#1
What is the primary function of DNA?
Energy production
Protein synthesis
Cell structure
Respiration
#2
Which organelle is known as the 'powerhouse' of the cell?
Endoplasmic reticulum
Mitochondrion
Nucleus
Golgi apparatus
#3
What is the role of chlorophyll in photosynthesis?
Absorbing carbon dioxide
Absorbing sunlight
Absorbing water
Absorbing oxygen
#4
Which of the following is a function of the circulatory system?
Breathing
Transporting nutrients
Filtering waste
Digesting food
#5
Which of the following is a characteristic of prokaryotic cells?
Nucleus present
Membrane-bound organelles
Single-cellular
Large size
#6
What is the function of the Golgi apparatus in the cell?
Protein synthesis
Energy production
Modification and packaging of proteins
DNA replication
#7
What is the role of ribosomes in a cell?
Energy production
Protein synthesis
DNA replication
Cellular respiration
#8
What is the process by which plants make their own food using sunlight?
Cellular respiration
Photosynthesis
Transpiration
Fermentation
#9
Which of the following is a function of the nervous system?
Transportation of oxygen
Digestion of food
Control of body movements
Pumping blood
#10
What is the function of the enzyme amylase?
Breaking down proteins
Breaking down lipids
Breaking down carbohydrates
Breaking down nucleic acids
#11
Which type of tissue connects muscles to bones?
Adipose tissue
Epithelial tissue
Connective tissue
Nervous tissue
#12
What is the name of the process by which cells divide to form new cells?
Mitosis
Meiosis
Cytokinesis
Apoptosis
#13
Which structure in the respiratory system is responsible for gas exchange in the lungs?
Bronchi
Alveoli
Trachea
Diaphragm
#14
Which of the following is a nitrogenous base found in DNA?
Uracil
Thymine
Cytosine
Adenine
#15
What is the smallest unit of life?
#16
What is the role of RNA in protein synthesis?
Transporting amino acids
Providing energy
Carrying genetic information
Building cell membranes
#17
Which hormone is responsible for regulating blood sugar levels?
Insulin
Adrenaline
Estrogen
Thyroxine
#18
In which phase of the cell cycle does DNA replication occur?
G1 phase
G2 phase
S phase
M phase
#19
What is the function of white blood cells in the immune system?
Transporting oxygen
Fighting infections
Digesting food
Producing antibodies
#20
Which gas is exchanged during respiration in humans?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
#21
What is the function of the pancreas in the digestive system?
Producing bile
Absorbing nutrients
Digesting carbohydrates
Producing digestive enzymes