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Biology (Practice Test)

Description: Complete study material for MPPMT Zoology, MPPMT Botany, MPPMT Biology covers Energy, Cell, Life Process, Reproduction System, Skeleton System
Number of Questions: 25
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Tags: MPPMT Zoology MPPMT Botany MPPMT Biology Energy Cell Life Process Reproduction System Skeleton System Evolution Embryogenesis Embryonic Development Nucleic Acids Related Terminology and Classification Diversity in Living World Physiology of Animal and Man Human Physiology
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Adrenal gland is derived from which germ layer?

  1. Ectoderm

  2. Endoderm

  3. Ectoderm and Mesoderm

  4. Ectoderm and Endoderm


Correct Option: C
Explanation:

Adrenal cortex is derived from Mesoderm and Adrenal medulla is derived from Ectoderm.

The golden age of reptiles was :

  1. Proterozoic era

  2. Palaeozoic era

  3. Mesozoic era

  4. Coenozoic era


Correct Option: C
Explanation:

Proterozoic era is the age of early life. Coenozoic era is the age of mammals, birds and angiosperms and Mesozoic era is the age of reptiles. 

Which of the following is found only in RNA but not in DNA?

  1. Adenine

  2. Thymine

  3. Guanine

  4. Uracil


Correct Option: D
Explanation:

Uracil base is found only in RNA and thymine base is found only in DNA whereas adenine, guanine and cytosine bases are common in both DNA and RNA. DNA contain deoxyribose sugar instead of ribose sugar in RNA. 

A condition in which body's internal environment remains relatively constant within limits is called

  1. homeostasis

  2. hemostasis

  3. hematoma

  4. haemopoiesis


Correct Option: A
Explanation:

A condition in whcih body's internal environment remains relatively constant within limits is called homeostasis homeostatic mechanisms protects an animal's internal environment form harmful fluctuations. It enables animals to survive large flucuations in theri external environment by tempering changes in body fluids. 

Radial symmetry is seen in

  1. mollusca

  2. protozoa

  3. starfish

  4. sponges


Correct Option: C
Explanation:

Body symmetry is the similarly of parts in different regions and directions of the body. In radical symmetry a number of similar parts radiate out form a central axis. The body of the individual can be divided into equal halves by any plane passing through the centre from top to bottom. Ex. Some sponges (Sycon) f coelenterates (hydra, jelly fish) echinoderms (e.g., starfish). 

Haversian canals are interconnected by

  1. Hyloid canal

  2. Volkmann's canal

  3. Clockwatt's canal

  4. Schliman's canal


Correct Option: B
Explanation:

The Haversian canals, a characteristic feature of the mammalian bones, are present in the matrix. The Haversian canals are interconnected by transverse canals called Volkmann's canals. 

Cryptorchidism is a condition in which :

  1. testis are excised

  2. testis do not descend in the scrotal sacs

  3. testis do not nourish the sperm

  4. testis cannot produce sperm


Correct Option: B
Explanation:

Cryptorchidism or undescended testis (UDT) is one of the most common pediatric disorders of the male endocrine glands and the most common genital disorder identified at birth.

Maurer's clot are observed in the erythrocytes of man, which are infected with :

  1. P. vivax

  2. P. falciparum

  3. P. ovale

  4. P .malariae


Correct Option: B
Explanation:

Maurer's dots are observed in the erythrocytes of man infected by P. falciparum. It is characterized by the whole sole destructions of the patient's erythrocytes and the excretion of the liberated haemoglobin in the urine. This is called black water fever. 

How many secondary spermatocytes will be required to form 400 spermatozons?

  1. 100

  2. 200

  3. 40

  4. 400


Correct Option: B
Explanation:

200 secondary spermatocytes will be required to form 400 spermatozons.

Echinodermata is a group of animals which are :

  1. coelomate, horny, marine.

  2. coelomate, spiny, marine

  3. acoelomate, spiny, fresh water

  4. joint legged, marine


Correct Option: B
Explanation:

Echinodermates are totally marine, triploblastic, unsegmented and coelomate. Coelom is enterocoel. Larval stage is bilateral and adult is radial in symmetry. In echinodermates short and stout spines are present on the aboral surface which are blunt, immovable and calcareous. 

The origin of kidney and ureter in Rana tigrina is :

  1. all mesodermal

  2. all endodermal

  3. ectodermal and mesodermal

  4. mesodermal and endodermal


Correct Option: A
Explanation:

Embryonic cells differenciate at an early stage and form an outer layer of cells, the ectoderm and an inner layer the endoderm. At the later stage the mesoderm is formed and these three germ layers give rise to all the tissues of the developing embryo. Kidney and ureter in Rana Tigrina is developed from mesodermal layer. 

In mammalian ear, a membranous structure which separates the scala vestibuli and scala media is

  1. Basilar membrane

  2. Reissner's membrane

  3. Autolith membrane

  4. Tectorial membrane


Correct Option: B
Explanation:

Cochlea consists of three fluid filled chambers, the upper scala media, scala vestibule and scala media, which are separated by Reissner's membrane. 

