20. The RNA sequences of some introns found in bacteria, mitochondria, chloroplasts, and some nuclear genes fold into 3-D structures that catalyze the removal of the introns. Therefore, the intron functions as a (A) ribozyme. (B) enzyme. (C) spliceosome. (D) guide.

26. A mutation occurs in a gene that encodes a G1 cyclin, such that the protein is unable to bind to its CDK. How will this affect the cell cycle? (A) The cell will be stuck in G1 and will not advance through the cell cycle. (B) The cell will replicate its DNA, but will be unable to progress through mitosis. (C) The cell will rapidly replicate its DNA and progress through mitosis, causing uncontrolled cell division, and leading to cancer. (D) The cell will proceed thru mitosis without replicating its DNA.

20. The RNA sequences of some introns found in bacteria, mitochondria, chloroplasts, and some nuclear genes fold into 3-D structures that catalyze the removal of the introns. Therefore, the intron functions as a
(A) ribozyme.
(B) enzyme.
(C) spliceosome.
(D) guide.

相關試題

相關試卷

20. The RNA sequences of some introns found in bacteria, mitochondria, chloroplasts, and some nuclear genes fold into 3-D structures that catalyze the removal of the introns. Therefore, the intron functions as a(A) ribozyme.(B) enzyme.(C) spliceosome.(D) guide.

相關試題

相關試卷

20. The RNA sequences of some introns found in bacteria, mitochondria, chloroplasts, and some nuclear genes fold into 3-D structures that catalyze the removal of the introns. Therefore, the intron functions as a
(A) ribozyme.
(B) enzyme.
(C) spliceosome.
(D) guide.