SS1 First Term Biology Past Questions and Answers

Question: What is the primary function of the nucleus in a cell?

 

a) Energy production

b) Genetic information storage

c) Protein synthesis

d) Waste elimination

Answer: b) Genetic information storage

Question: Which organelle is responsible for producing ATP in a eukaryotic cell?

 

a) Nucleus

b) Mitochondria

c) Endoplasmic reticulum

d) Golgi apparatus

Answer: b) Mitochondria

Question: What is the purpose of the ribosomes in a cell?

 

a) Cellular respiration

b) Photosynthesis

c) Protein synthesis

d) Lipid synthesis

Answer: c) Protein synthesis

Question: In photosynthesis, what pigment captures light energy?

 

a) Chlorophyll

b) Carotenoids

c) Melanin

d) Hemoglobin

Answer: a) Chlorophyll

Question: Which process involves the movement of molecules from an area of high concentration to an area of low concentration?

 

a) Active transport

b) Osmosis

c) Facilitated diffusion

d) Simple diffusion

Answer: d) Simple diffusion

Question: What is the function of the cell membrane?

 

a) Energy production

b) Support and structure

c) Regulation of substances entering and leaving the cell

d) DNA storage

Answer: c) Regulation of substances entering and leaving the cell

Question: Which structure is responsible for the breakdown of cellular waste and old organelles?

 

a) Lysosome

b) Endoplasmic reticulum

c) Vacuole

d) Golgi apparatus

Answer: a) Lysosome

Question: What is the function of the Golgi apparatus?

 

a) Protein synthesis

b) Lipid synthesis

c) Modification and packaging of proteins

d) ATP production

Answer: c) Modification and packaging of proteins

Question: Which gas is primarily involved in cellular respiration?

 

a) Oxygen

b) Carbon dioxide

c) Nitrogen

d) Hydrogen

Answer: a) Oxygen

Question: What is the correct sequence of phases in the cell cycle?

 

a) G1, S, G2, M

b) G1, M, S, G2

c) S, G1, G2, M

d) M, G1, S, G2

Answer: a) G1, S, G2, M

Question: Which of the following is a function of the smooth endoplasmic reticulum?

a) Protein synthesis

b) Carbohydrate metabolism

c) Lipid synthesis and detoxification

d) Ribosome production

Answer: c) Lipid synthesis and detoxification

Question: What is the primary function of mitosis?

a) Production of gametes

b) Growth and repair of somatic cells

c) Genetic recombination

d) Reduction of chromosome number

Answer: b) Growth and repair of somatic cells

Question: Which of the following is a nitrogenous base in DNA?

a) Adenine

b) Uracil

c) Guanine

d) Thymine

Answer: a) Adenine

Question: In which phase of cellular respiration does the majority of ATP production occur?

a) Glycolysis

b) Krebs cycle

c) Electron transport chain

d) Pyruvate oxidation

Answer: c) Electron transport chain

Question: What is the main function of the stomata in plant leaves?

a) Photosynthesis

b) Gas exchange

c) Water absorption

d) Nutrient transport

Answer: b) Gas exchange

Question: Which type of reproduction involves the fusion of gametes?

a) Asexual reproduction

b) Binary fission

c) Budding

d) Sexual reproduction

Answer: d) Sexual reproduction

Question: What is the role of tRNA in protein synthesis?

a) Carries amino acids to the ribosome

b) Transcribes DNA into mRNA

c) Forms peptide bonds between amino acids

d) Provides energy for translation

Answer: a) Carries amino acids to the ribosome

Question: Which kingdom includes organisms that are multicellular, eukaryotic, and photosynthetic?

a) Animalia

b) Fungi

c) Plantae

d) Protista

Answer: c) Plantae

Question: What is the function of the nephron in the kidney?

a) Filtration of blood

b) Digestion of nutrients

c) Oxygen exchange

d) Hormone production

Answer: a) Filtration of blood

Question: Which process involves the conversion of glucose into pyruvate without the use of oxygen?

a) Aerobic respiration

b) Fermentation

c) Glycolysis

d) Krebs cycle

Answer: b) Fermentation