Monday, 8 April 2019

Important Biology MCQs PPSC Exams

Most of the PPSC Exams are included biology mcqs in english. Here i am sharing Past Years important repeated MCQs of biology mcqs with explanations with Answers. You can easily get better marks by preparing these important MCQs list solving here. By these biology mcqs for competitive exams you can learn one by one question here.

Biology MCAT Tests Exams Preparations MCQs Tests
Biology Repeated MCQs PPSC
Online MCQs of Medical Jobs tests, Medical Interviews for MBBS and Nursing jobs tests. PPSC online Past Papers of Medical exams tests preparations with solved MCQs quiz tests.


Biology Online Biology Medical Test MCQs Quiz Preparations




Test 1 || Test 2 || Test 3 || Test 4 || Test 5 || Test 6 || Test 7 || Test 8 || Test 9 || Test 10 || Test 11 || Test 12 || Test 13 || Test 14 || Test 15 || Test 16 || Test 17 || Test 18 || Test 19 || Test 20 || Test 21 || Test 22 || Test 23 || Test 24 || Test 25


Biology Medical Exams Preparations Online Quiz Test


Q.1: Net yield of H2O in Photosynthesis is------- ?
  1. 1 molecule
  2. 6 molecules
  3. 3 molecules
  4. 0 molecule
D
Q.2: Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on-------- ?
  1. Bacteria
  2. Algae
  3. Protenema
  4. Cyanobacteria
A
Q.3: PS I has chlorophyll a molecule which absorbs maximum light of --------- nm ?
  1. 600
  2. 650
  3. 680
  4. 700
D
Q.4: The first action spectrum was obtained by-------- ?
  1. T.W.Englemam
  2. Malleus
  3. T.W.Inws
  4. W.Stapes
A
Q.5: Of the following, which one causes higher production of food in green plants ?
  1. Blue
  2. Orange
  3. Red
  4. Violet
C
Q.6: Which of the following statement about the head of a chlorophyll molecule is incorrect ?
  1. It is a porphyrin ring or tetrapyrrole ring structure
  2. It is flat, square and light absorbing
  3. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.
  4. It is hydrophobic
D
Q.7: Photosynthesis carried out by terrestrial plants is --------- of total photosynthesis ?
  1. 1-2%
  2. 5%
  3. 10%
  4. 20%
C
Q.8: Molecular formula of chlorophyll ‘a’ molecule is-------- ?
  1. C55H72O5N4Mg
  2. C55H70O6N4Mg
  3. C50H72O6N4Mg
  4. C55H70O5N4Mg
A
Q.9: Stomata cover only -------------- of leaf surface ?
  1. 0.03 – 0.04%
  2. 10%
  3. 1-2 %
  4. 50%
C
Q.10: In all plants the major sites of phosynthesis are------- ?
  1. Leaves respire and utilize O2 and release CO2.
  2. Stems
  3. Roots
  4. Branches
A
Q.11: Glycolysis takes place in---------- ?
  1. Nucleus
  2. Cytosol
  3. Mitochondria.
  4. Ribosomes
D
Q.12: Complete breakdown of glucose molecule takes place in which of the following ?
  1. Alcoholic fermentation
  2. Lactic acid fermentation
  3. Aerobic respiration
  4. All of these
C
Q.13: The most important photosynthetic pigment is ---------- ?
  1. Chlorophyll a
  2. Chlorophyll b
  3. Xanthophyll
  4. Carotenes
A
Q.14: In which of the following component of the body, lactic acid fermentation takes place ?
  1. Brain
  2. Heart
  3. Liver
  4. Muscles
D
Q.15: In Anaerobic respiration only ---------- % of the energy present within the chemical bond of glucose is converted into ATP ?
  1. 1%
  2. 2%
  3. 3%
  4. 4%
B
Q.16: From one pyruvate passing through Kreb’s cycle, how many NADH are formed ?
  1. 1
  2. 2
  3. 3
  4. 4
C
Q.17: ATP are consumed during------ ?
  1. Glycolysis
  2. Kreb’s cycle
  3. Light dependent phase
  4. none of these
A
Q.18: Lungs are spongy due to the presence of million of--------- ?
  1. Air sacs
  2. Alveoli
  3. Bronchioles
  4. Parabronchi
B
Q.19: Lungs are covered with double layered thin membranous sac called--------- ?
  1. Disphragm
  2. Pericardium
  3. Pleura
  4. Rib cage
C
Q.20: During rest the breathing occurs rhythmically at the frequency of --------- times per minute in human ?
  1. 16-30
  2. 15-20
  3. 5?10
  4. 6?12
B
Q.21: Haemoglobin can be almost completely oxygenated by an oxygen pressure of ---------- of mercury ?
  1. 10 mm
  2. 60 mm
  3. 10 cm
  4. 100 mm
D
Q.22: Important factors which affect the capacity of haemoglobin to combine with oxygen is ?
  1. Temperature
  2. Carbon dioxide
  3. pH
  4. All of these
D
Q.23: The glycolate produced diffuses into the membrane bounded organelles called--------- ?
  1. Glyoxisomes
  2. Peroxisomes
