Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 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 

a. Chlorophyll a 

b. Chlorophyll b 

c. Xanthophyll 

d. Carotenes 

Answer- Chlorophyll a

Que- Bacteriochlorophylls does not include 

a. Chlorophyll e 

b. Chlorophyll d 

c. Chlorophyll a 

d. Chlorophyll c 

Answer- Chlorophyll a

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- Carotenoids perform protective function in 

a. Animals 

b. Plants 

c. Both of these 

d. None of these 

Answer- Both of these

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- 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- 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- The percentage of light absorbed by the leaf 

a. 0.2 

b. 0.15 

c. 0.1 

d. 0.01 

Answer- 0.01

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- First Actions spectrum was obtained by using 

a. Algae 

b. Fungi 

c. Bacteria 

d. Spirogyra 

Answer- Spirogyra

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- 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- Stomata cover only _________ of leaf surface. 

a. 0.03 - 0.04% 

b. 0.1 

c. 1-2 % 

d. 0.5 

Answer- 1-2 %

Que- Reduction in photosynthesis is of 

a. O2 

b. CO2 

c. H2O 

d. light energy 

Answer- CO2

Que- NADPH2 provides 

a. assimilatory power 

b. chemical energy 

c. energized electrons 

d. All of these 

Answer- All of these

Que- Of the following, which one light - gathering 

a. Antenna complex 

b. Reaction centre 

c. Photosystem 

d. None of these 

Answer- Antenna complex

Que- Photosystem II has molecules which absorbs maximum light of 

a. 680 nm 

b. 100 m 

c. 700 nm 

d. 670 nm 

Answer- 680 nm

Que- Glycolysis takes place in: 

a. Nucleus 

b. Cytosol 

c. Mitochondria. 

d. Ribosomes 

Answer- Cytosol

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- In alcoholic fermentation Pyruvic acid is broken down into: 

a. Acetaldehyde 

b. Methyl alcohol 

c. Ethyl alcohol. 

d. Lactic acid. 

Answer- Ethyl alcohol.

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- 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- 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- 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- Final acceptor of electrons in respiratory chain is 

a. NADH 

b. Cytochrome a3 

c. Water 

d. Oxygen 

Answer- Oxygen

Que- Carbohydrates, fats & proteins are essential for: 

a. Metabolic processes of an organism 

b. Providing energy 

c. Formation of sturctures 

d. All of these 

Answer- All of these

Que- Magnesium is present in which of the following? 

a. Cytochromes 

b. ATP 

c. Chlorophyll 

d. Haemoglobin 

Answer- Chlorophyll

Que- Deficiency of which of the following causes chlorosis? 

a. Nitrogen 

b. Magnesium 

c. Iron 

d. Both A and B 

Answer- Both A and B

Que- Deficiency of K+ causes: 

a. Stunted growth & strong chlorosis 

b. No electron transport chains 

c. Premature death of leaves. 

d. Stunted growth of roots. 

Answer- Premature death of leaves.

Que- Puccinia is a parasitic: 

a. Plant 

b. Fungus 

c. Animal 

d. Algae 

Answer- Fungus

Que- Autotrophic organisms can exist in an exclusively ______ environment. 

a. Organic 

b. Inorganic 

c. Wet 

d. Terrestrial 

Answer- Inorganic

Que- Strong chlorosis is due to the deficiency of _____ in plants. 

a. Magnesium 

b. Nitrogen 

c. Potassium 

d. Phosphorus 

Answer- Nitrogen

Que- Stunted growth of roots is due to the deficiency of _____ in plants 

a. Potassium 

b. Magnesium 

c. Phosphorus 

d. Iron. 

Answer- Phosphorus

Que- Puccinia commonly destroys 

a. Corn 

b. Tomato 

c. Dodder 

d. Wheat 

Answer- Wheat

Que- Nodules on roots of leguminous plants have _____ bacteria 

a. Anaerobic 

b. Nitrogen fixing 

c. Nitrifying 

d. Ammonifying 

Answer- Nitrogen fixing

Que- All of the insectivorous plants are true 

a. Heterotrophs 

b. Autotrophes 

c. Carnivores 

d. Saprotrophs 

Answer- Autotrophes

Que- The leaf is bilobed with midrib between them. The plant is 

a. Saraccnia 

b. Dionaea 

c. Pitcher plant 

d. None of these 

Answer- Dionaea

Que- Of the following, which one has more variety of nutrition? 

a. Animals 

b. Bacteria 

c. Plants 

d. Fungi 

Answer- Animals

Que- Earthworm is an example of ______ feeder 

a. Detritus 

b. Fluid 

c. Macrophageus 

d. Filter 

Answer- Detritus

Que- Of the following, which one is missing in herbivores? 

a. Premolars 

b. Canines 

c. Incisors 

d. Molars. 

