Question

1. a diagram of a process that occurs during one of the stages of the cell cycle is shown. dna polymerase dna helicase 5 3 3 5 which answer - choice best identifies the process illustrated and the stage of the cell cycle in which it occurs? a process cell cycle stage replication interphase b process cell cycle stage protein synthesis prophase c process cell cycle stage crossing - over metaphase d process cell cycle stage cytokinesis anaphase 2. there are many different enzymes located in the cytoplasm of a single cell. how is a specific enzyme able to catalyze a specific reaction? a different enzymes are synthesized in specific areas of the cytoplasm. b most enzymes can catalyze many different reactions. c an enzyme binds to a specific substrate (reactant) for the reaction catalyzed. d enzymes are transported to specific substrates (reactants) by ribosomes. 3. rennin is an enzyme that catalyzes a reaction that solidifies milk. rennin was added to three different test tubes with milk. each test tube was placed in a water bath for ten minutes. the data collected during the experiment are shown. test tube variable results 1 cold water bath few solids present in the liquid milk 2 room - temperature water bath semi - solid milk 3 hot water bath no solids, only liquid milk which statement best explains the result of test tube 3? a the enzyme changed the product. b the substrate was used up. c the enzyme was denatured. d the substrate reacted with the enzyme.

Explanation:

Question 1

The diagram shows DNA helicase unwinding DNA and DNA polymerase synthesizing new strands, which is DNA replication. DNA replication occurs during interphase of the cell - cycle.

Enzymes are highly specific in their action as they bind to a specific substrate (reactant) for the reaction they catalyze. This is due to the unique shape of the enzyme's active - site that fits only a particular substrate.

Enzymes are proteins and their activity is affected by temperature. High temperatures can cause enzymes to denature, losing their three - dimensional structure and thus their catalytic activity. In test tube 3 with the hot water bath, the renin enzyme was denatured, which is why no solidification of milk occurred.

Answer:

A. Process: Replication, Cell Cycle Stage: Interphase

Question 2