  3. Lysosomes
  4. Mitochondria
B
Q.24: Percentage of CO2 carried as carboxyhaemoglobin is------- ?
  1. 5%
  2. 70%
  3. 20%
  4. 10%
C
Q.25: Chlorophylls mainly absorb --------- wavelengths ?
  1. Orange – blue
  2. Violet – red
  3. Yellow – orange
  4. Orange – red.
D
Q.26: Chlorophylls are found embedded in the ---------- membranes ?
  1. Stroma
  2. Grana
  3. Thylakoid
  4. Intergrana
C
Q.27: Deficiency of ----------- causes yellowing in plants ?
  1. Magnesium
  2. Iron
  3. Chlorine
  4. Oxygen
A
Q.28: Arterial blood contains --------- of CO2 per 100 ml of blood ?
  1. 54 ml
  2. 60 ml
  3. 64 ml
  4. 50 ml
D
Q.29: A disease of longs in which inside of the lungs is damaged resulting in cough and fever ?
  1. Lung cancer
  2. Asthma
  3. Emphysema
  4. Pulmonary tuberculosis
C
Q.30: Of the following, which one is a contagious disease ?
  1. Tuberculosis
  2. Lungs cancer
  3. Asthma
  4. Emphysema
A
Q.31: Which of the following promotes growth in plants ?
  1. Photorespiration
  2. Calvin cycle
  3. Both of these
  4. None of these
B
Q.32: The blood enters the ---------------- side of heart ?
  1. Posterior
  2. Anterior
  3. Lateral
  4. All possible
A
Q.33: Parabronchi are open at -------------- end/s ?
  1. Single
  2. Both
  3. Do not have opening
  4. None of these
B
Q.34: Gaseous exchange through the skin is known as -------------- respiration ?
  1. Cuticular
  2. Cutaneous
  3. Skin
  4. Pulmonary
B
Q.35: Voice box is another name used for-------- ?
  1. Buccal cavity
  2. Pharynx
  3. Larynx
  4. Chest Cavity
C
Q.36: A joint formed between humerus, radius and ulna is an example of------- ?
  1. Immovable joint.
  2. Slightly movable joint.
  3. Freely movable joint.
  4. Fibrous joint
C
Q.37: Fibrous capsule surrounding synovial joints may be thickened at some places to form ?
  1. Synovial membrane.
  2. Ligaments.
  3. Muscles.
  4. Tendon
B
Q.38: Which of the following plays the major role in providing support to young herbaceous parts of the plant ?
  1. Living cells of epidermis with higher turgor pressure.
  2. Living cells of cortex and pith with higher turgor pressure.
  3. Collenchyma cells
  4. All of these
D
Q.39: Which of the following hormone is predominantly responsible for bone weakening in older women ?
  1. Progesterone.
  2. Oestrogen.
  3. Parathyroid hormone.
  4. Calcitonin.
B
Q.40: Secondary cell wall of sclerenchyma cells is impregnated with------------ ?
  1. Cellulose.
  2. Peptidoglycan and murein.
  3. Lignin.
  4. Pectin.
C
Q.41: Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency ?
  1. Hypocalcaemia Tatanic spasms.
  2. Osteomalacis.
  3. Rickets.
  4. Tetany
C
Q.42: Which of the following statements about fractures in old age is incorrect ?
  1. They are more common than in adult age.
  2. Occur as a result of bone being thin and weak.
  3. Due to good blood supply it results in quick healing.
  4. It involves osteoblasts and osteocytes.
C
Q.43: If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called------- ?
  1. Open reduction.
  2. Closed Fixation.
  3. Open fixation.
  4. Immobilization
A
Q.44: The place of attachment of leaf with the shoot is called----- ?
  1. Pith.
  2. Pit.
  3. Pulvinus
  4. Ecdysone
C
Q.45: Which of the following is a uni-nucleated cell ?
  1. A smooth muscle cell.
  2. A cardiac muscle cell.
  3. A skeletal muscle cell.
  4. All of these
A
Q.46: Rapid movement of leaves of mimosa on touching is an example of ------- ?
  1. Turgor movement
  2. Nastic movement
  3. Tropic movements.
  4. Growth movement
A
Q.47: Roots of a plant show---------- ?
  1. Positive phototropism and negative geotropism
  2. Negative phototropism and positive geotropism
  3. Negative tactic movement and positive tropic movement
  4. Positive geotropism of stem and roots
B
Q.48: Which of the following animal has a hydrostatic skeleton ?
  1. Earthworm
  2. Round worm
  3. Tape worm
  4. Pin worm
A
Q.49: The most important function of troponin is-------- ?
  1. To bind with actin
  2. To bind with tropomyosin.
  3. To bind with Ca2+ ions.
  4. All of these
D
Q.50: -------- potential is the measure of the change in water potential of a system due to the presence of solute molecules ?
  1. Osmotic
  2. Pressure
  3. Both of these
  4. None of these
A