laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 21

 Which of the following is not a characteristic of the phylum Arthropoda?

1. Metameric segmentation
2. Jointed appendages
3. Chitinous exoskeleton
4. Parapodia

✅ Correct Answer: 4

This is an example of bilaterally symmetrical and triploblastic animal

1. cnidarians
2. sponges
3. ctenophores
4. round worms

✅ Correct Answer: 4

Phylum Annelida is not characterized by

1. segmentation
2. closed circulatory system
3. ventral nerve chord
4. pseudocoelom

✅ Correct Answer: 4

Which of the following contains notochord in the embryonic stage?

1. Non-chordates
2. Vertebrates
3. All chordates
4. Some of the chordates

✅ Correct Answer: 3

A characteristic feature; which is present only in the phylum Coelenterata is

1. nematocysts
2. flame cells
3. hermaphroditism
4. polymorphism

✅ Correct Answer: 1

Cnidarians; which exhibit only polyp stage

1. Cubozoa
2. Scyphozoa
3. Anthozoa
4. Hydrozoa

✅ Correct Answer: 3

Excretion is performed by _______ in flatworms

1. protonephridia
2. flame cells
3. green glands
4. malpighian tubules

✅ Correct Answer: 2

The group of molluscs; which possess eyes similar to vertebrates

1. bivalvia
2. gastropoda
3. cephalopoda
4. pelecypoda

✅ Correct Answer: 3

Tube feet are found in

1. cuttlefish
2. crayfish
3. jellyfish
4. starfish

✅ Correct Answer: 4

Which of the following is used as a biocontrol agent against caterpillars of butterflies?

1. Trichoderma
2. Streptococcus
3. Bacillus Thuringiensis
4. Saccharomyces cerevisiae

✅ Correct Answer: 3

Which of the following is the use of microbes as a biological control agent for pests/diseases?

1. Bt-cotton to increase the yield of cotton
2. Ladybird beetle for controlling aphids in mustard
3. Trichoderma sp against plant pathogens
4. Nucleopolyhedrovirus against white rust in Brassica

✅ Correct Answer: 3

A biocontrol agent against plant diseases

1. Trichoderma
2. Glomus
3. Bacillus thuringiensis
4. baculovirus

✅ Correct Answer: 1

Which of the following is not a biopesticide?

1. Nucleopolyhedrovirus
2. Xanthomonas campestris
3. Bacillus thuringiensis
4. Trichoderma harzianum

✅ Correct Answer: 2

Trichoderma harzianum is used for

1. wasteland reclamation
2. bioremediation of contaminated soil
3. biocontrol agent against plant pathogens
4. gene transfer

✅ Correct Answer: 3

Which of the following is a biocontrol agent for nematodal diseases?

1. Pseudomonas cepacia
2. Pisolithus tinctorius
3. Paecilomyces lilacinus
4. Gliocladium virens

✅ Correct Answer: 3

This is a third generation pesticide.

1. Pheromones
2. Pathogens
3. Carbamates and organophosphates
4. Insect repellants

✅ Correct Answer: 1

Cochineal insects are used for

1. Parthenium control
2. weeds control
3. Eicchornia prevention
4. Cactus prevention

✅ Correct Answer: 4

The process of using a natural predator to control a pathogen is called

1. genetic engineering
2. biological control
3. confusion technique
4. artificial control

✅ Correct Answer: 2

Rotenone is used as

1. bioherbicide
2. insect hormone
3. natural insecticide
4. natural herbicide

✅ Correct Answer: 3

Which of the following ions is responsible for unmasking of active binding sites on actin for forming cross-bridge during muscle contraction?

1. Potassium
2. Magnesium
3. Sodium
4. Calcium

✅ Correct Answer: 4

Sliding theory states that

1. actin and myosin filaments shorten and slide past each other
2. when myofilaments slide past each other; shortening of actin filaments occur
3. when myofilaments slide past each other; shortening of myosin filaments occur
4. actin and myosin filaments do not shorten; they only slide past each other

✅ Correct Answer: 4

Which of the following is correct for muscle contraction?

1. Shortening of actin filaments
2. Shortening of A; H and I bands
3. No change in A bands
4. Sarcomere do not shorten

✅ Correct Answer: 3

Which of the following shows ATPase activity during muscle contraction?

1. Actin
2. Tropomyosin
3. Troponin
4. Myosin

✅ Correct Answer: 4

Which of the following is correct for muscle contraction?

1. Distance between two Z line increases
2. Length of I band increases
3. Length of A band remains constant
4. Length of H zone increases

✅ Correct Answer: 3

Sarcomere is

1. the part between two Z-lines
2. the part between two I-bands
3. the part between two A-lines
4. the part between two H-lines

✅ Correct Answer: 1

This is a contractile protein of muscles

1. Myosin
2. Tubulin
3. Tropomyosin
4. All of the above

✅ Correct Answer: 1

Which of the following is a functional unit of striated muscles?

1. Myofibril
2. Cross-bridges
3. Z-band
4. Sarcomere

✅ Correct Answer: 4

When actin filaments are dragged towards M-line; it is known as

1. recovery stroke
2. refractory stroke
3. power stroke
4. none of the above

✅ Correct Answer: 3

Accumulation of __________ causes muscle fatigue.

1. lactic acid
2. myosin ATPase
3. carbon dioxide
4. none of the above

✅ Correct Answer: 1

This weed has been eradicated by biological control

1. Chrysanthemum
2. Cactus
3. Parthenium
4. Eichhornia

✅ Correct Answer: 2

The phenomenon of using a predator to control pests is

1. artificial control
2. biological control
3. confusion technique
4. genetic engineering

✅ Correct Answer: 2

This is an effective plant insecticide

1. Nicotine
2. Cinerin
3. Pyrethrin
4. all of these

✅ Correct Answer: 4

The pheromone coated paper strips in the confusion technique are thrown over an area to

1. confuse males so that they are unable to locate females
2. repel insects from a region
3. confuse females so that they are unable to locate males
4. attract insects and kill them

✅ Correct Answer: 1

Devine” and “Collego” are two agricultural substances used as

1. Insect hormones
2. Biofertilizers
3. Bioherbicides
4. Natural insecticides

✅ Correct Answer: 3

Rotenone is a

1. insect hormone
2. natural insecticide
3. bioherbicide
4. natural herbicide

✅ Correct Answer: 2

The wild growth of ______ is checked with Cochineal insect

1. screwworm
2. aphids
3. Eichhornia
4. Opuntia

✅ Correct Answer: 4

Pyrethrin is extracted from

1. Poa indica
2. Helianthus annuus
3. Azadirachta indica
4. Chrysanthemum cinerariifolium

✅ Correct Answer: 4

In 1981; the first bioherbicide developed was based on

1. Azadirachta indica
2. Bacillus thuringiensis
3. Phytophthora infestans
4. Phytophthora palmivora

✅ Correct Answer: 4

Transgenic crop developed to tolerate herbicides is

1. Tomato
2. sunflower
3. Tobacco
4. both (a) and (b)

✅ Correct Answer: 3

The blood is transported to the liver by hepatic portal vein from which part of the body?

1. Kidney
2. Heart
3. Intestine
4. None of the above

✅ Correct Answer: 3

Which of the following blood vessels contain blood with the largest amount of urea?

1. Dorsal aorta
2. Hepatic portal vein
3. Renal vein
4. Hepatic vein

✅ Correct Answer: 4

Which of the following blood vessels does not contain valves?

1. Systemic aorta
2. Pulmonary aorta
3. Veins
4. Arteries

✅ Correct Answer: 4

The vein having the lowest amount of urea is

1. renal vein
2. hepatic portal vein
3. hepatic vein
4. pulmonary vein

✅ Correct Answer: 1

The veins from the stomach; intestine; pancreas and spleen drain into

1. superior portal vein
2. hepatic portal vein
3. inferior portal vein
4. superior dorsal vein

✅ Correct Answer: 2

The hepatic portal system carries blood from

1. liver to the digestive system
2. liver to kidneys
3. digestive system to the liver
4. kidneys to liver

✅ Correct Answer: 3

Which of the following blood vessels carries glucose from the digestive tract to the liver?

1. Hepatic portal vein
2. Hepatic artery
3. Pulmonary vein
4. None of the above

✅ Correct Answer: 1

Which of the following veins does not drain into the hepatic portal vein?

