biology paper 1 exam questions

Question 1

What is the basic unit of life?

Answer 1

Cell

Question 2

True or False: DNA is made up of amino acids.

Answer 2

False

Question 3

Fill in the blank: The process by which plants make their own food is called __________.

Answer 3

Photosynthesis

Question 4

What is the function of the ribosomes?

Answer 4

Protein synthesis

Question 5

Multiple Choice: Which of the following is NOT a part of the cell theory? A) All living things are made of cells B) Cells are the basic unit of life C) All cells have a nucleus D) All cells arise from pre-existing cells.

Answer 5

C) All cells have a nucleus

Question 6

What is the role of mitochondria in a cell?

Answer 6

Energy production

Question 7

True or False: The nucleus contains the cell’s genetic material.

Answer 7

True

Question 8

Fill in the blank: The __________ is responsible for controlling the movement of substances in and out of the cell.

Answer 8

Cell membrane

Question 9

What type of cell division produces gametes?

Answer 9

Meiosis

Question 10

Multiple Choice: Which of the following processes occurs in the mitochondria? A) Photosynthesis B) Glycolysis C) Krebs cycle D) Fermentation.

Answer 10

C) Krebs cycle

Question 11

What is the primary function of chloroplasts?

Answer 11

Photosynthesis

Question 12

True or False: Prokaryotic cells do not have a nucleus.

Answer 12

True

Question 13

Fill in the blank: __________ are the building blocks of proteins.

Answer 13

Amino acids

Question 14

What is the function of the endoplasmic reticulum?

Answer 14

Protein and lipid synthesis

Question 15

Multiple Choice: Which type of RNA carries the genetic information from the nucleus to the ribosome? A) tRNA B) rRNA C) mRNA D) miRNA.

Answer 15

C) mRNA

Question 16

What is a mutation?

Answer 16

A change in the DNA sequence

Question 17

True or False: Enzymes are consumed in chemical reactions.

Answer 17

False

Question 18

Fill in the blank: The __________ is the part of the brain responsible for regulating heartbeat and breathing.

Answer 18

Medulla oblongata

Question 19

What is the role of neurotransmitters?

Answer 19

Transmit signals across synapses

Question 20

Multiple Choice: Which part of the neuron receives signals? A) Axon B) Dendrites C) Cell body D) Myelin sheath.

Answer 20

B) Dendrites

Question 21

What is homeostasis?

Answer 21

The maintenance of a stable internal environment

Question 22

True or False: The endocrine system uses hormones to communicate.

Answer 22

True

Question 23

Fill in the blank: The __________ is the functional unit of the kidney.

Answer 23

Nephron

Question 24

What is the function of the liver?

Answer 24

Detoxification and metabolism

Question 25

Multiple Choice: Which organ is primarily responsible for gas exchange? A) Heart B) Lungs C) Kidneys D) Liver.

Answer 25

B) Lungs

Question 26

What is the primary component of blood that carries oxygen?

Answer 26

Hemoglobin

Question 27

True or False: All viruses are considered living organisms.

Answer 27

False

Question 28

Fill in the blank: __________ is the process by which cells obtain energy from glucose.

Answer 28

Cellular respiration

Question 29

What is an ecosystem?

Answer 29

A community of living organisms and their environment

Question 30

Multiple Choice: Which of the following is a biotic factor? A) Temperature B) Water C) Plants D) Soil.

Answer 30

C) Plants

Question 31

What is the term for a symbiotic relationship where both species benefit?

Answer 31

Mutualism

Question 32

True or False: Primary succession occurs on previously uninhabited land.

Answer 32

True

Question 33

Fill in the blank: The __________ cycle describes the movement of water in the environment.

Answer 33

Water

Question 34

What is biodiversity?

Answer 34

The variety of life in an ecosystem

Question 35

Multiple Choice: Which of the following is a greenhouse gas? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen.

Answer 35

C) Carbon dioxide

Question 36

What is the primary cause of global warming?

Answer 36

Increased greenhouse gas emissions

Question 37

True or False: Photosynthesis releases carbon dioxide.

Answer 37

False

Question 38

Fill in the blank: __________ is the process of converting nitrogen gas into a usable form for plants.

Answer 38

Nitrogen fixation

Question 39

What is the main function of the immune system?

Answer 39

To protect the body from pathogens

Question 40

Multiple Choice: Which type of immunity is acquired through vaccination? A) Innate B) Adaptive C) Passive D) Active.

Answer 40

D) Active

Question 41

True or False: Antibodies are produced by white blood cells.

Answer 41

True

Question 42

Fill in the blank: The __________ is the largest organ in the human body.

Answer 42

Skin

Question 43

What is the role of the pancreas in digestion?

Answer 43

Produces digestive enzymes and regulates blood sugar

Question 44

Multiple Choice: Which process involves the breakdown of food into smaller molecules? A) Digestion B) Absorption C) Assimilation D) Excretion.

Answer 44

A) Digestion