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Quiz 1
Mdcat-past-papers - IBA - Biology Quiz
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Board: IBA | Subject: Biology |
1. Overconsumption of which of the following foods increases the risk of calcium oxalate stone?
Leafy vegetables
Fruits contain Vitamin C
Fruits contain high fiber
Whole grains
2. Which product is produced by genetically modified bacteria for patients with Diabetes mellitus?
Insulin
Erythropoietin
Growth hormone
Vaccine
3. Which changes occur in the endometrium during the proliferate phase of the menstrual cycle?
It begins to shed
It regenerates and thickens
It becomes secretory
No change occurs
4. Role of mRNA in COVID-19 vaccines like Pfizer and Moderna is to:
Helps the immune system recognize the virus
Instructs cells to produce the viral spike protein
Triggers immediate antibody release from memory cells
Delivers enzymes that destroy the virus
5. Living cells of cartilage are called as:
Osteocytes
Thrombocytes
Chondrocytes
Osteoblasts
6. The regulator of muscle contraction, which is released from sarcoplasmic reticulum is:
Tropomyosin
Troponin
Calcium ions
7. Automatic and rapid actions that do not involve the conscious part of brain is:
Reflex actions
Conditioned reflexes
Taxes
Synapses
8. Crossing over involves exchange of genetic material between:
Sister chromatids of same chromosome
Non-sister chromatids of homologous chromosomes
Chromatids of non-homologous chromosomes
Sister chromatids of homologous chromosomes
9. Name the biomolecule essential for information storage and transmission within cells.
Carbohydrates
Lipids
Nucleic acids
Proteins
10. What is the chemical composition of chromosomes?
RNA and lipids
DNA and proteins
Carbohydrates and nucleic acids
Proteins and carbohydrates
11. Which of the following surrounds myofibril in skeletal muscle that stores and distributes calcium ions during muscle functioning?
Sarcodermna
Sarcoplasmic reticulum
Transverse tubules
Sarcoplasm
12. Shivering thermogenesis involves:
Voluntary muscle contraction
Involuntary muscle contraction
Dehydration
Hormone secretion
13. Guanine - cytosine pairs enhance DNA stability due to:
Larger size
Closer pairing
More hydrogen bonds
Double ring structure in both
14. Which of the following neurons conduct impulses from sensory receptors to CNS:
Sensory neurons
Motor neurons
Efferent neurons
Interneurons
15. Why Lamarek is being remembered till today?
Due to his rejected but appealing theory of heredity
Due to his universally acceptable theory of evolution
Due to his accepted theory of heredity
Due to his theory of evolution by natural selection
16. Which of the following is NOT related to DNA?
Adenine
Thymine
Uracil
Guanine
17. If a male with hemophilia marries a non-carrier female, what is the likelihood of their sons inheriting the condition?
50%
100%
0%
25%
18. Which of the following is a characteristic of a non-competitive enzyme inhibitor?
Binds to the enzyme active site
Can be overcome by increasing substrate concentration
Increases the speed of the reaction
Point of action is allosteric site
19. Which of the following event prevent backflow of blood from ventricles to atria during ventricular systole?
Contraction of the atrial wall muscles
Closure of tricuspid and bicuspid valves
Opening of semilunar valve
Opening of tricuspid and bicuspid valves
20. In the following process the cells release energy from oxidation of food molecules?
Cellular respiration
Photosynthesis
DNA replication
Protein synthesis
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