Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Molecular formula of chlorophyll b is_____________? 

a. C55 H10 O4 N6 Mg  

b. C55 H70 O6 N5 Mg  

c. C55 H71 O6 N4 Mg  

d. C55 H70 O6 N4 Mg 

Answer- C55 H70 O6 N5 Mg

Que- Which of the following is a compensation point: 

a. Leaves respire and utilize O2 and release CO2.  

b. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.  

c. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.  

d. Rate of respiration becomes more than rate of photosynthesis. 

Answer- Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

Que- Quantitative study of energy relationships in biological systems obeys. 

a. Bioenergetics  

b. Laws of thermodynamics  

c. Laws of thermo chemistry  

d. Laws of chemical energetic 

Answer- Laws of thermodynamics

Que- The organisms able to use sunlight directly as a source of energy are_____________? 

a. Plants  

b. Animals  

c. Omnivores  

d. Fungi 

Answer- Plants

Que- Carotenoids perform protective function in_____________? 

a. Animals  

b. Plants  

c. Both of these  

d. None of these 

Answer- Both of these

Que- Of the following which one is not an energy releasing process? 

a. Glycolysis  

b. Respiration  

c. Photosynthesis  

d. Kreb's cycle 

Answer- Photosynthesis

Que- About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds? 

a. 0.1 

b. 0.2 

c. 0.3 

d. 0.4 

Answer- 0.1

Que- Net yield of H2O in Photosynthesis is__________? 

a. 1 molecule  

b. 6 molecules  

c. 3 molecules  

d. 0 molecule 

Answer- 0 molecule

Que- The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________? 

a. Neutral point  

b. Compensation point  

c. Parallel point  

d. Competitive point 

Answer- Compensation point

Que- Air contains __________ % of CO2 ? 

a. 0.02-0.03  

b. 0.03-0.04  

c. 0.04-0.05  

d. 0.05-0.06 

Answer- 0.03-0.04

Que- Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on___________? 

a. Bacteria  

b. Algae  

c. Protenema  

d. Cyanobacteria 

Answer- Bacteria

Que- PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ? 

a. 600.0 

b. 650.0 

c. 680.0 

d. 700.0 

Answer- 700.0

Que- Visible light used in photosynthesis ranges from:__________? 

a. 300 – 700 nm in wavelength  

b. 350 – 750 nm in wavelength  

c. 380 – 750 nm in wavelength  

d. 390 – 790 nm in wavelength. 

Answer- 380 – 750 nm in wavelength

Que- The percentage of light absorbed by the leaf is ___________? 

a. 0.2 

b. 0.15 

c. 0.1 

d. 0.01 

Answer- 0.01

Que- Which of the following light is least absorbed by the plants? 

a. Orange  

b. Red  

c. Blue  

d. Green 

Answer- Green

Que- The first action spectrum was obtained by___________? 

a. T.W.Englemam  

b. Malleus  

c. T.W.Inws  

d. W.Stapes 

Answer- T.W.Englemam

Que- Which of the light is mainly absorbed by the plants? 

a. Orange  

b. Red  

c. Green  

d. Both A and B 

Answer- Both A and B

Que- First Actions spectrum was obtained by using__________? 

a. Algae  

b. Fungi  

c. Bacteria  

d. Spirogyra 

Answer- Spirogyra

Que- Chlorophyll is insoluble in_____________? 

a. Carbon tetrachloride  

b. Alcohol  

c. Organic solvents  

d. Water 

Answer- Water

Que- Of the following, which one causes higher production of food in green plants? 

a. Blue  

b. Orange  

c. Red  

d. Violet 

Answer- Red

Que- Which of the following statement about the head of a chlorophyll molecule is incorrect? 

a. It is a porphyrin ring or tetrapyrrole ring structure  

b. It is flat, square and light absorbing  

c. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.  

d. It is hydrophobic 

Answer- It is hydrophobic

Que- Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis? 

a. 1-2%  

b. 0.05 

c. 0.1 

d. 0.2 

Answer- 0.1

Que- Molecular formula of chlorophyll 'a' molecule is___________? 

a. C55H72O5N4Mg  

b. C55H70O6N4Mg  

c. C50H72O6N4Mg  

d. C55H70O5N4Mg 

Answer- C55H72O5N4Mg

Que- Stomata cover only ______________ of leaf surface? 

a. 0.03 – 0.04%  

b. 0.1 

c. 1-2 %  

d. 0.5 

Answer- 1-2 %

Que- Which of the following pigment is Blue- green in colour? 

a. Chlorophyll a  

b. Chlorophyll b.  

c. Chlorophyll c  

d. Chlorophyll d. 

Answer- Chlorophyll a

Que- Reduction in photosynthesis is of____________? 

a. O2  

b. CO2  

c. H2O  

d. light energy 

Answer- CO2

Que- Complete breakdown of glucose molecule takes place in which of the following? 

a. Alcoholic fermentation  

b. Lactic acid fermentation  

c. Aerobic respiration  

d. All of these 

Answer- Aerobic respiration

Que- Chlorophylls mainly absorb _________ wavelengths? 

a. Orange – blue  

b. Violet – red  

c. Yellow – orange  

d. Orange – red. 

Answer- Orange – red.

Que- Deficiency of ___________ causes yellowing in plants? 

a. Magnesium  

b. Iron  

c. Chlorine  

d. Oxygen 

Answer- Magnesium

Que- In alcoholic fermentation Pyruvic acid is broken down into? 

a. Acetaldehyde  

b. Methyl alcohol  

c. Ethyl alcohol  

d. Lactic acid 

Answer- Ethyl alcohol

Que- The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as___________? 

a. Hydrophilic  

b. Hydrophobic  

c. Both of these  

d. None of these 

Answer- Hydrophobic

Que- The most important photosynthetic pigment is ___________? 

a. Chlorophyll a  

b. Chlorophyll b  

c. Xanthophyll  

d. Carotenes 

Answer- Chlorophyll a

Que- In which of the following component of the body, lactic acid fermentation takes place? 

a. Brain  

b. Heart  

c. Liver  

d. Muscles 

Answer- Muscles

Que- Final acceptor of electrons in respiratory chain is____________? 

a. NADH  

b. Cytochrome a3  

c. Water  

d. Oxygen 

Answer- Oxygen

Que- In Anaerobic respiration only __________ % of the energy present within the chemical bond of glucose is converted into ATP? 

a. 0.01 

b. 0.02 

c. 0.03 

d. 0.04 

Answer- 0.02

Que- From one pyruvate passing through Kreb's cycle, how many NADH are formed? 

a. 1.0 

b. 2.0 

c. 3.0 

d. 4.0 

Answer- 3.0

Que- Cellular respiration is essentially a/an _____________ process? 

a. Oxidation.  

b. Reduction.  

c. Redox.  

d. None of the above. 

Answer- Oxidation.

Que- ATP are consumed during___________? 

a. Glycolysis  

b. Kreb's cycle  

c. Light dependent phase  

d. none of these 

Answer- Glycolysis

Que- Breaking of terminal phosphate of ATP releases about ___________ Kcal of energy? 

a. 6.1 

b. 6.3 

c. 7.1 

d. 7.3 

Answer- 7.3

Que- Functional units of lungs are called________? 

a. Alveoli  

b. Air sacs  

c. Parabronchi  

d. None of these 

Answer- Air sacs

Que- Lungs are spongy due to the presence of million of___________? 

a. Air sacs  

b. Alveoli  

c. Bronchioles  

d. Parabronchi 

Answer- Alveoli

Que- ___________ respiration is directly involved in the production of energy, necessary for all living activities? 

a. Organismic  

b. Cellular  

c. Both of these  

d. None of these 

Answer- Cellular

Que- Lungs are covered with double layered thin membranous sac called___________? 

a. Disphragm  

b. Pleura  

c. Pericardium  

d. Rib cage 

Answer- Pleura

Que- ___________ respiration is the process by which cell utilized oxygen and produces CO2 ? 

a. Cellular  

b. Organismic  

c. Both of these  

d. None of these 

Answer- Cellular

Que- During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human? 

a. 16-30  

b. 15-20  

c. 5?10  

d. 6?12 

Answer- 15-20

Que- Of the following, which one is better respiratory medium___________? 

a. Air  

b. Water  

c. Soil  

d. None of these 

Answer- Air

Que- The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood. 

a. 10 ml  

b. 20 ml  

c. 30 ml  

d. 40 ml 

Answer- 20 ml

Que- Oxygen contents per liter of air is____________? 

a. 10 ml  

b. 100 ml  

c. 200 ml  

d. 100ml 

Answer- 200 ml

Que- Haemoglobin can be almost completely oxygenated by an oxygen pressure of __________ of mercury. 

a. 10 mm  

b. 60 mm  

c. 10 cm  

d. 100 mm 

Answer- 100 mm

Que- Water is _________ times viscous than air? 

a. 50.0 

b. 1000.0 

c. 5000.0 

d. 8000.0 

Answer- 50.0

Que- Important factors which affect the capacity of haemoglobin to combine with oxygen is 

a. Temperature  

b. Carbon dioxide  

c. pH  

d. All of these 

Answer- All of these

Que- There are _________ stomata per square cm of leaf surface in Tobacco plants? 

a. 1200.0 

b. 12000.0 

c. 100000.0 

d. 1000.0 

Answer- 100000.0

Que- The air spaces may comprise upto _________ of total volume of leaf surface? 

