Saturday, 30 March 2019

Important Biology MCQs With Answers For Exams Preparation With Quiz Test

All of the PPSC CSS NTS OTS FPSC MCATand many others exams jobs tests Biology subject is most important. In MCAT Test Preparations these Multiple Choice Questions are important. You can easily prepared here solved MCQs with Answers of Biology Complete MCQs Notes of all punjab, sindh, Balochistan, KPK and others tests.




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Biology MCQs Quiz Tests With Answers List

Question 1: The structure of an enzyme is altered by---------- ?
  1. Irreversible inhibitor
  2. Reversible inhibitor
  3. Competitive inhibitor
  4. Non-competitive inhibitor
A
Question 2: Strengthening material of prokaryotic cell wall is--------- ?
  1. Cellulose
  2. Chitin
  3. Inorganic salts silica waxes and ligin
  4. Peptidoglycan or Murein.
D
Question 3: Which of the following impart a red colour to Rose petals ?
  1. Chloroplast
  2. Chlorophyll
  3. Chromoplast
  4. Leucoplast
C
Question 4: Which chemical component has the greatest contribution in the total mammalian cell weight--------- ?
  1. Proteins
  2. Carbohydrate
  3. Lipids
  4. Water
D
Question 5: Which of the following substance is most favorable to form structural component of biological membranes--------- ?
  1. Hydrophilic Carbohydrates
  2. Hydrophobic fats.
  3. Both a and b
  4. None of these
D
Question 6: Variety among amino acids is produced due to----------- ?
  1. NH2 group
  2. COOH group
  3. R group
  4. All of these
C
Question 7: Which of the following carbohydrate can not be hydrolysed-------------- ?
  1. Monosaccharide
  2. Oligosaccharide
  3. Polysaccharide
  4. None of these
A
Question 8: Which one gives blue colour with iodine-------------- ?
  1. Starch
  2. Glycogen
  3. Cellulose
  4. Polysaccharide
A
Question 9: -------- is example of pure form of cellulose ?
  1. Silk
  2. Wool
  3. Cotton
  4. Paper
C
Question 10: Which of the following statement is incorrect5 for fats containing unsaturated fatty acid---------- ?
  1. They contain double bond
  2. They are usually solid at room temperature
  3. They are lighter than water
  4. Their specific gravity is less than 1
B
Question 11: Proteins are polymers of---------- ?
  1. Fatty acids
  2. Isoprenoid units
  3. Amino acids
  4. Nucleotides
C
Question 12: A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called--------- ?
  1. Phosphodiester linkage
  2. Glycosidic bond
  3. Peptide bond
  4. Hydrogen bond
C
Question 13: Protein coasts of viruses are synthesized in----------- ?
  1. Lytic cycle
  2. Lysogenic cycle
  3. Both a & b
  4. All of these
A
Question 14: Which of the following occurs in anaerobic respiration but not in aerobic respiration ?
  1. Release of CO2
  2. Reduction of NAD
  3. Formation of ATP
  4. Production of ethanol from acetaldehyde
D
Question 15: How many carbon atoms are required to form a furan ring (ribofuranose)---------- ?
  1. 3
  2. 4
  3. 5
  4. 2
B
Question 16: The basic structural unit of a chromosome is---------- ?
  1. The centromere
  2. Nuceleosome
  3. Telomere
  4. Histone
B
Question 17: Carbon commonly combines with---------- ?
  1. H
  2. N & O
  3. P & S
  4. All of these
D
Question 18: The red green color blindness is sex linked recessive condition in man. A father with normal vision and a color blind mother world expect to produce ?
  1. Color blind sons and daughter with normal vision
  2. Sons with normal vision and color blind daughters
  3. Color blind sons colour blind daughters and daughters with normal vision
  4. Sons with normal vision colour blind daughter and daughters with normal vision
A
Question 19: The one which can break open a plasmid ring is--------- ?
  1. Ligase enzyme
  2. Primase enzyme
  3. Restriction endonuclease
  4. ATP-ase enzyme
A
Question 20: Which of the following organisms have Chitin as a major structural component of their cell wall------------- ?
  1. Prokaryotae
  2. Protoctista
  3. Plantae
  4. Fungi
D
Question 21: Vaccine Was discovered by--------- ?
  1. Louis Pasteur
  2. Edward Jennar
  3. Ivanowski
  4. Stanely
B
Question 22: Complex symptoms like severe pneumonia vascular tumor sudden weight loss swollen lymph nodes and immune deficiency are features of ?
  1. Polio
  2. Hepatitis
