Which of the following STDs are preventable through the use of a vaccine?
A. hepatitis A and HIV
B. syphilis and vaginal infections
C. HIV and gonorrhea
D. hepatitis A and B
E. hepatitis B and chlamydia
Answer: D
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In the lactose operon, the repressor gene binds to:
A. the lacI coding region. B. the promoter. C. the operator. D. the lacZ coding sequence. E. the lacY coding sequence.
As activity level and metabolic rate increase, ____ is generated as a consequence of the second law of thermodynamics
Fill in the blank with the appropriate word.
Analysis of a certain polymer shows that it contains phosphate groups, ribose groups, and pyrimidines
Based on this information, which of the following is the best description of this compound? a. It is most likely ribonucleic acid. b. It is DNA. c. It is an inorganic compound. d. It contains thymine. e. It is a polypeptide
Three major types of RNAs are mRNA, rRNA, and tRNA. For each of the conditions below, predict the consequences in terms of the population of proteins being synthesized in a particular cell and the effects on individual proteins
(a) An acridine dye—induced mutation (adds or deletes single bases in DNA) leads to an mRNA for one protein-producing gene. The condition is heterozygous in the involved cell. (b) A deletion (homozygous) that removes approximately half of the rRNA genes. What will be an ideal response?