In what ways can riboswitches function?
What will be an ideal response?
Ans: A riboswitch may assume alternate base-pairing configurations (with the presence of a ligand or an environmental change) that affect translation of an mRNA. It can be a ribozyme, or it can interfere with ribosome binding.
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The Golgi complex ____
a. receives proteins made in the rough ER and chemically modifies them b. synthesizes proteins for export from the cell c. stores nucleic acids d. synthesizes lipids e. stores ribosomes
What is the ultimate source of all diversity?
A) natural selection B) sexual recombination C) meiosis D) mutation
Reiji Okazaki discovered that "Okazaki fragments" are produced during DNA replication. What are Okazaki fragments?
a. short lengths of new DNA on the leading strand b. RNA primers on both the lagging and leading strand c. RNA primers on the lagging strand d. short lengths of new DNA on the lagging strand
When chromosomes become visible during prophase of mitosis, it is the result of
A) uncoiling. B) condensation. C) DNA synthesis. D) addition of proteins to the DNA. E) chromatid duplication.