Metabolism

Question 1

What is metabolism?

Answer 1

Metabolism is the sum of all chemical reactions that occur within a living organism to maintain life.

Question 2

True or False: Metabolism consists of only catabolic reactions.

Answer 2

False

Question 3

What are the two main types of metabolic pathways?

Answer 3

Catabolic and anabolic pathways.

Question 4

Fill in the blank: Catabolic pathways are involved in the ________ of complex molecules.

Answer 4

breakdown

Question 5

What is an anabolic pathway?

Answer 5

An anabolic pathway is a metabolic pathway that constructs molecules from smaller units, requiring energy.

Question 6

Which molecule is commonly known as the energy currency of the cell?

Answer 6

ATP (adenosine triphosphate)

Question 7

True or False: Enzymes speed up metabolic reactions by lowering the activation energy.

Answer 7

True

Question 8

What role do enzymes play in metabolism?

Answer 8

Enzymes act as catalysts that speed up biochemical reactions involved in metabolism.

Question 9

What is the primary function of the citric acid cycle?

Answer 9

To generate energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.

Question 10

Multiple Choice: Which of the following is NOT a product of glycolysis? A) ATP B) NADH C) Oxygen D) Pyruvate

Answer 10

C) Oxygen

Question 11

What is the process of converting glucose to pyruvate called?

Answer 11

Glycolysis

Question 12

Fill in the blank: The ________ is the site of cellular respiration in eukaryotic cells.

Answer 12

mitochondria

Question 13

True or False: Photosynthesis is part of the anabolic metabolism.

Answer 13

True

Question 14

What is the main purpose of photosynthesis?

Answer 14

To convert solar energy into chemical energy stored in glucose.

Question 15

What are the two stages of photosynthesis?

Answer 15

Light-dependent reactions and the Calvin cycle.

Question 16

Multiple Choice: Which molecule is a byproduct of cellular respiration? A) Glucose B) Water C) Oxygen D) Carbon Dioxide

Answer 16

B) Water

Question 17

What is the function of coenzymes in metabolic reactions?

Answer 17

Coenzymes assist enzymes by carrying chemical groups or electrons.

Question 18

Fill in the blank: The ________ pathway is a series of reactions that produce glucose from non-carbohydrate sources.

Answer 18

gluconeogenesis

Question 19

What is the main energy source for cells?

Answer 19

Glucose

Question 20

True or False: Lipids can be broken down to produce ATP.

Answer 20

True

Question 21

What is the primary function of the pentose phosphate pathway?

Answer 21

To generate NADPH and ribose-5-phosphate for nucleotide synthesis.

Question 22

What is metabolism’s relationship with homeostasis?

Answer 22

Metabolism helps maintain homeostasis by regulating energy balance and nutrient levels.

Question 23

Multiple Choice: Which hormone increases blood glucose levels? A) Insulin B) Glucagon C) Somatostatin D) Cortisol

Answer 23

B) Glucagon

Question 24

What is the term for the total amount of energy used by an organism in a given time period?

Answer 24

Metabolic rate

Question 25

Fill in the blank: The ________ cycle is a series of enzymatic reactions that oxidizes acetyl-CoA to produce energy.

Answer 25

Krebs