Medical Entrance
Q. What is the unit of pressure in SI? (2023)
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A.
Pascal
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B.
Bar
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C.
Atmosphere
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D.
Torr
Solution
The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer: A — Pascal
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Q. What is the van 't Hoff factor (i) for a non-electrolyte solute? (2023)
Solution
The van 't Hoff factor (i) for a non-electrolyte solute is 1, as it does not dissociate into ions.
Correct Answer: A — 1
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Q. What is the van 't Hoff factor (i) for a strong electrolyte like Na2SO4 in solution? (2023)
Solution
Na2SO4 dissociates into 3 ions (2 Na⁺ and 1 SO4²⁻), so i = 3.
Correct Answer: C — 3
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Q. What is the vapor pressure of a solution containing 1 mole of solute in 9 moles of solvent, assuming ideal behavior? (2019)
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A.
0.1 P0
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B.
0.9 P0
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C.
0.5 P0
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D.
0.2 P0
Solution
Using Raoult's law, the vapor pressure of the solution = (moles of solvent / total moles) * P0 = (9 / 10) * P0 = 0.9 P0.
Correct Answer: B — 0.9 P0
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Q. What is the vapor pressure of a solution containing 2 moles of solute and 4 moles of solvent, assuming ideal behavior? (2022)
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A.
0.33 P0
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B.
0.50 P0
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C.
0.67 P0
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D.
0.75 P0
Solution
Vapor pressure = (moles of solvent / total moles) * P0 = (4 / (2 + 4)) * P0 = (4/6) * P0 = 0.67 P0.
Correct Answer: C — 0.67 P0
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Q. What is the voltage across a 10Ω resistor carrying a current of 2A? (2022)
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A.
5V
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B.
10V
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C.
15V
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D.
20V
Solution
Using Ohm's law, V = I * R = 2A * 10Ω = 20V.
Correct Answer: B — 10V
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Q. What is the Young's modulus of a material if a stress of 200 MPa produces a strain of 0.01? (2021)
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A.
2000 MPa
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B.
20 MPa
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C.
200 MPa
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D.
2 MPa
Solution
Young's modulus (E) = Stress / Strain = 200 MPa / 0.01 = 20000 MPa = 2000 MPa.
Correct Answer: A — 2000 MPa
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Q. What role does phosphorus play in plants? (2021)
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A.
Energy transfer
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B.
Water absorption
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C.
Cell wall formation
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D.
Photosynthesis
Solution
Phosphorus is vital for energy transfer through ATP and is also important for nucleic acid synthesis.
Correct Answer: A — Energy transfer
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Q. What structure forms during prophase to help separate chromosomes? (2022)
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A.
Centromere
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B.
Spindle fibers
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C.
Chromatin
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D.
Nuclear envelope
Solution
Spindle fibers form during prophase to help separate the chromosomes during mitosis.
Correct Answer: B — Spindle fibers
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Q. What structure regulates the entry and exit of substances in a cell? (2021)
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A.
Cell Wall
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B.
Nucleus
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C.
Plasma Membrane
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D.
Cytoplasm
Solution
The plasma membrane regulates the entry and exit of substances in and out of the cell, maintaining homeostasis.
Correct Answer: C — Plasma Membrane
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Q. What term describes the process by which unrelated organisms evolve similar traits? (1970)
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A.
Convergent Evolution
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B.
Divergent Evolution
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C.
Adaptive Radiation
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D.
Co-evolution
Solution
Convergent evolution occurs when unrelated organisms evolve similar traits due to similar environmental pressures.
Correct Answer: A — Convergent Evolution
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Q. What term describes the role and position a species has in its environment? (2020)
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A.
Habitat
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B.
Niche
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C.
Biome
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D.
Ecosystem
Solution
The niche of a species is its role and position in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the role of an organism in its ecosystem? (2022)
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A.
Habitat
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B.
Niche
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C.
Biome
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D.
Community
Solution
Niche refers to the role and position a species has in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the role of an organism in its environment? (2019)
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A.
Habitat
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B.
Niche
-
C.
Biome
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D.
Community
Solution
The niche of an organism refers to its role and position in its environment, including all interactions with biotic and abiotic factors.
Correct Answer: B — Niche
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Q. What term describes the variety of life in a particular habitat or ecosystem? (2022)
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A.
Genetic diversity
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B.
Species diversity
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C.
Ecosystem diversity
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D.
Biodiversity
Solution
Species diversity refers to the variety of life in a particular habitat or ecosystem.