1. Superior mesenteric
2. Left gastric
3. Splenic
4. Renal

✅ Correct Answer: 4

Superior rectal vein drains into

1. portal vein
2. inferior vena cava
3. superior mesenteric vein
4. none of the above

✅ Correct Answer: 1

The blood is transported to the liver by hepatic portal vein from which part of the body?

1. Kidney
2. Heart
3. Stomach
4. None of the above

✅ Correct Answer: 3

Which of the following is correct for the partial pressure of oxygen in alveoli?

1. less than carbon dioxide
2. less than the blood
3. more than the blood
4. equal to that of the blood

✅ Correct Answer: 3

Which of the following is a chronic respiratory disorder caused by smoking?

1. Asthma
2. Emphysema
3. Respiratory alkalosis
4. Respiratory acidosis

✅ Correct Answer: 2

Most of the carbon dioxide produced in the tissues is transported to the lungs as

1. carbonates
2. bicarbonates
3. dissolved in the blood
4. attached to haemoglobin

✅ Correct Answer: 2

The gaseous exchange in alveoli is a type of

1. simple diffusion
2. osmosis
3. active transport
4. passive transport

✅ Correct Answer: 1

The linings that separate air contained in lungs from venous blood

1. squamous epithelium and tunica media
2. squamous epithelium and endothelium
3. transitional epithelium and tunica externa
4. none of the above

✅ Correct Answer: 2

Which of the following organs only receives oxygenated blood?

1. Lungs
2. Gills
3. Liver
4. Spleen

✅ Correct Answer: 4

Which of the following parts of the brain regulates the respiratory process?

1. The vagus nerve
2. Cerebral peduncle
3. Medulla oblongata
4. Cerebellum

✅ Correct Answer: 3

Which of the following membranes encloses lungs?

1. Pleural membrane
2. Pericardium
3. Perichondrium
4. Periosteum

✅ Correct Answer: 1

RBCs present in the blood of a person residing at higher altitudes

1. decrease in size
2. increase in size
3. decrease in the number
4. increase in the number

✅ Correct Answer: 4

The alveolar epithelium of lungs is

1. ciliated squamous
2. nonciliated squamous
3. nonciliated columnar
4. ciliated columnar

✅ Correct Answer: 2

These cells of ‘Crypts of Lieberkuhn’ secrete lysozyme

1. Argentaffin cells
2. Kupffer cells
3. Zymogen cells
4. Paneth cells

✅ Correct Answer: 4

The opening of the hepatopancreatic duct into the duodenum is guarded by

1. Ileocaecal valve
2. Semilunar valve
3. Sphincter of Oddi
4. Pyloric sphincter

✅ Correct Answer: 3

Which of the following cells secretes gastric acid in the stomach?

1. Parietal cells
2. Chief cells
3. Acidic cells
4. Peptic cells

✅ Correct Answer: 1

Which part of the digestive system contains symbiotic microorganisms?

1. Duodenum
2. Appendix and rectum
3. Oral cavity and tongue
4. Caecum

✅ Correct Answer: 4

Which of the following is present on the surface of the epithelial lining of the intestine and help in the absorption of digested food?

1. Phagocytic vesicles
2. Zymogen granules
3. Microvilli
4. Pinocytic vesicles

✅ Correct Answer: 3

Which of the following parts of the digestive system contains Brunner’s glands?

1. Duodenum
2. Ileum
3. Oesophagus
4. Stomach

✅ Correct Answer: 1

Which part of the digestive system contains lacteals?

1. Ischem
2. Ileum
3. Pharynx
4. Oesophagus

✅ Correct Answer: 2

The cells which secrete tooth enamel are known as

1. ameloblast
2. dentoblast
3. odontoblast
4. osteoblast

✅ Correct Answer: 1

Kupffer’s cells are found in

1. liver
2. brain
3. kidney
4. spleen

✅ Correct Answer: 1

Chief cells are present in

1. duodenum
2. pyloric region of stomach
3. fundic region of stomach
4. cardiac region of stomach

✅ Correct Answer: 3

Which of the following plants is an example of a cryptogam with vascular tissues?

1. Equisetum
2. Cedrus
3. Marchantia
4. Ginkgo

✅ Correct Answer: 1