UNIT 6

Multiple Choice

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.

Multiple Choice

What is metabolism and why is it important for organisms?

• It refers to the chemical reactions in organisms

• It is the process of energy generation from food

• It allows maintenance of normal functions and survival

• All of the above

Multiple Choice

Which of the following processes could be described as catabolism?

• The production of polypeptides from amino acids by the action of enzymes.

• The synthesis of glycogen in the liver from glucose.

• The digestion of starch into maltose in digestion.

• The production of a large DNA molecule from nucleotide monomers.

Multiple Choice

What are the two main processes of metabolism illustrated in the image?

• Catabolism

• Anabolism

• Photosynthesis

• Respiration

Open Ended

What are oxidation/reduction reactions?

Multiple Choice

Which metal is most easily oxidized?

• Co

• Ag

• Cu

• Mg

Multiple Choice

Oxidation is the… (Higher Tier Question)

• loss of electrons

• gain of electrons

• loss of protons

• gain of protons

Multiple Choice

What is the difference between reduction and oxidation in terms of electron transfer?

• Reduction involves losing electrons

• Oxidation involves gaining electrons

• Reduction involves gaining electrons

• Oxidation involves losing protons

Multiple Choice

Redox reactions (reduction and oxidation reactions) pertain to the movement of what subatomic particle between atoms or molecules?

• Electrons

• Protons

• Neutrons

• Centrons

Open Ended

What are the real-life applications of redox reactions?

Multiple Choice

What are the reactants (what is needed) for photosynthesis?

• glucose and oxygen
• light, water, and carbon dioxide

Multiple Choice

Which of the following is the correct sequence of stages in cellular respiration?

• Glycolysis $$\rightarrow$$ Krebs cycle $$\rightarrow$$ Electron transport chain

• Krebs cycle $$\rightarrow$$ Glycolysis $$\rightarrow$$ Electron transport chain

• Electron transport chain $$\rightarrow$$ Glycolysis $$\rightarrow$$ Krebs cycle

• Glycolysis $$\rightarrow$$ Electron transport chain $$\rightarrow$$ Krebs cycle

Multiple Choice

What are the products of glycolysis from one molecule of glucose?

• 2 ATP

• 2 NADH

• 2 pyruvate

• 2 ADP

Multiple Choice

What are the main products of the redox reactions in the Krebs cycle?

• ATP

• NADH

• FADH2

• CoA

Multiple Choice

This image shows oxidative phosphorylation, which is made of two steps. These steps are...

• ETC and chemiosmosis

• chemiosmosis and the Krebs Cycle

• ATP Synthase and Glycolysis

• Calvin Cycle and ETC

Multiple Choice

Examine the diagram of the electron transport chain below. Why do protons move through ATP synthase? Hint: how does diffusion work?

• The protons move to an area of lower concentration.

• The protons prefer to be in the cell's cytoplasm.

• The protons need to enter the matrix to produce oxygen.

Multiple Choice

What are the two main processes shown in the equations for photosynthesis?

• Oxidation of water and reduction of CO2

• Oxidation of CO2 and reduction of water

• Oxidation of glucose and reduction of oxygen

• Oxidation of hydrogen and reduction of carbon

Multiple Choice

What are free radicals and why are they considered very reactive?

• Atoms with paired electrons

• Uncharged atoms or molecules with unpaired electrons

• Charged molecules

• Stable molecules

Multiple Choice

What are free radicals and how do they affect the body?

• They are beneficial for health

• They can cause damage

• They are a type of antioxidant

• They have no effect on the body

Multiple Choice

What role do antioxidants play in counteracting free radicals in the body?

• They donate protons

• They donate electrons

• They absorb free radicals

• They produce free radicals

Multiple Choice

What role do antioxidants play in relation to free radicals?

• They donate protons to free radicals

• They donate electrons to free radicals

• They neutralize free radicals by absorbing them

• They create more free radicals

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident