Masterclass Quiz 34 (Revision)

1.

An important evolutionary transition that appeared for the first time in Echinoderms is:

1.	Bilateral symmetry	2.	Radial symmetry
3.	Tube within a tube plan	4.	Endoskeleton

2.

Select the correct statement about hormones and their actions.

1.	Parathyroid hormone increases $K^{+}$ absorption of the body.
2.	Insulin and glucagon help to maintain blood sugar levels.
3.	Old aged people have weak immunity due to increased activity of thymus.
4.	Osteoporosis in women occurs due to increased levels of oestrogens.

3.

What causes the opening of tricuspid and bicuspid valves?
1. Atrial pressure greater than pressure in the ventricles.
2. Ventricular pressure greater than pressure in the arteries.
3. Arterial pressure greater than pressure in the ventricles.
4. Ventricular pressure greater than pressure in the atria.

4.

What happens during the isovolumetric relaxation of the cardiac cycle?
1. the atria contract and pump blood into the ventricles.
2. the ventricles contract and pump blood into the blood vessels.
3. both atria and ventricles are relaxed.
4. the ventricles contract but ventricular pressure is lower than arterial. pressure

5.

10 to 15 distinct conical or triangular structures in the human kidney are seen in renal ______ and are known as renal ____________.

1.	pelvis; calyces	2.	medulla; pyramids
3.	cortex; columns of Bertini	4.	cortex; lobes

6.

The maculae are the sensory organs in the:
1. cochlear duct
2. saccule
3. semicircular canals
4. semicircular ducts

7.

An investment of loose connective tissue entering the liver with the portal vessels and sheathing the larger vessels in their course through the organ is termed as:
1. Falciform ligament
2. Glisson’s capsule
3. Cantlie’s line
4. Ligamentum teres

8.

The largest ankle bone is:
1. cuboid
2. navicular
3. calcaneus
4. talus

9.

Prostate mainly:
1. produces sperms
2. secretes fructose
3. secretes alkaline fluid
4. helps in spermiogenesis

10.

In vertebrate eggs with large yolks, cleavage is described as _______ and results in a ________ on top of the yolk.
1. meroblastic/trophoblast
2. holoblastic/blastodisc
3. meroblastic/blastodisc
4. meroblastic/blastomere

11.

Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion

12.

Which of the following will not be equal in normal physiological conditions?

1.	Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues
2.	Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood
3.	Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli
4.	Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood

13.

In a growing population of a country:

1.	Reproductive and pre-reproductive individuals are equal in number.
2.	Reproductive individuals are less than post-reproductive individuals.
3.	Pre-reproductive individuals are more than reproductive individuals.
4.	Pre-reproductive individuals are less than reproductive individuals.

14.

All the following relations are examples of commensalism except:

1.	Sea anemone and clown fish
2.	Cattle egret and grazing cattle
3.	Barnacles growing on the back of whale
4.	Cuscuta growing on hedge plants

15.

Secondary Succession takes place on/in :
1. Degraded forest
2. Newly created pond
3. Newly cooled lava
4. Bare rock

16.

The accompanying figure represents an ecological pyramid. It is

1.	Pyramid of numbers in a grassland
2.	Pyramid of biomass in a fallow land
3.	Pyramid of biomass in a lake
4.	Energy pyramid in a spring

17.

Climax community is in a state of :
1. Non-equilibrium
2. Equilibrium
3. Disorder
4. Constant change

18.

Among the ecosystem mentioned below, where can one find maximum biodiversity?

1.	Mangroves	2.	Desert
3.	Coral reefs	4.	Alpine meadows

19.

Rachel Carson's famous book "Silent Spring" is related to :
1. Noise pollution
2. Population explosion
3. Ecosystem management
4. Pesticide pollution

20.

It is necessary to remove sulphur from petroleum products to

1.	reduce the emission of sulphur dioxide in exhaust fumes
2.	increase efficiency of automobiles' engines
3.	use sulphur removed from petroleum for commercial purposes
4.	increase the life span of engine silencers

21.

An important limitation of the use of Agrobacterium tumefaciens is that it cannot:

1.	infect dicots
2.	be genetically modified
3.	be cultured on a nutrient medium
4.	infect crop plants such as wheat and corn

22.

Identify a character that is not desirable in a cloning vector:

1.	an inactive promoter
2.	an origin of the replication site
3.	selectable markers such as genes for antibiotic resistance
4.	one or more unique restriction endonuclease sites

23.

Restriction enzymes are synthesized by:

1.	bacteria only	2.	yeast and bacteria
3.	eukaryotic cells only	4.	all kinds of cells

24.

The first transgenic sheep to produce alpha 1 antitrypsin was :

1.	Rosie	2.	Dolly
3.	Tracy	4.	Andy

25.

The use of transgenic animals, to produce relatively large quantities of rare proteins for use in medicine, is sometimes called:

1.	therapeutics	2.	pharming
3.	molecular treatment	4.	biochemistry

26.

A piece of nucleic acid used to find a gene, by forming a hybrid with it, is called a :
1. probe
2. vector
3. restriction sequence
4.retrovirus

27.

