Thursday, 4 April 2019

Biology Important MCQs PPSC Exams Tests Preparation

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Biology MCQs PPSC Tests
Biology MCQs Preparation


Q.1: Photosystem II has molecules which absorbs maximum light of------- ?

  1. 680 nm
  2. 100 m
  3. 700 nm
  4. 670 nm

A

Q.2: NADPH2 provides-------- ?

  1. assimilatory power
  2. chemical energy
  3. energized electrons
  4. All of these

D

Q.3: Xanthophylls are --------- pigments ?

  1. Yellow
  2. Red
  3. Orange
  4. Green

A

Q.4: Final acceptor of electrons in respiratory chain is-------- ?

  1. NADH
  2. Cytochrome a3
  3. Water
  4. Oxygen

D

Q.5: Functional units of lungs are called------- ?

  1. Alveoli
  2. Air sacs
  3. Parabronchi
  4. None of these

B

Q.6: Of the following, which one is better respiratory medium------- ?

  1. Air
  2. Water
  3. Soil
  4. None of these

A

Q.7: The air spaces may comprise upto --------- of total volume of leaf surface ?

  1. 30%
  2. 20%
  3. 40%
  4. 50%

C

Q.8: Number of spiracles present in cockroach is--------- ?

  1. 15
  2. 10
  3. 20
  4. 30

C

Q.9: Which of the following animals has a respiratory system with one way flow of the air through the lungs, and the air is renewed after inspiration ?

  1. Cockroach
  2. Earthworm
  3. Aves
  4. Frogs

C

Q.10: Respiratory distress syndrome is common especially for infants with a------- ?

  1. Less than 7 month
  2. Less than 8 month
  3. Less than 9 month
  4. More than 9 month

A

Q.11: In which of the following joint muscles are arranged in the same plane as that of joint ?

  1. Between radius and ulna.
  2. Between ulna and scapula
  3. Between humerus and scapula
  4. Between femur and tibia.

D

Q.12: An increrase in plant girth due to activity of ------------- is called secondary growth ?

  1. Cork cambium
  2. Pith.
  3. Vascular cambium.
  4. Both a and c

D

Q.13: A fracture hematoma has------- ?

  1. Healing properties.
  2. Destructive properties.
  3. Neutralizing properties.
  4. Dead cells

D

Q.14: Why skeletal muscles are called striated muscles ?

  1. They appear darker than smooth muscles by naked eye.
  2. Alternating dark and light bands appear on their surface when visualized by naked eye.
  3. Alternating dark and light bands appear on their surface when visualized via a microscope.
  4. All of these

C

Q.15: Diameter of thick filament is--------- ?

  1. 7 nm.
  2. 8 nm
  3. 16nm
  4. 10-100 ?m.

C

Q.16: Which of the following statement about an arthropod exoskeleton is incorrect ?

  1. It permits gaseous exchange
  2. It contains joints, for the same purpose as present in human skeletal system
  3. It provides muscle attachment
  4. Like all the other types of exoskeleton, they lack sensation

B

Q.17: Insertion of Biceps is on------- ?

  1. Ulna
  2. Olecronon process of ulna.
  3. Radius
  4. Scapula

C

Q.18: Which of the following vertebrates have a fish-like body ?

  1. Reptiles
  2. Aves
  3. Amphibians
  4. Mammals.

C

Q.19: S-band locomotion is characteristically seen in--------- ?

  1. Cartilaginous fish.
  2. Bony fish
  3. Fish like mammals.
  4. All fishes.

A

Q.20: In plants, the neighbouring cells are connected with one another by------- ?

  1. Plasmodesmata
  2. Cell walls
  3. Vacuoles
  4. Both ‘A’ & ‘B’

D

Q.21: The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane) ?

  1. Deffusion
  2. Active transport
  3. None of these
  4. Osmosis

D

Q.22: The flow of lymph is maintained by--------- ?

  1. Movement of viscera
  2. Breathing movements
  3. Valves
  4. All of these

D

Q.23: Tricuspid valve is present------- ?

  1. Between right atrium and right ventricle
  2. Between left atrium and left ventricle
  3. At base of pulmonary artery
  4. At base of aorta

A

Q.24: 95% of the cytoplasm of red blood cells is the-------- ?

  1. Antibodies
  2. Hemoglobin
  3. Enzymes
  4. Proteins

B

Q.25: Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called----- ?

