s) with correct word