Damage to ________ greatly reduces a cell's ability to repair DNA during DNA replication
A) mutator genes
B) proto-oncogenes
C) repair genes
D) structural genes
E) somatic genes
A
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What is the purpose of the cilia and flagella of cells?
a. They generate the cell’s metabolism. b. They provide movement for the cell. c. They help maintain homeostasis. d. They generate cell signaling. e. They contract muscles
A common feature of action potentials is that they _____
A) cause the membrane to hyperpolarize and then depolarize B) can undergo temporal and spatial summation C) are triggered by a depolarization that reaches the threshold D) move at the same speed along all axons E) require the diffusion of Na+ and K+ through ligand-gated channels to propagate
While studying eukaryotic mRNA processing, you encounter the sequence GUACACACAUGAG in the middle of a long mRNA transcript. Which statement can you make, based on your discovery?
a. This sequence will be replaced by a poly-A tail. b. This transcript will be assembled into a ribosome. c. This transcript has not yet undergone splicing. d. This is a transcript for Asparagine tRNA.
What causes the hypocotyl of dicots to
straighten? a. Light. b. Gravity. c. Wind. d. Air. e. All of these may be involved