Correct Answer: B — Species diversity
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Q. What term describes the variety of life in the world or in a particular habitat? (2021)
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A.
Ecosystem
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B.
Biodiversity
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C.
Population
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D.
Community
Solution
Biodiversity refers to the variety of life in the world or in a particular habitat.
Correct Answer: B — Biodiversity
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Q. What term is used to describe the scientific study of living organisms? (2022)
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A.
Biology
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B.
Zoology
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C.
Botany
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D.
Ecology
Solution
Biology is the scientific study of living organisms, encompassing various sub-disciplines such as zoology and botany.
Correct Answer: A — Biology
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Q. What term is used to describe the variety of life in the world or in a particular habitat or ecosystem? (2022)
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A.
Biodiversity
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B.
Ecology
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C.
Biology
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D.
Genetics
Solution
Biodiversity refers to the variety of life in the world or in a particular habitat or ecosystem.
Correct Answer: A — Biodiversity
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Q. What type of adsorption is characterized by a low heat of adsorption, typically less than 40 kJ/mol? (2023)
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A.
Physisorption
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B.
Chemisorption
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C.
Multilayer adsorption
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D.
Surface reaction
Solution
Physisorption is characterized by a low heat of adsorption, typically less than 40 kJ/mol, due to weak van der Waals forces.
Correct Answer: A — Physisorption
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Q. What type of amine is formed when ammonia reacts with an alkyl halide? (2022)
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A.
Primary amine
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B.
Secondary amine
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C.
Tertiary amine
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D.
Quaternary ammonium salt
Solution
The reaction of ammonia with an alkyl halide initially forms a primary amine.
Correct Answer: A — Primary amine
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Q. What type of biomolecule are enzymes? (2019)
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A.
Carbohydrates
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B.
Proteins
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C.
Lipids
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D.
Nucleic acids
Solution
Enzymes are primarily proteins that catalyze biochemical reactions.
Correct Answer: B — Proteins
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Q. What type of bond is formed between two atoms that share electrons? (2022)
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A.
Ionic bond
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B.
Covalent bond
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C.
Metallic bond
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D.
Hydrogen bond
Solution
A covalent bond is formed when two atoms share electrons.
Correct Answer: B — Covalent bond
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Q. What type of bond is present in alkynes? (2022)
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A.
Single bond
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B.
Double bond
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C.
Triple bond
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D.
Quadruple bond
Solution
Alkynes contain at least one triple bond between carbon atoms.
Correct Answer: C — Triple bond
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Q. What type of bond is primarily found in organic compounds? (2023)
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Metallic bonds
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D.
Hydrogen bonds
Solution
Organic compounds primarily consist of covalent bonds formed between carbon and other atoms.
Correct Answer: B — Covalent bonds
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Q. What type of bond links amino acids together? (2023)
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A.
Ionic bond
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B.
Hydrogen bond
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C.
Peptide bond
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D.
Disulfide bond
Solution
A peptide bond links amino acids in proteins.
Correct Answer: C — Peptide bond
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Q. What type of charge carriers are present in n-type semiconductors? (2019)
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A.
Holes
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B.
Electrons
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C.
Protons
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D.
Neutrons
Solution
In n-type semiconductors, the majority charge carriers are electrons.
Correct Answer: B — Electrons
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Q. What type of connective tissue connects muscles to bones? (2021)
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A.
Tendons
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B.
Ligaments
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C.
Cartilage
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D.
Adipose tissue
Solution
Tendons are connective tissues that connect muscles to bones, allowing for movement.
Correct Answer: A — Tendons
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Q. What type of connective tissue stores fat in the body? (2021)
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A.
Adipose tissue
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B.
Cartilage
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C.
Bone
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D.
Blood
Solution
Adipose tissue is a type of connective tissue that stores fat and provides insulation and cushioning.
Correct Answer: A — Adipose tissue
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Q. What type of crystal system does a diamond belong to? (2023)
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A.
Cubic
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B.
Tetragonal
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C.
Hexagonal
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D.
Orthorhombic
Solution
Diamond crystallizes in a cubic crystal system, specifically in a face-centered cubic lattice.
Correct Answer: A — Cubic
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Q. What type of decay involves the conversion of a proton into a neutron? (2019)
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A.
Alpha decay
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B.
Beta plus decay
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C.
Beta minus decay
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D.
Gamma decay
Solution
Beta plus decay involves the conversion of a proton into a neutron, emitting a positron.
Correct Answer: B — Beta plus decay
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