In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are :
1. G 17%, A 16.5%,T32.5%
2. G 17%, A 33%,T 33%
3. G8.5%,A50%, T24.5%
4. G 34%,A 24.5%,T 24.5%

28.

A major site for synthesis of lipids is
1. SER
2. Symplast
3. Nucleoplasm
4. RER

29.

In case of poriferans, the spongocoel is lined with flagellated cells called :
1. ostia
2. oscula
3. choanocytes
4. mesenchymal cells

30.

Which one of the followings statements is true for cockroach?

1.	The numbers of ovarioles in each ovary are ten.
2.	The larval stage is called caterpillar.
3.	Anal styles are absent in females.
4.	They are ureotelic.

31.

Interfascicular cambium develops from the cells of:

1. Xylem parenchyma	2. Endodermis
3. Pericycle	4. Medullary rays

32.

Vexillary aestivation is characteristic of the family
1. Fabaceae
2. Asteraceae
3. Solanaceae
4. Brassicaceae

33.

The motile bacteria are able to move by:

1.	fimbriae	2.	flagella
3.	cilia	4.	pili

34.

Male gametophyte with least number of cells is present in:
1. Pteris
2. Funaria
3. Lilium
4. Pinus

35.

Tepal six [3+3], epipetpalous stamens and tricarpellarysyncarpous superior ovary is seen in:
1. Liliaceae
2. Fabaceae
3. Solanaceae
4. Brassicaceae

36.

Root hairs are:
1. unicellular extensions of subsidiary cells
2. unicellular elongations of epidermal cells
3. unicellular elongations of ground tissue cells
4. appendages of the cuticle

37.

The measurement of which of the following would be indicator of the degree of inhibition by a competitive enzyme inhibitor?
1. V_max
2. The y-intercept on a Limeweaver-Burke Plot
3. Km
4. ¼ V_max

38.

Select the correct statement about G₁ phase

1.	Cell is metabolically inactive
2.	DNA in the cell does not replicate
3.	It is not a phase of synthesis of macromolecules
4.	Cell stops growing

39.

Which protists are all heterotrophs and live as predators or parasites?

1.	Desmids	2.	Slime moulds
3.	Protozoans	4.	Euglenoids

40.

Identify the incorrectly matched pair:

1.	Numerical taxonomy	Based on all observable characteristics
2.	Cytotaxonomy	Based on chromosome number, structure and behavior
3.	Chemotaxonomy	Based on chemotrophic mode of nutrition
4.	Phylogenetic system	Based on evolutionary relationships

41.

In which set of organisms does external fertilization occur
1. Echinodermata and mosses
2. Hemichordata and ferns
3. Amphibians and algae
4. Reptiles and gymnosperms

42.

The most common substrate used in distilleries for the production of ethanol is
1. Molasses
2. Corn meal
3. Soya meal
4. Ground gram

43.

Three crops that contribute maximum to global food grain production are
1. wheat , rice and maize
2. Rice, maize and sorghum
3. Wheat, maize and sorghum
4. Wheat, rice and barley

44.

Phenotype of an organism is the result to
1. Mutations and linkages
2. Genotype and environment interactions
3. Cytoplasmic effects and nutrition
4. Environmental changes and sexual dimorphism.

45.

Motile zygote of Plasmodium occurs in
1. Gut of female Anolpheles
2. Salivary glands of Anopheles
3. Human RBCs
4. Human liver

46.

Silencing of mRNA has been used in producing transgenic plants resistant to:

1.	Bollworms	2.	Nematodes
3.	White rusts	4.	Bacterial blights

47.

Filiform apparatus is a characteristic feature of:

1.	Suspensor	2.	Egg
3.	Synergid	4.	Zygote

48.

A sequential expression of a set of human genes occurs when a steroid molecule binds to
1. mRNA
2. DNA sequence
3. tRNA
4. Ribosome

49.

In genetic engineering, the antibiotic resistance gene are used:
1. As selectable markers
2. To select healthy vectors
3. As sequences from where replication starts
4. to keep the cultures free of infection

50.

There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested the African origin of modern man. What kind of observation of DNA variation could suggest?

1.	Greater variation in Asia than in Africa.
2.	Similar variation in Africa and Asia.
3.	Variation only in Asia and no variation in Africa.
4.	Greater variation in Africa than in Asia.

51.

The law of segregation is based on the fact that :
1. The alleles do not show any blending.
2. There is random fertilization
3. Gametes are pure for the trait
4. The zygotes are diploid

52.

Which of the following is not true for the Law of Dominance given by Mendel?

1.	Characters are controlled by discrete units called factors.
2.	Factors occur in pairs.
3.	In a dissimilar pair of factors, one member of the pair dominates the other.
4.	The alleles show blending at the time of fertilization.

53.

The expression of only one of the parental characters in a monohybrid cross in the F₁, the expression of both in the F₂and the proportion of 3:1 obtained at the F₂ can be explained by:
1. Law of Dominance
2. Law of segregation
3. Law of Independent Assortment
4. Two-factor interaction

54.

