SS3 Third Term Biology Past Questions And Answers

Whether you’re a dedicated student, a curious learner, or someone simply captivated by the wonders of life, these questions are sure to challenge and inspire. Are you ready to test your understanding and unravel the mysteries of the biological realm? Let’s dive in!

 

What is the main function of the rough endoplasmic reticulum in a cell?

a) Lipid synthesis

b) Protein synthesis

c) Carbohydrate synthesis

d) Energy production

 

Answer: b) Protein synthesis

 

Which part of the human brain is responsible for learning and memory?

a) Cerebrum

b) Cerebellum

c) Hippocampus

d) Amygdala

 

Answer: c) Hippocampus

 

What is the process by which DNA is copied during cell division?

a) Replication

b) Transcription

c) Translation

d) Mutation

 

Answer: a) Replication

 

In the nitrogen cycle, what role do bacteria play?

a) Fixing nitrogen

b) Absorbing nitrogen

c) Releasing nitrogen

d) Converting nitrogen to oxygen

 

Answer: a) Fixing nitrogen

 

Which type of biomolecule includes enzymes, hormones, and antibodies?

a) Proteins

b) Carbohydrates

c) Lipids

d) Nucleic acids

 

Answer: a) Proteins

 

What is the role of the pituitary gland in the endocrine system?

a) Producing insulin

b) Regulating metabolism

c) Controlling growth and development

d) Maintaining water balance

 

Answer: c) Controlling growth and development

 

What is the function of the stomata in plant leaves?

a) Absorbing sunlight

b) Exchanging gases

c) Synthesizing glucose

d) Storing water

 

Answer: b) Exchanging gases

 

Which blood vessel carries oxygenated blood away from the heart to the body?

a) Vein

b) Artery

c) Capillary

d) Venule

 

Answer: b) Artery

 

What is the purpose of the Calvin cycle in photosynthesis?

a) Production of glucose

b) Absorption of sunlight

c) Release of oxygen

d) Conversion of ATP to ADP

 

Answer: a) Production of glucose

 

In ecological succession, what type of plant species typically colonizes a barren area first?

a) Climax species

b) Pioneer species

c) Keystone species

d) Indicator species

 

Answer: b) Pioneer species

 

What is the role of the adrenal glands in the human body?

a) Regulating blood sugar

b) Producing adrenaline

c) Filtering blood

d) Balancing electrolytes

 

Answer: b) Producing adrenaline

 

Which process is responsible for the movement of water across a semipermeable membrane?

a) Osmosis

b) Active transport

c) Diffusion

d) Filtration

 

Answer: a) Osmosis

 

What is the function of the cornea in the human eye?

a) Focusing light

b) Detecting color

c) Producing tears

d) Controlling pupil size

 

Answer: a) Focusing light

 

What is the purpose of the Krebs cycle in cellular respiration?

a) Production of ATP

b) Breakdown of glucose

c) Release of carbon dioxide

d) Oxidation of fatty acids

 

Answer: c) Release of carbon dioxide

 

In genetics, what term describes the physical appearance of an organism?

a) Genotype

b) Phenotype

c) Allele

d) Homozygous

 

Answer: b) Phenotype

 

Which organelle is responsible for detoxifying drugs and poisons in liver cells?

a) Lysosome

b) Peroxisome

c) Golgi apparatus

d) Smooth endoplasmic reticulum

 

Answer: b) Peroxisome

 

What is the function of the trachea in the respiratory system?

a) Oxygen exchange

b) Filtering air

c) Transporting air to the lungs

d) Gas diffusion

 

Answer: c) Transporting air to the lungs

 

What is the primary function of the nucleolus in a cell?

a) Protein synthesis

b) DNA replication

c) Ribosome assembly

d) Lipid production

 

Answer: c) Ribosome assembly

 

What is the role of the enzyme catalase in cells?

a) Breaking down proteins

b) Breaking down lipids

c) Breaking down hydrogen peroxide

d) Synthesizing DNA

 

Answer: c) Breaking down hydrogen peroxide

 

Which ecological concept refers to the maximum population size that an environment can support?

a) Carrying capacity

b) Biotic potential

c) Population density

d) Ecological footprint

 

Answer: a) Carrying capacity