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Biology (Medical Entrance)

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The organ in fishes which maintains buoyancy is called

  1. myotomes

  2. swim bladder

  3. claspers

  4. labyrinth organ


Correct Option: B
Explanation:

 Gas filled swim bladder helps in maintaining buoyancy.

Flask-shaped cells that line the interior of sponges are known as

  1. lophocytes

  2. sclerocytes

  3. myocytes

  4. choanocytes


Correct Option: D
Explanation:

 Choanocytes are cells which lines the spongocoel in sponges.

The body form of glass sponges is

  1. leuconoid

  2. asconoid

  3. syconoid

  4. asconoid and syconoid


Correct Option: A
Explanation:

 Glass sponges have leuconoid body form in which the interior is almost filled with mesohyl containing a network of chambers.

Cerebral cortex in human brain is made of

  1. white matter

  2. grey matter

  3. corpus callosum

  4. pons varolii


Correct Option: B
Explanation:

 Grey matter is the outer layer of cerebrum comprising the cerebral cortex.

Which of the following is true about sponges?

  1. They have a well developed nervous system.

  2. They are all sessile.

  3. They have a complex digestive system.

  4. They have a complex circulatory system.


Correct Option: B
Explanation:

 Sponges are sessile aquatic animals.

The nerve bundle connecting the two cerebral hemispheres in the human brain is called

  1. cerebellum

  2. neural plate

  3. corpus callosum

  4. medulla oblongata


Correct Option: C
Explanation:

 Corpus callosum is the nerve bundle which connects the two cerebral hemispheres.

The three layers of meninges surrounding the human brain are the

  1. dura mater, pia mater and grey matter

  2. dura mater, white matter and arachnoid mater

  3. dura mater,pia mater and arachnoid mater

  4. pia mater, grey matter and white matter


Correct Option: C
Explanation:

 These are the three layers of meninges surrounding the human brain.

Cardiac muscle fibers helping in contraction of ventricles in human heart through electrical impulse are called

  1. chordae tendineae

  2. papillary muscles

  3. troponins

  4. purkinje fibers


Correct Option: D
Explanation:

 Purkinje fibers are myocardial fibers helping in contraction of ventricles in human heart.

To which sub-phylum of Arthropoda do centipedes and millipedes belong?

  1. Chelicerata

  2. Hexapoda

  3. Myriapoda

  4. Crustacea


Correct Option: C
Explanation:

 Centipedes and milipedes belong to Myriapoda.

Which of the following arthropods gives birth to live young instead of laying eggs?

  1. Millipede

  2. Scorpion

  3. Centipede

  4. Lobster


Correct Option: B
Explanation:

 Scorpion gives birth to live young after the eggs hatch inside the animal.

Roots of hair are located in the

  1. epidermis of skin

  2. reticular region of dermis

  3. papillary region of dermis

  4. hypodermis of skin


Correct Option: B
Explanation:

 Dermis has two layers and roots of hair is present in the inner dermal layer called reticular region.

The mitral valve in human heart is located between the

  1. left atrium and left ventricle

  2. right atrium and right ventricle

  3. left ventricle and aorta

  4. pulmonary valve


Correct Option: A
Explanation:

 The mitral valve or bicuspid valve located between the left atrium and left ventricle, regulates the flow of blood.

Which of the following statements is not true about human skin?

  1. The epidermal layer of skin contains many cells and blood vessels.

  2. Dermis layer is made up of connective tissue.

  3. Dermis contains apocrine,sebaceous,sweat glands and blood vessels

  4. Fibroblasts and adipocytes are found in the hypodermis of skin.


Correct Option: A
Explanation:

 The epidermis does not contain blood vessels

Which of the following enzymes from microbes is used to remove stains?

  1. Proteinase

  2. Pectinase

  3. Lipase

  4. Trypsin


Correct Option: C
Explanation:

Lipase from microbes is used to remove stains.

Name the microorganism that is used to produce citricacid.

  1. Clostridium butylicum

  2. Lactobacillus lacti

  3. Saccharomycetes cerviaceae

  4. Aspergillus niger


Correct Option: D
Explanation:

Citric acid can be produced using Aspergillus niger.

Sebaceous glands are absent in

  1. eyelids and palms of the hands

  2. palms of the hands and soles of the feet

  3. soles of the feet and labia minora

  4. eyelids and labia minora


Correct Option: B
Explanation:

 Sebaceous glands are absent in these hairless areas.

Which muscles in the skin are responsible for goose bumps?

  1. Trichomes

  2. Keratin

  3. Erector pili

  4. Superior rectus


Correct Option: C
Explanation:

Erector pili muscles in skin contract to form goose bumps in which body hair straighten up.

The bacterial group present in cow dung which is useful in biogas production is

  1. halophile

  2. lactobacillus

  3. Thermoacidophile

  4. Methanogen


Correct Option: D
Explanation:

Methanogen is used in the production of biogas.

Specialised sebaceous glands found in the rim of eyelids are called

  1. meibomian glands

  2. apocrine glands

  3. sudoriferous glands

  4. lachrymal glands


Correct Option: A
Explanation:

 Meibomian glands are found in the rim of eyelids and these are sebaceous glands and secrete an oily substance preventing evaporation of tear film in the eyes.

The microorganism used in beverage industry is

  1. saccharomycetes

  2. lactobacillus

  3. clostridium

  4. bacillus


Correct Option: A
Explanation:

Saccharomyces is used in beverage industry.

The blood chlesterol reducing substance called statin, is obtained from

  1. trichoderma polysporum

  2. monascus perpureus

  3. aspergillus niger

  4. lactobacillus lacti


Correct Option: B
Explanation:

Monascus perpureus produces statin.

Methanogens used in making biogas are

  1. virus

  2. fungus

  3. algae

  4. bacteria


Correct Option: D
Explanation:

Methanogens used in making biogas are bacteria.

An enzyme used in detergent formulation obtained from microbe is

  1. pectinase

  2. proteinase

  3. lipase

  4. amylase


Correct Option: C
Explanation:

Lipase is an enzyme used in detergent formulation obtained from microbe.

The large holes in swiss cheese is due to Co2 production with the help of

  1. Aspergillus niger

  2. Saccharomycetes cerviaceae

  3. Propionibacterium shermanii

  4. Lactobacillus


Correct Option: C
Explanation:

The large holes  in Swiss cheese are due to CO2 production with the help of  Propionibacterium shermanii.

A bacterium which acts as a biofertilizer in association with leguminous plant is

  1. acetobacter

  2. clostridium

  3. rhizobium

  4. azospirillum


Correct Option: C
Explanation:

Rhizobium is a bacteria which acts as a biofertilizer in association with leguminous plant.

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