Answer- Canines

Que- Certain types of whales are also ______ feeder. 

a. Fluid 

b. Macrophagous 

c. Filter 

d. None of these 

Answer- Filter

Que- Hydra is an example of _______ feeder 

a. Fluid 

b. Macrophagous 

c. Fluid 

d. All of these 

Answer- Macrophagous

Que- Parasites capable of living independently of its host at times is called as _______ parasite. 

a. Obligate 

b. Strict 

c. Facultative 

d. Endoparasite 

Answer- Facultative

Que- In planaria, numerous small branches which end blindly are called as 

a. Digestive tract 

b. Intestinal caeca 

c. Hepatic caeca 

d. Both B & C 

Answer- Intestinal caeca

Que- Midgut in cockroach is a short narrow tube called 

a. Hepatic caeca 

b. Gizzard 

c. Stomach 

d. Rectum 

Answer- Stomach

Que- The partly digested food is stored in ____ in cockroach. 

a. Gizzard 

b. Crop 

c. Hepatic caeca 

d. Rectum 

Answer- Crop

Que- Hunger contractions are _____ contractions 

a. Antiperistalsis 

b. Peristalsis 

c. Voluntary 

d. None of these 

Answer- Peristalsis

Que- A painful burning sensation produced in the chest cavity usually associated with the back flush of acidic chyme into the esophagus is 

a. Pyrolysis 

b. Pyrosis 

c. Peristalsis 

d. Dyspepsia 

Answer- Pyrosis

Que- Hepatic and Pancreatic secretions are also stimulated by a hormone produced by the intestinal mucosa. The hormone is 

a. Creatin 

b. Gastrin 

c. Secretin 

d. Pepsin 

Answer- Secretin

Que- Anus is surrounded by _____ types of muscles 

a. 2.0 

b. 3.0 

c. 1.0 

d. 4.0 

Answer- 2.0

Que- Incomplete or imperfect digestion is known as 

a. Obesity 

b. Dyspepsia 

c. Anorexia nervous 

d. Bulimia nervosa 

Answer- Dyspepsia

Que- One of the commonest cause of food poisoning are the toxins produced by 

a. Azobacter 

b. Nitrosomonas 

c. Campylobacter 

d. Nitrobacter 

Answer- Campylobacter

Que- The liquid that escapes during defrosting frozen meat contains _____ bacteria 

a. Campylobacter 

b. Nitrobacter 

c. Azobacter 

d. Salmonella 

Answer- Salmonella

Que- Loss of appetite due to the fear of becoming obese is 

a. Anorexia nervosa 

b. Bulimia nervosa 

c. Piles 

d. Dyspepsia 

Answer- Anorexia nervosa

Que- An illness which largely affects girls usually just after the onset of puberty. 

a. Bulimia nervosa 

b. Obesity 

c. Anorexia nervosa 

d. None of these 

Answer- Anorexia nervosa

Que- Masses of dilated tortuous veins in the anorectal mucosa are known as 

a. Bulimia 

b. Ulcer 

c. Adipose tissue 

d. Hemorrhoids 

Answer- Hemorrhoids

Que- Mastication is carried out by: 

a. Teeth 

b. Tongue 

c. Smooth muscles 

d. All of these 

Answer- Teeth

Que- Dipeptides into amino acids are are converted through 

a. Amino peptidase 

b. Erypsin 

c. Pepsin 

d. Trypsin 

Answer- Erypsin

Que- Pepsinogen is produced from 

a. Mucous cells 

b. Parietal cells 

c. Zymogen cells 

d. All of these 

Answer- Zymogen cells

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- ______ 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- Of the following, which one is better respiratory medium. 

a. Air 

b. Water 

c. Soil 

d. None of these 

Answer- Air

Que- Oxygen contents per liter of air is 

a. 10 ml 

b. 100 ml 

c. 200 ml 

d. 100ml 

Answer- 200 ml

Que- Water is _____ times viscous than air 

a. 50.0 

b. 1000.0 

c. 5000.0 

d. 8000.0 

Answer- 50.0

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- 12000.0

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- Active site of Rubisco is evolved to bind 

a. CO2 

b. O2 

c. Both of these 

d. H2O 

Answer- Both of these

Que- Number of spiracles present in cockroach is 

a. 15.0 

b. 10.0 

c. 20.0 

d. 30.0 

Answer- 20.0

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- 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- The blood enters the _____ side of heart 

a. Posterior 

b. Anterior 

c. Lateral 

d. All possible 

Answer- Posterior

Que- Gaseous exchange through the skin is known as ______ respiration. 

a. Cuticular 

b. Cutaneous 

c. Skin 

d. Pulmonary 

Answer- Cutaneous

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- 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- Lungs are covered with double layered thin membranous sac called 

a. Disphragm 

b. Pleura 

c. Pericardium 

d. Rib cage 

Answer- Pleura

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

a. 10 mm 

b. 60 mm 

c. 10 cm 

d. 100mm 

Answer- 100mm

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

a. Tuberculosis 

b. Lungs cancer 

c. Asthma 

d. Emphysema 

Answer- Tuberculosis

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- 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- 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- 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- There are _______ types of nutrients needed by plants besides light to carry out photosynthesis 

a. Two 

b. Three 

c. Four 

d. Five 

Answer- Three

Que- The site/s where most of the uptake of water and minerals take place is/are 

a. Root hairs 

b. Root cells 

c. Underground stem 

d. All of these 

Answer- Root hairs

Que- The uptake of water in plants involves 

a. Active transport 

b. Passive transport 

c. Both of these 

d. None of these 

Answer- Passive transport

Que- The membrane of vacuoles is known as 

a. Vacuoloplast 

b. Tonoplast 

c. Tanoplast 

d. All of these 

Answer- Tonoplast

Que- The diffusion of ions along with water also takes place by mass flow system along the ______ path 

a. Tonoplast 

b. Apoplast 

c. Symplast 

d. Vacuolar 

Answer- Apoplast

Que- Active transport is dependent on 

a. Photosynthesis 

b. Respiration 

c. Photophosporylation 

d. None of these 

Answer- Respiration

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