The replacement electrons for the reaction center of photosy…

The replacement electrons for the reaction center of photosystem II come from    A) photosystem I                                                                                                                                                           B) H2O                                                                                                                                                                               C) glucose                                                                                                                                                                   D) O2                                                                                                                                                             E) NADPH   

Which of the following is CORRECT regarding the viral envelo…

Which of the following is CORRECT regarding the viral envelope?A) It contains only viral proteins.B) It contains only host cell proteins.C) It is composed of sterols.D) It is composed of cellular phospholipid membrane, cellular and viral proteins.E) It is composed of sterols and viral proteins only.

Semiconservative DNA replication means thatA) each daughter…

Semiconservative DNA replication means thatA) each daughter DNA molecule is composed of one original strand and one new strand.B) nucleotides are constantly being recycled as cells make DNA.C) the cell can proofread its newly synthesized DNA only part of the time.D) the sequence of a DNA molecule is preserved as it is being replicated.E) each strand of a double-stranded DNA molecule is replicated differently.

Which of the following statements concerning transcription i…

Which of the following statements concerning transcription in bacteria is TRUE? A) It occurs in the nucleus. B) Sigma factors are not required for RNA polymerase to tightly bind the promoter regions.      C) Termination is either self-induced via hairpin loop or due to the presence of Rho protein. D) Gyrase, helicase and ligase are additional enzymes required in addition to RNA polymerase.