Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth
Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it? A) How can amino acids, simple sugars, and nucleotides be synthesized abiotically?
B) How did RNA sequences come to carry the code for amino acid sequences?
C) How could polymers involving lipids and/or proteins form membranes in aqueous environments?
D) How can RNA molecules act as templates for the synthesis of complementary RNA molecules?
B
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The relationship between strands of RNA and DNA during transcription is
a. antagonistic. b. opposite. c. complementary. d. an exact duplicate. e. unrelated.
Which of the following is the correct sequence of events in the origin of life?
I. formation of protobionts II. synthesis of organic monomers III. synthesis of organic polymers IV. formation of DNA-based genetic systems A) I, II, III, IV B) I, III, II, IV C) II, III, I, IV D) II, III, IV, I
During the process of ________, RuBP combines with oxygen instead of carbon dioxide
Fill in the blank(s) with correct word
Where do most ferns grow and house their spores?
a) on their rhizoids b) on their fronds c) on their antheridia d) on their gametophyte e) on their prothallus