  1. Diffusion.
  2. Facilitated diffusion.
  3. Passive transport.
  4. Active transport.

B

Q.26: Addition of salts and other solutes from other cells into xylem sap, ---------- the water potential of the xylem sap ?

  1. Increases.
  2. Doesn’t effect.
  3. Maintains.
  4. Lowers.

D

Q.27: The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called------- ?

  1. Homeostasis
  2. Hemostasis
  3. Osmoregualtion
  4. Thermoregulation

C

Q.28: Which of the following statement about conifers is correct ?

  1. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
  2. Accumulate waste in leaves, which fall in autumn.
  3. Production of black wood in the center.
  4. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

D

Q.29: In plants, which of the following is a waste product produced both during photosynthesis and respiration ?

  1. H2O
  2. CO2
  3. O2
  4. Both A and B

A

Q.30: Which of the following structure in plant’s body is called excretophores ?

  1. Stem
  2. Leaves
  3. Flowers
  4. Roots

B

Q.31: Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining ?

  1. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
  2. Trimethyl alanine
  3. Ammonia
  4. Trimethylamine oxide

A

Q.32: In osmosis water molecules move from area of ------------- through semipermeable memberane ?

  1. Higher solute concentration to lower solute concentration
  2. Lower solute concentration to higher solute concentration
  3. Lower solvent concentration to higher solvent concentration
  4. All of these

B

Q.33: A stone measuring 0.4 cm, blocking the outlet of renal pelvis resulting in mild to moderate tract obstruction. Which of the following technique will be opted to remove this stone ?

  1. Kidney surgery
  2. Burring a hole and removing the stone manually (nephrolithotomy)
  3. Extracorporeal Shock wave lithotripsy
  4. None of these

C

Q.34: Which of the following openings have cilia ?

  1. Nephrostome
  2. Nephridiopore
  3. Both of these
  4. None of these

A

Q.35: It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates ?

  1. Placenta
  2. Cranianta
  3. Notochord
  4. Ligule

C

Q.36: Diatoms belong to---------- ?

  1. Chrysophyta
  2. Bacillariophyceae
  3. Xanthophyceae
  4. Both
  5. and B.

D

Q.37: Production of pyrogens is a ---------- phenomenon ?

  1. Protective
  2. Destructive
  3. Constructive
  4. Aggressive

A

Q.38: Which excretory product in produced in plants during autotrophic mode of life ?

  1. CO2
  2. H2O
  3. O2
  4. Both A and B

C

Q.39: The opening and closing of stomata is directly controlled by the--------- ?

  1. Temperature
  2. pH
  3. Light
  4. None of these

C

Q.40: Which of the following have thickest walls ?

  1. Arteries
  2. Veins
  3. Capillaries
  4. None of these

A

Q.41: The uptake of water in plants involves-------- ?

  1. Active transport
  2. Passive transport
  3. Both of these
  4. None of these

B

Q.42: How many vertebrae are present in vertebral column of man ?

  1. 33 vertebrae
  2. 33 pairs of vertebrae
  3. 25 vertebrae
  4. 31 vertebrae

A

Q.43: A smallest contractile unit of muscle contraction called sarcomere is the area between two ?

  1. H- zone
  2. M- Line
  3. Z- Line
  4. A band

C

Q.44: Which of the following cells are involved in soft callus formation ?

  1. Fibroblast and osteoblast.
  2. Osteoblast and osteoclast.
  3. Osteoclast and osteocyte
  4. Onteocyte and osteoblast

A

Q.45: Main blood vessel of arthropods usually ?

  1. Lies on dorsal side
  2. Lies on ventral side
  3. Lies on lateral side
  4. Is not present

A

Q.46: Which of the following fishes contained lungs ?

  1. Lamprey
  2. Perch
  3. Plaice
  4. Dipnoi

D

Q.47: All of the following coelenterates show alternation of generation except ?

  1. Hydra
  2. Obelia
  3. Aurelia
  4. None of these

A

Q.48: Excretory system of platyhlminthes consists of--------- ?

  1. Nephridia
  2. Flame cells
  3. Malpighian tubules
  4. Nephrons

B

Q.49: Nervous system of nematods consists of ?

  1. Ventral nerve cord
  2. Dorsal nerve cord
  3. Lateral nerve cord
  4. All of these

D

Q.50: Prechordates is another name used for------ ?

  1. Hemichordates
  2. Echinoderms
  3. Vertebrates
  4. Chordates

A