Protein synthesis on the primordial earth may have been catalyzed by ____ before the evolution of

enzymes.
a. DNA
b. carbohydrates
c. amino acids
d. RNA
e. lightning


D

Biology & Microbiology

You might also like to view...

Match the following items to the correct phrase.

_______1. Viruses that infect bacteria and cause the lytic cycle to occur. _______2. Term meaning complete viral particles. _______3. Are known to cause some plant diseases, but no animal diseases. _______4. Infectious protein molecules. _______5. Infectious molecules of RNA. _______6. Cause diseases such as Creutzfeldt-Jacob disease, “mad cow disease,” and “scrapie.” a. viroids b. virions c. prions d. temperate phages e. virulent phages

Biology & Microbiology

Which of the following best describes basal angiosperms?

a. a group of seed plants that exhibit traits of monocots and dicots b. a group of seedless plants that produce large fronds and cones c. a group of plants in which a network of cells transport water d. a group of plants that lack vascular tissue for transporting nutrients

Biology & Microbiology

Many primate adaptations are a response to

living in

a. warm climates. b. trees. c. underground burrows. d. deserts. e. grasslands

Biology & Microbiology

A large number of the genes shared by bacteria and Archaea produce proteins that are involved in ________ ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology