In the absence of retroviruses, eukaryotes may also undergo reverse transcription if which of the following is present?
A) Alu
B) retrograde viruses
C) retrotransposons
D) prions
E) none of the above
C) retrotransposons
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Which of the following reactions is most likely to be exergonic? Select all correct choices
A. the synthesis of a phospholipid from glycerol and fatty acids B. the replication of DNA from free nucleotides C. the formation of cellulose from individual glucose molecules D. the digestion of protein from food into amino acids
The presence of an extra X chromosome is more likely to result in a viable human fetus than an extra copy of an autosome because:
A. expression of genes from the X chromosome is restricted to early development of females. B. the X chromosome carries few genes, so dosage is not a problem. C. the X and the Y chromosomes do not recombine along most of their length. D. the X chromosome is the "female" chromosome. E. None of the above F. All of the above
Changing your view of reality involves a paradigm shift
__________________ Indicate whether the statement is true or false.
You look outside and realize that your grass needs to be mowed. You pick up the container of gasoline and see that you have approximately a third of a gallon left. You hypothesize that this amount will be enough to mow your entire lawn. Unfortunately, half way through mowing your lawn you run out of gasoline. You grumble and think to yourself that the next time you mow the lawn, you hypothesize that you will need to have at least two-thirds of a gallon of gasoline available. How did the results of your lawn-mowing experience influence the validity of your new hypothesis for future gasoline needs?
A. Your hypothesis was supported by trial and error. One more trial added to your data set. B. The hypothesis was invalidated by your experimental evidence. C. Your prediction of future gas needs is based on experimental data and therefore increases the validity of your hypothesis. D. Your prediction proved that your hypothesis is correct.