The tRNA bases called the codon are complementary to three consecutive nucleotides on an mRNA molecule?
a. true
b. false
Ans: b. false
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From its ground state, PSII can __________
A. pull electrons from H2O B. pull protons from H2O C. pass electrons to PSI D. absorb light energy E. emit light energy
A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase, which functions in the metabolism of phenylalanine, with known database sequences. Which of the following should provide the closest match?
A. green pufferfish B. zebrafish C. chicken D. orangutan E. fruit fly
Which molecule would be an indicator of fungal contamination in a drug preparation?
A. Cellulose B. Collagen C. Chitin D. Deoxyribose E. Lignin Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about fungi? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A reason or reasons given by scientists as to why viruses are not considered living organisms include:
a. Viruses do not contain genetic information b. Viruses do not reproduce on their own c. Viruses are all smaller than the smallest known cells d. Viruses do not contain a nucleus e. Viruses can be frozen and still survive