Why do scientists hypothesize that RNA was the first form of genetic material?
A. RNA can store genetic information and form membranes.
B. RNA can store genetic information.
C. RNA can catalyze reactions.
D. RNA can catalyze reactions and store genetic information.
E. RNA can catalyze reactions and form membranes.
D. RNA can catalyze reactions and store genetic information.
You might also like to view...
Which of the following enzymes unwind and open the DNA double helix at the start of DNA replication?
a. DNA Polymerase b. Telomerase c. Helicase d. DNA Ligase
Research on conditions that are relatively new to human populations such as myopia, breast cancer, and obesity support the conclusion that ________
A) human populations have accumulated a number of mutations that have become fixed by genetic drift B) the changes in human lifestyle account for all of the increase in frequencies of these conditions C) these conditions are indeed "diseases of civilization" and are likely caused by the interaction between genes (genetic susceptibility) and novel environments D) these human conditions are mere artifacts of the way in which they have been evaluated
Which cells complete their maturation in the thymus gland?
a. T cytotoxic cells only b. T helper cells only c. B cells only d. Both T cytotoxic and T helper cells e. T cytotoxic cells, T helper cells, and B cells
Decaying vegetation, such as piles of leaves and compost matter, allows growth and transmission of
A. Cryptococcus. B. Dermatophytes. C. Pneumocystis. D. Aspergillus. E. Candida.