Which of the following is NOT true about the discovery of DNA structure by Watson and Crick?
a. From the structure of DNA, it was clear how genes encoded information for proteins.
b. Determining the structure of DNA almost immediately revealed how chromosomes duplicate.
c. X-ray pictures of DNA were helpful in deducing its structure.
d. Hydrogen bonds were shown to hold the two strands of DNA together.
e. Because of base pairing, there always is an equal number of G and C, and A and T.
Ans: a. From the structure of DNA, it was clear how genes encoded information for proteins.
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Consider the metabolic repertoire of prokaryotes and the diverse environments in which they can thrive to answer the following questions
Autotrophs produce carbohydrates by reducing CO2 whereas heterotrophs synthesize carbohydrates by reducing preformed organic compounds like glucose. A. true B. false
If a fungal colony is described as rugose, then it means that the colony:
a. is furrowed or convoluted. b. is slightly raised in the center. c. furrows radiate out from the center. d. has a smooth surface with no aerial myce-lium.
Based on Figure 18-11, the two present day continents that should have the most closely related plant
and animal species are:a.
North and South America.
b. Africa and Australia.
c. Africa and South America.
d. Australia and India.
e. Eurasia and India
During times of stress, the autonomic nervous system causes the afferent and efferent arterioles to constrict, resulting in an increase in the amount of urine produced
Indicate whether the statement is true or false