Bile secretion is proportional to :

  1. Protein content of food

  2. Carbohydrate content of food

  3. Oil content of food

  4. Fat content of food


Correct Option: D
Explanation:

Any food that contains fat causes the gallbladder to release bile. The higher the fat content of the food or meal, the more bile is released.

Lampbrush chromosomes are a special type of chromosomes found in

  1. salivary gland cells of dipterans

  2. amphibian oocytes

  3. gonadal cells of reptiles

  4. brain stem cells


Correct Option: B
Explanation:

Lampbrush chromosomes are a special type of chromosomes found in amphibian oocytes. They are found during the prolonged diplotene stage of first meiotic division in primary oocytes of amphibians. 

The blood group which is a universal acceptor is

  1. B

  2. A

  3. AB

  4. O


Correct Option: C
Explanation:

The blood group which is a universal acceptor is AB because plasma from the AB blood type has no antibodies against the antigens of other types, it can be given to anyone without causing an immune reaction.

Thyroid deficiency in infants leads to

  1. hypothyroidism

  2. myxoedema

  3. cretinism

  4. thyrotoxicosis


Correct Option: C
Explanation:

Cretinism is caused by the deficiency of thryoid hormone in infants and myxoedema is caused by the deficiency in adults. Graves disease or exophalmic goitre is caused by the hypersecretion of thyroid hormone. 

Which one of the following was most likely absent in free form in the primordial atmosphere at the time of origin of life?

  1. Methane

  2. Hydrogen

  3. Ammonia

  4. Oxygen


Correct Option: D
Explanation:

Primitive atmosphere chiefly consisting of methane, ammonia, water vapour, hydrogen gas and was reducing. Oxygen was absent in primitive atmosphere. Oxygen came as a result of photosynthesis in green plants. 

The type of placenta found in human beings is :

  1. diffuse

  2. zonary

  3. cotyledonary

  4. meta discoidal


Correct Option: D
Explanation:

 The type of placenta found in human beings is metaiscoidal type. The early blastocyst is first of all covered with villi but later they disappear from its free surface, persisting on a small disc-shaped area, attached to the uterine wall.

Sarcolemma is a membrane sheath of :

  1. muscle fibre

  2. nerve fibre

  3. epithelium tissue

  4. bone and cartilage


Correct Option: A
Explanation:

Sarcolemma is a thin membrane sheath of the muscle fibre.

Mesozoic era is known as

  1. era of birds

  2. era of fishes

  3. era of reptiles

  4. era of mollusca


Correct Option: C
Explanation:

The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous. Each of these periods is divided into many epochs and ages. Mesozoic means "Middle Animal" and is sometimes called the age of reptiles. The term Mesozoic was coined John Phillips in 1840.

In lower vertebrates lymphocytes are produced in

  1. spleen

  2. bone marrow

  3. liver

  4. vertebrae


Correct Option: B
Explanation:

The key cells responsible for immunity in vertebrates are white blood cells called lymphocytes which arise from precursor (stem cells) cells in the bone marrow. B-lymphocytes or B-cells mature in bone marrow while T-lymphocyte or T-cell mature in thymus. 

Crypets of Lieberkuhn are involved in

  1. secretion of succus entericus

  2. secretion of rennin

  3. secretion of ptylin

  4. digestion of food


Correct Option: A
Explanation:

The mucous amembrane of intestinal wall is a single layered eptithelium of tall columber cells with interspersed golbelt cells. Thee epithelial cells have microvilli. In between the villi the mucous membrane is profusely folded and the infolding form pit-like simple tubular intestinal glands or crypts of Leiberkuhn. These secrete the intestinal digestive juice called succus entericus.

Rennin is component of gastric juice secreted from stomach. It secreted in form of inactive proenzyme called prorennin. It changes the soluble casein proein of milk into insoluble semifluid calcium paracaseinate.

Saliva is secreted from salivary glands. The saliva contain ptyalin (salivary amylase) in mammals. 

Which of the following is not a case of epimorphoisis?

  1. Formation of sperms from small clumps of cells

  2. Regeneration of tail in a lizard

  3. Replacement of severed arm in starfish

  4. Replacement of limb in salamander


Correct Option: A
Explanation:

Epimorphosis is a form of development in segmented animals in which body segmentation  is completed before hatching. Formation of sperms for small clumps of cells can not be a case of epimorphosis. 

Wild ass is found in :

  1. U.P.

  2. M.P.

  3. Gujarat

  4. All of these


Correct Option: C
Explanation:

Wild ass is found in Gujarat.

Which of the following does not belong to vitamin B group?

  1. Riboflavin

  2. Nicotine

  3. Cyanocobalamine

  4. Tocopherol


Correct Option: D
Explanation:

Trocopherol, does not belong to vitamin B group tocopherol represents vitamin E which is also known as antisterility vitamin. It is fat soluble vitamin. Other three belong to vitamin B group. Riboflavin is vitamin B2, cyanocobalamine is vitamin B3. These are water soluble vitamins.

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