Using the techniques of genetic engineering, you design a cytoplasmic protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to
A) do nothing; all proteins go through the ER.
B) incorporate appropriate mannose-6-phosphate groups.
C) incorporate the appropriate DNA sequence(s) to create signal sequences into mature peptide.
D) incorporate radioactive amino acids into the protein.
E) incorporate the appropriate DNA sequence(s) to create signal sequences into the mature peptide.
C) incorporate the appropriate DNA sequence(s) to create signal sequences into mature peptide.
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During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception?
A. Disuse of an organ may lead to its eventual disappearance. B. Only favorable adaptations have survival value. C. If the giraffes did not have to compete with each other, longer necks would not have been passed on to the next generation. D. Characteristics acquired during an organism's life are generally not passed on through genes. E. Spontaneous mutations can result in the appearance of new traits.
Which of the following statements, concerning an acidic solution, is false?
A) In acidic solutions, as the concentration of hydrogen ions increases the solution becomes more acidic B) In acidic solutions, any value of the pH scale above 7 is considered acidic C) Microorganisms can grow in acidic solutions
Eukaryotic RNA polymerase II synthesizes
a. 5S rRNA. b. 28S rRNA. c. mRNA. d. 18S rRNA. e. tRNAs.
_______________ is the term for differences among individuals in a population.
A. Migration B. Variation C. Gene Flow D. Macro evolution E. Microevulation