Cancer causing genes found in some viruses are called:
A. oncogenes.
B. proto-oncogenes.
C. tumor suppressor genes.
D. viral genes.
A
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If we think of the DNA double helix as a twisted ladder, what makes up the rungs or steps of the ladder?
A. phosphate groups only B. alternating phosphate groups and sugars C. sugars only D. purines and pyrimidines E. phosphate groups and bases
The type of transport ATPase found in bacteria, mitochondria, and chloroplasts are the ________ ATPases.
Fill in the blank(s) with the appropriate word(s).
A phenotype:
a) does not reveal the heritability of traits. b) consists of the observable properties of an individual. c) does not include an organism's behavior. d) cannot change during the course of an organism's life. e) depends on the genome rather than the environment.
Which statement about fungi and plant disease is most accurate?
A) About equal numbers of plant diseases are caused by fungi and bacteria. B) Far more plant diseases are caused by fungi than bacteria. C) Viruses cause more plant diseases than fungi. D) Fungi rarely cause diseases.