a. 0.3 

b. 0.2 

c. 0.4 

d. 0.5 

Answer- 0.4

Que- The glycolate produced diffuses into the membrane bounded organelles called____________? 

a. Glyoxisomes  

b. Peroxisomes  

c. Lysosomes  

d. Mitochondria 

Answer- Peroxisomes

Que- The increase in pH of blood has ________ effect on the oxygen carrying capacity of haemogolobin? 

a. plus ve  

b. – ve  

c. No  

d. All of these 

Answer- plus ve

Que- Percentage of CO2 carried as carboxyhaemoglobin is_________? 

a. 0.05 

b. 0.7 

c. 0.2 

d. 0.1 

Answer- 0.2

Que- Arterial blood contains _________ of CO2 per 100 ml of blood 

a. 54 ml  

b. 60 ml  

c. 64 ml  

d. 50 ml 

Answer- 50 ml

Que- Active site of Rubisco is evolved to bind? 

a. CO2  

b. O2  

c. H2O  

d.  All of these 

Answer-  All of these

Que- More than ___________ compounds of tar of tobacco smoke are involved to cause cancer? 

a. 5.0 

b. 90.0 

c. 15.0 

d. 10.0 

Answer- 10.0

Que- A disease of longs in which inside of the lungs is damaged resulting in cough and fever? 

a. Lung cancer  

b. Asthma  

c. Emphysema  

d. Pulmonary tuberculosis 

Answer- Emphysema

Que- Number of spiracles present in cockroach is___________? 

a. 15.0 

b. 10.0 

c. 20.0 

d. 30.0 

Answer- 20.0

Que- Of the following, which one is a contagious disease? 

a. Tuberculosis  

b. Lungs cancer  

c. Asthma  

d. Emphysema 

Answer- Tuberculosis

Que- Number of spiracles present in the thorax of cockroach is___________? 

a. 2.0 

b. 3.0 

c. 5.0 

d. 4.0 

Answer- 4.0

Que- Which of the following promotes growth in plants? 

a. Photorespiration  

b. Calvin cycle  

c. Both of these  

d. None of these 

Answer- Calvin cycle

Que- When abdomen expands, the number of spiracles open is_____________? 

a. 2.0 

b. 3.0 

c. 6.0 

d. 8.0 

Answer- 8.0

Que- 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? 

a. Cockroach  

b. Earthworm  

c. Aves  

d. Frogs 

Answer- Aves

Que- The blood enters the ________________ side of heart ? 

a. Posterior  

b. Anterior  

c. Lateral  

d. All possible 

Answer- Posterior

Que- Voice box is another name used for___________? 

a. Buccal cavity  

b. Pharynx  

c. Larynx  

d. Chest Cavity 

Answer- Larynx

Que- All of the following contain cartilage except:___________? 

a. Larynx  

b. Trachea  

c. Bronchi  

d. Bronchioles 

Answer- Bronchioles

Que- Gaseous exchange through the skin is known as ______________ respiration? 

a. Cuticular  

b. Cutaneous  

c. Skin  

d. Pulmonary 

Answer- Cutaneous

Que- Respiratory distress syndrome is common especially for infants with a__________? 

a. Less than 7 month  

b. Less than 8 month  

c. Less than 9 month  

d. More than 9 month 

Answer- Less than 7 month

Que- Parabronchi are open at ______________ end/s? 

a. Single  

b. Both  

c. Do not have opening  

d. None of these 

Answer- Both

Que- In most birds air sacs are ____________ in number? 

a. 10.0 

b. 3.0 

c. 4.0 

d. 9.0 

Answer- 9.0

Que- Vocal cords are stretched across_______? 

a. Larynx  

b. Pharynx  

c. Golttis  

d. None of these 

Answer- Golttis

Que- A joint formed between humerus, radius and ulna is an example of__________? 

a. Immovable joint.  

b. Slightly movable joint.  

c. Freely movable joint.  

d. Fibrous joint 

Answer- Freely movable joint.

Que- Which of the following plays the major role in providing support to young herbaceous parts of the plant? 

a. Living cells of epidermis with higher turgor pressure.  

b. Living cells of cortex and pith with higher turgor pressure.  

c. Collenchyma cells  

d. All of these 

Answer- All of these

Que- Joint between two parietal bones, which is infact immovable one is an example of_________? 

a. Fibrous joints.  

b. Cartilaginous joints.  

c. Synovial joints.  

d. None of these 

Answer- Fibrous joints.

Que- Fibrous capsule surrounding synovial joints may be thickened at some places to form: 

a. Synovial membrane.  

b. Ligaments.  

c. Muscles.  

d. Tendon 

Answer- Ligaments.

