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Biology
A. Glucose
B. Amino acid
C. Starch
D. Fatty acid
Answer: Starch is a polysaccharide made of many glucose units and serves as energy storage in plants.
Biology
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin K
Answer: Vitamin K is necessary for the synthesis of clotting factors in the liver.
Biology
A. Meiosis
B. Mitosis
C. Binary fission
D. Cytokinesis
Answer: Mitosis produces two genetically identical daughter cells from a single parent cell.
Biology
A. Lysosome
B. Ribosome
C. Peroxisome
D. Vacuole
Answer: Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.
Biology
A. Glucagon
B. Insulin
C. Adrenaline
D. Thyroxine
Answer: Insulin promotes the uptake and storage of glucose, thereby lowering blood sugar levels.
Biology
A. Phenotype
B. Genotype
C. Allele
D. Locus
Answer: Genotype refers to the complete set of genes an organism carries.
Biology
A. Cytosine
B. Guanine
C. Thymine
D. Uracil
Answer: In DNA, Adenine always pairs with Thymine through two hydrogen bonds.
Biology
A. Monohybrid cross
B. Dihybrid cross
C. Test cross
D. Back cross
Answer: A test cross involves crossing an individual with dominant phenotype but unknown genotype with a homozygous recessive individual.
Biology
A. Atom
B. Cell
C. Tissue
D. Organ
Answer: The cell is the basic structural and functional unit of all living organisms.
Biology
A. A
B. B
C. AB
D. O
Answer: Blood group O has no A or B antigens, making it safe to transfuse to any blood group.
Biology
A. Ribosome
B. Golgi apparatus
C. Mitochondria
D. Endoplasmic reticulum
Answer: Mitochondria generate most of the cell\'s supply of ATP through oxidative phosphorylation.
Biology
A. Mitochondria
B. Ribosome
C. Cell wall
D. Cell membrane
Answer: Plant cells have a rigid cell wall made of cellulose that provides structural support.
Biology
A. G1 phase
B. S phase
C. G2 phase
D. M phase
Answer: During the S (synthesis) phase, DNA is replicated so each daughter cell receives a complete copy.
Biology
A. Thyroid
B. Pancreas
C. Liver
D. Salivary gland
Answer: The liver performs over 500 functions including bile production, detoxification, and metabolism.
Biology
A. DNA polymerase
B. Helicase
C. Ligase
D. Primase
Answer: Helicase breaks the hydrogen bonds between base pairs, unwinding the DNA double helix.
Biology
A. Plant cell
B. Animal cell
C. Prokaryotic cell
D. Eukaryotic cell
Answer: Prokaryotic cells lack a membrane-bound nucleus; their genetic material floats freely in the cytoplasm.
Biology
A. Bronchus
B. Trachea
C. Alveolus
D. Larynx
Answer: Alveoli are tiny air sacs with thin walls where oxygen and carbon dioxide are exchanged.
Biology
A. Nephron
B. Neuron
C. Alveolus
D. Villus
Answer: Each nephron filters blood and forms urine through filtration, reabsorption, and secretion.
Biology
A. Mitosis
B. Fertilization
C. Gamete formation
D. Growth
Answer: Alleles for each trait separate so that each gamete carries only one allele for each gene.
Biology
A. DNA -> Protein -> RNA
B. RNA -> DNA -> Protein
C. DNA -> RNA -> Protein
D. Protein -> RNA -> DNA
Answer: The central dogma states that DNA is transcribed to RNA, which is then translated to protein.
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