Energy in Living Systems

What are the two main types of reactions involved in energy conversion within a cell?

• Addition and subtraction reactions

• Oxidation and reduction reactions

• Synthesis and decomposition reactions

• Acid-base reactions

1. Which compound serves as the principal electron carrier derived from vitamin B3?

• Flavin adenine dinucleotide (FAD+)

• Nicotinamide adenine dinucleotide (NAD+)

• Adenosine triphosphate (ATP)

• Adenosine monophosphate (AMP)

How are oxidation and reduction reactions collectively referred to?

• Synthesis reactions

• Redox reactions

• Decomposition reactions

• Hydrolysis reactions

What is the reduced form of nicotinamide adenine dinucleotide (NADH) after accepting two electrons and a proton?

• NAD+

• FAD+

• NADH

• NADP

Why is ATP often called the "energy currency" of the cell?

• It can only be used in muscle contraction.

• It stores energy safely in the cell.

• It removes energy from the cell.

• It functions as a reducing agent.

What happens when ATP is broken down by the removal of its terminal phosphate group?

• Energy is released

• Energy is stored

• DNA synthesis occurs

• Muscle proteins are formed

How is the third phosphate group added to adenosine diphosphate (ADP) to regenerate adenosine triphosphate (ATP)?

• Dehydration synthesis

• Hydrolysis

• Phosphorylation

• Reduction reaction

Which of the following cellular processes requires ATP?

• Passive transport

• Active transport

• Diffusion

• Osmosis

What does ATP stand for?

• Adenine Tripeptide

• Adenosine Triphosphate

• Adrenaline Turnpike

• Adrenaline Transportation

How many phosphates does ATP have?

• 1

• 2

• 3

• 4