  3. AIDS
  4. HIV
C
Question 23: Malaria is associated with-------- ?
  1. Culex Mosquito
  2. Culiesta Mosquito
  3. Anopheles Mosquito
  4. Culex & Anopheles Mosquito
C
Question 24: About ---------- of the body weight of a mammal is water ?
  1. 60%
  2. 65%
  3. 70%
  4. 75%
C
Question 25: Which one of them is a micro-molecule ?
  1. Polysaccharide
  2. Protein
  3. Hemoglobin
  4. ATP
D
Question 26: Which of the following pathogen type cause disease that can be treated with antibiotics ?
  1. bacteria
  2. fungi
  3. virus
  4. none of these
A
Question 27: Proteins are made from amino acids by the process of ----------- ?
  1. Hydrolysis
  2. Pinocytosis
  3. Dehydration synthesis
  4. Active transport
C
Question 28: Breeders have developed new and better varieties of food items by using which technique ?
  1. Pasteurization
  2. Hydroponic culture technique
  3. Genetic engineering
  4. Biological control techniques
C
Question 29: What is the mode of transmission of Hepatitis virus ?
  1. Aerosol
  2. Parentral (via blood)
  3. Skin penetration
  4. Unknown
B
Question 30: Pigment present in red algae is---------- ?
  1. fucoxanthin
  2. phycocyanin
  3. phycoerythrin
  4. bilirubin
C
Question 31: The mechanism for ATP synthesis is--------- ?
  1. Chemosynthesis
  2. Photosynthesis
  3. Phosphorylation
  4. Chemiosmosis
D
Question 32: The arrangement of -------- speaks of the division of labour within cell ?
  1. Molecule
  2. Subatomic particles
  3. Atoms
  4. Organelles
D
Question 33: Study of insects is called------- ?
  1. Immunology
  2. Parasitology
  3. Entomology
  4. Paleontology
C
Question 34: Who is Called the Father of Demography ?
  1. ALAN Turing
  2. John Dalton
  3. Charles Babbage
  4. IBN KHALDUN
D
Question 35: Exact replica of chromosome refers to --------- ?
  1. Chromatid
  2. Centromere
  3. Kinetochore
  4. Arms
A
Question 36: Ribosomes and DNA are also present in-------- ?
  1. mitochondria
  2. golgi complex
  3. endoplasmic reticulum
  4. lysosomes
D
Question 37: On average there are ------- or more thylakoid per granum ?
  1. 60
  2. 50
  3. 40
  4. 70
B
Question 38: Which character differentiates living things from non-living organisms--------- ?
  1. They live in the same ecosystem.
  2. They are acted upon by the same environment
  3. They are highly organized and complex made of one or more cells and contain genetic material
  4. Both a and b
C
Question 39: In animals coordination is achieved by means of-------- ?
  1. Respiratory system
  2. Nervous system
  3. Endocrine system
  4. Both b and c
D
Question 40: Unbroken series of organisms arranged from ancestor to descendant sequence is---------- ?
  1. Biodiversity
  2. Phyletic lineage
  3. Connecting link
  4. Evolutionary line
B
Question 41: Breakdown of large molecules into smaller ones utilizing water molecules is----- ?
  1. Hydration
  2. Hydrolysis
  3. Dehydration synthesis
  4. Electrolysis
B
Question 42: Destruction of all life forms is called---------- ?
  1. Sterilization
  2. Disinfection
  3. Antisepsis
  4. Preservation
A
Question 43: If bile pigments are prevented from leaving digestive tract, then they cause---------- ?
  1. Hepatitis
  2. Jaundice
  3. Gall stones
  4. Blockage
B
Question 44: Salivary glands present in front of ear are--------- ?
  1. Sublingual
  2. Submaxillary
  3. Submandibular
  4. Parotid
D
Question 45: Gaseous exchange in birds occurs at level of------------ ?
  1. Alveoli
  2. Air sacs
  3. Bronchi
  4. Parabronchi
D
Question 46: According to cohesion-tension theory, tension is created by------------ ?
  1. Hydrogen bonding
  2. Transpiration
  3. Adhesion
  4. Root prerssure
B
Question 47: Who first observed and thus hypothesized that new cells are formed from previously existing living cell ?
  1. Theodor Schwann and Schleiden
  2. Rudolph Virchows
  3. Louis Pasteur
  4. Both b and c
B
Question 48: Annual rainfall in grassland is about----------- ?
  1. More than 2500 mm
  2. 750-1500 mm
  3. 250-750 mm
  4. Less than 250 mm
C
Question 49: Which of the following hormone is polypeptide in nature------- ?
  1. Insulin
  2. Thyroxine
  3. ADH
  4. Cortisone
C
Question 50: The stent energy in the form of ADP is regenerated by mitochondria into------- ?
  1. AMP
  2. ADP
  3. ATP
  4. All of these
C