Question 1

What is the main function of carbohydrates in living organisms?

Accepted Answer

Provide energy for cellular activities

Answer

Support the structure of cell membranes

Answer

Facilitate muscle contraction

Answer

Assist in the production of hormones

Question 2

What is the function of lipids in living organisms?

Accepted Answer

Store energy and provide insulation

Answer

Transport oxygen in the blood

Answer

Help build proteins

Answer

Facilitate nerve transmission

Question 3

Which molecule is responsible for carrying genetic information?

Accepted Answer

DNA

Answer

Carbohydrate

Answer

RNA

Answer

Protein

Question 4

What is the primary function of proteins in living organisms?

Accepted Answer

Catalyzing chemical reactions and providing structural support

Answer

Transporting oxygen in the blood

Answer

Regulating body temperature

Answer

Storing and transmitting genetic information

Question 5

What is the function of enzymes in biochemical reactions?

Accepted Answer

Speed up chemical reactions

Answer

Anchor cells together in tissues

Answer

Store and transmit genetic information

Answer

Form a protective barrier around cells

Question 6

Which organelle is responsible for generating energy in a cell?

Accepted Answer

Mitochondria

Answer

Endoplasmic reticulum

Answer

Golgi apparatus

Answer

Nucleus

Question 7

What is the function of chlorophyll in plant cells?

Accepted Answer

Facilitate photosynthesis

Answer

Regulate water balance

Answer

Store nutrients for future use

Answer

Protect the cell from pathogens

Question 8

Which molecule is responsible for storing and transmitting genetic information?

Accepted Answer

DNA

Answer

Protein

Answer

Carbohydrate

Answer

RNA

Question 9

Which of the following is the main function of lipids in the human body?

Accepted Answer

Store energy and provide insulation

Answer

Conduct nerve impulses

Answer

Maintain fluid balance

Answer

Build bones and teeth

Question 10

What is the primary role of carbohydrates in the body?

Accepted Answer

Provide energy

Answer

Regulate body temperature

Answer

Carry oxygen in the blood

Answer

Build muscles

Question 11

Which of the following is a function of proteins in the human body?

Accepted Answer

Catalyze chemical reactions

Answer

Provide structural support to cells

Answer

Transport oxygen in the blood

Answer

Store energy for later use

Question 12

Which of the following is a characteristic of enzymes in biochemical reactions?

Accepted Answer

They lower the activation energy

Answer

They increase the pH level

Answer

They convert lipids into carbohydrates

Answer

They store genetic information

Question 13

Which of the following is true about DNA?

Accepted Answer

It contains the genetic information of an organism

Answer

It is composed of amino acids

Answer

It is responsible for protein synthesis

Answer

It is primarily found in the cytoplasm of cells

Question 14

What is the main function of the respiratory system in the human body?

Accepted Answer

Facilitate gas exchange

Answer

Break down food and absorb nutrients

Answer

Regulate body temperature

Answer

Detect and transmit sensory information

Question 15

Which of the following is the primary function of the circulatory system?

Accepted Answer

Transport nutrients, oxygen, and hormones

Answer

Maintain body temperature

Answer

Coordinate movement and balance

Answer

Filter waste from the body

Question 16

Which of the following is the correct sequence of the steps involved in cellular respiration?

Accepted Answer

Glycolysis, Krebs cycle, Electron transport chain

Answer

Krebs cycle, Electron transport chain, Glycolysis

Answer

Glycolysis, Electron transport chain, Krebs cycle

Answer

Electron transport chain, Krebs cycle, Glycolysis

Question 17

Which of the following is the primary function of the excretory system?

Accepted Answer

Remove waste products from the body

Answer

Produce hormones for growth and development

Answer

Detect and transmit sensory information

Answer

Digest and absorb nutrients from food

Question 18

Which of the following is the primary function of the nervous system?

Accepted Answer

Coordinate and control body activities

Answer

Break down food and absorb nutrients

Answer

Produce and release hormones

Answer

Pump blood throughout the body

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