Que- Higher turgor pressure in a plant cell is maintained by________________? 

a. Large number of vacoules in a plant cell.  

b. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane  

c. Higher osmotic pressure of the cell vacuole  

d. both b and c 

Answer- both b and c

Que- In which of the following joint muscles are arranged in the same plane as that of joint? 

a. Between radius and ulna.  

b. Between ulna and scapula  

c. Between humerus and scapula  

d. Between femur and tibia. 

Answer- Between femur and tibia.

Que- Which of the following hormone is predominantly responsible for bone weakening in older women? 

a. Progesterone.  

b. Oestrogen.  

c. Parathyroid hormone.  

d. Calcitonin. 

Answer- Oestrogen.

Que- Secondary cell wall of sclerenchyma cells is impregnated with_________________? 

a. Cellulose.  

b. Peptidoglycan and murein.  

c. Lignin.  

d. Pectin. 

Answer- Lignin.

Que- Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency? 

a. Hypocalcaemia Tatanic spasms.  

b. Osteomalacis.  

c. Rickets.  

d. Tetany 

Answer- Rickets.

Que- Among the followings which is the most longest supportive cell? 

a. Tracheids  

b. Sclereids  

c. Trachea  

d. Collenchyma cells 

Answer- Tracheids

Que- Which of the following statement about osteoporosis is incorrect. 

a. It results from estrogen deficiency.  

b. Bone eating process takes over bone formation process.  

c. There is reduction of bone mass and change in chemical composition of the matrix  

d. It is common in old age. 

Answer- There is reduction of bone mass and change in chemical composition of the matrix

Que- An increrase in plant girth due to activity of _____________ is called secondary growth? 

a. Cork cambium  

b. Pith.  

c. Vascular cambium.  

d. Both a and c 

Answer- Both a and c

Que- Which of the following statements about fractures in old age is incorrect? 

a. They are more common than in adult age.  

b. Occur as a result of bone being thin and weak.  

c. Due to good blood supply it results in quick healing.  

d. It involves osteoblasts and osteocytes. 

Answer- Due to good blood supply it results in quick healing.

Que- 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___________? 

a. Open reduction.  

b. Closed Fixation.  

c. Open fixation.  

d. Immobilization 

Answer- Open reduction.

Que- Vascular Cambium initially appears as actively dividing cells between_________________? 

a. Primary Xylem and secondary xylem.  

b. Primary xylem and secondary phloem.  

c. Primary xylem and primary phloem  

d. Secondary xylem and secondary phloem. 

Answer- Primary xylem and primary phloem

Que- A fracture hematoma has____________? 

a. Healing properties.  

b. Destructive properties.  

c. Neutralizing properties.  

d. Dead cells 

Answer- Dead cells

Que- Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ____________? 

a. Chemotropic movement  

b. Chemotactic movement  

c. Chemosastic movement  

d. Haptonastic movement 

Answer- Chemotactic movement

Que- Which of the following cells are involved in soft callus formation? 

a. Fibroblast and osteoblast.  

b. Osteoblast and osteoclast.  

c. Osteoclast and osteocyte  

d. Onteocyte and osteoblast 

Answer- Fibroblast and osteoblast.

Que- Bony callus formation completes in___________? 

a. 2-3 weeks  

b. 3-4 weeks.  

c. 2-3 months.  

d. 3-4 months. 

Answer- 2-3 months.

Que- The place of attachment of leaf with the shoot is called__________? 

a. Pith.  

b. Pit.  

c. Pulvinus  

d. Ecdysone 

Answer- Pulvinus

Que- Which of the following is a uni-nucleated cell? 

a. A smooth muscle cell.  

b. A cardiac muscle cell.  

c. A skeletal muscle cell.  

d. All of these 

Answer- A smooth muscle cell.

Que- Rapid movement of leaves of mimosa on touching is an example of _____________? 

a. Turgor movement  

b. Nastic movement  

c. Tropic movements.  

d. Growth movement 

Answer- Turgor movement

Que- The contraction of which of the following muscle fibers, is controlled by hormones? 

a. A smooth muscle  

b. A cardiac muscle  

c. A skeletal muscle.  

d. All of these 

Answer- A smooth muscle

Que- Roots of a plant show______________? 

a. Positive phototropism and negative geotropism  

b. Negative phototropism and positive geotropism  

c. Negative tactic movement and positive tropic movement  

d. Positive geotropism of stem and roots 

Answer- Negative phototropism and positive geotropism

Que- Why skeletal muscles are called striated muscles? 

a. They appear darker than smooth muscles by naked eye.  

b. Alternating dark and light bands appear on their surface when visualized by naked eye.  

c. Alternating dark and light bands appear on their surface when visualized via a microscope.  

d. All of these 

Answer- Alternating dark and light bands appear on their surface when visualized via a microscope.

Que- Epinasty is controlled by_____________? 

a. Gibberellins  

b. Abscisins  

c. Auxins  

d. Cytokinins 

Answer- Auxins

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