Which of the following environmental conditions does not affect the activity of enzymes?

Some enzymes require an effector to be activated or inactivated. The site to which the effector binds is the:

Why will the enzyme sucrase only act on sucrose and not bind to other disaccharides, such as maltose?

How do enzymes change the speed of chemical reactions in cells?

Which of the following is not an example of a catabolic pathway?

A battery being used in a flashlight is an example of:

Which statement is true of a cell in chemical equilibrium?

Questions 8–9

During the above reaction in glycolysis, which molecule acts as the oxidizing agent?

In the same reaction above in glycolysis, which molecule acts as the reducing agent?

Which part of photosynthesis takes place in the stroma, uses ATP and NADPH to convert CO₂ to the sugar G3P, and returns ADP and NADP⁺?

Which of the following reactions represents photosynthesis?

What color of light is least effective in driving photosynthesis?

Which of the following biological process is not a step in cellular respiration:

During which phase of cellular respiration is the most ATP produced?

Which metabolic pathway is used by cellular respiration and fermentation?

Which type of heat exchange involves the direct transfer of heat between molecules of objects in direct contact with each other?

The graph below shows the maximum reaction rate for an unknown enzyme as temperature increased. Which of the following best explains the increase in the enzymatic reaction rate?

The graph below shows the maximum reaction rates as substrate concentration increases for three conditions for an enzyme. Each reaction utilizes the same enzyme-substrate pair and the same concentration of enzymes. The three conditions are Enzyme + no inhibitor, Enzyme + non-competitive inhibitor, and Enzyme + competitive inhibitor. Which of the reactions shown in the graph represent the Enzyme + non-competitive inhibitor?

Which of the following correctly describes the role of water in the light reactions?

Early photosynthetic prokaryotes, such as cyanobacteria, played a crucial role in shaping Earth’s atmosphere by:

Mitochondrial uncoupling protein 1 (UCP1) uncouples aerobic respiration in mammals by creating a pore in the inner mitochondrial membrane.  Which of the following best describes the effect of UCP1?

Electron Transport systems that lead to the production of a proton gradient occur

What is the primary purpose of lactic acid fermentation in human muscle cells during strenuous exercise?

The flow of energy in photosynthesis starts with solar energy and follows the following path(s). Select all that apply.

The following molecules are all reactants and or products of cellular respiration. Place them in order of highest chemical potential energy to lowest. ATP, NADH, glucose, carbon dioxide, pyruvate.

Which of the following best describes how a disease increasing the leakiness of the inner mitochondrial membrane would affect cellular respiration?

Which of the following statements correctly compares the location of electron transport chain (ETC) reactions in different types of organisms and organelles?

Which of the following best explains why metabolic pathways consist of a series of sequential, enzyme-catalyzed steps rather than a single, one-step reaction?

Catabolic reactions break down complex molecules into simpler molecules, increasing entropy. Anabolic reactions generate complex molecules resulting in a decrease in entropy. Which of the following best describes the energetic relationship between catabolic and anabolic pathways in a cell?

Methanol, when ingested, is metabolized by the enzyme alcohol dehydrogenase into formaldehyde, which is highly toxic and can cause blindness and death.In cases of methanol poisoning, intravenous ethanol is administered. Ethanol has a higher affinity for alcohol dehydrogenase than methanol. By flooding the system with ethanol, the enzyme binds to ethanol more frequently, slowing down the conversion of methanol to formaldehyde, allowing the kidneys to excrete the unmetabolized methanol safely. Which of the following explains the role of ethanol in the treatment of methanol poisoning?