What is another name for thymine?

1.	5 – bromouracil	2.	3 – bromouracil
3.	3 – methyl uracil	4.	5 – methyl uracil

55. Watson and Crick based their model of DNA on X-ray diffraction data produced by:
1. Hershey and Chase
2. Marie Curie and Pierre Curie
3. Franklin and Wilkins
4. Meselson and Stahl

56.

DNA was first identified by:

1.	Friedrich Meischer	2.	Phoebus Levene
3.	Linus Pauling	4.	Erwin Chargaff

57.

The mechanical carrier of the causative agent of amoebic dysentery is:

1.	A protozoan	2.	House fly
3.	Mosquito	4.	Rodent

58.

How can a healthy man get filariasis?

1.	Through droplet infection from an affected person
2.	Through contaminated water or food
3.	Through sexual contact with an infected person
4.	Through the bite by the female mosquito vector

59.

Which of the following fungus is not a causative organism of ringworm?

1.	Trichoderma	2.	Trichophyton
3.	Microsporum	4.	Epidermophyton

60.

Which of the following is/are a marine plant pollinated by water?

1.	Vallisneria	2.	Hydrilla
3.	Zostera	4.	Both 1 and 2

61.

Identify the plant pollinated by insects that, in many species, emit a scent of decaying flesh from the inflorescence, in order to attract insects:

1.	Yucca	2.	Amorphophallus
3.	Zostera	4.	Vallisneria

62.

Today, all our major food crops are derived from:
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture

63.

Cross hybridisation among the selected parents is frequently used for the improvement of crop plants. Which of the following is not a shortcoming of the process?

1.	The combination of desired characters may always not be possible
2.	It can be a tedious and time-consuming process
3.	Undesirable characters may get introduced
4.	The number of progeny is very limited

64.

The “Biogenetic Law” was given by :

1.	von Baer	2.	Ernst Haeckel
3.	Hugo de Vries	4.	Theodosius Dobzhansky

65.

The extinct reptilian lineage that evolved into dinosaurs and later on the birds is:

1.	Pelycosaurs	2.	Synapsids
3.	Tuataras	4.	Thecodonts

66.

According to the Darwinian concept of evolution, a giraffe has a long neck because:

1.	it was always like that since the beginning
2.	during evolution the number of cervical vertebrae got increased
3.	its ancestors stretched their necks to get food
4.	ancestral giraffes with longer necks got more food and left more surviving offspring

67.

Consider the two statements:

I:	Lifespan of living organisms are correlated with their body size
II:	Almost always, larger the body size more will be the lifespan

1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.

68.

There is no natural death in:
1. Aspergillus niger
2. Escherechia coli
3. Obelia
4. Planaria

69.

The major problem with the use of chemicals to control plant diseases and pests is:
1. High cost
2. Ineffectivity against most pathogens
3. Difficulty in production
4. Non-specific nature

70.

Carrier ions like Na⁺ facilitate the absorption of substances like
1. Amino acids and glucose
2. Glucose and fatty acids
3. Fatty acids and glycerol
4. Fructose and some amino acids

71.

Which of the following hormones is not a secretion product of human placenta?
1. Prolactin
2. Oestrogen
3. Progesterone
4. Human chorionic gonadotropin

72.

The test tube baby programme employs which one of the following techniques?
1. Gamete intra fallopian transfer (GIFT)
2. Zygote intra fallopian transfer (ZIFT)
3. Intra cytoplasmic sperm injection (ICSI)
4. Intra uterine insemination (IUI)

73.

Which one of the following hormones is a modified amino acids?

1. Progesterone	2. Prostaglandin
3. Oestrogen	4. Epinephrine

74.

Which of the following substances, if introduced into the bloodstream, would cause coagulation of blood at the site of its introduction?
1. Thromboplastin
2. Fibrinogen
3. Heparin
4. Prothrombin

75.

In a man, abducens nerve is injured. Which one of the following functions will be affected?
1. Swallowing
2. Movement of the eyeball
3. Movement of the neck
4. Movement of the tongue

76.

Listed below are four respiratory capacities (a-d) and for jumbled respiratory volumes of a normal human adult

Respiratory capacities	Respiratory volumes
a. Residual volume b. Vital capacity c. Inspiratory reserve d. Inspiratory capacity	2500 mL 3500 mL 1200 mL 4500 mL

Which one of the following is the correct matching of two capacities and volumes?
1. (d) 3500 mL (a) 1200 mL
2. (a) 4500 mL (b) 3500 mL
3. (b) 2500 mL (c) 4500 mL
4. (c) 1200 mL (d) 2500 mL

77.

Which of the following pairs is correctly matched?

	Joint	Location
1	Fibrous joint	Between phalanges
2	Cartilaginous joint	Skull bones
3	Gliding joint	Between zygapophysial of the successive vertebrae
4	Hinge joint	Between vertebrae

78.

In ornithine cycle, which of the following wastes are removed from the blood?
1. CO₂ and ammonia
2. Ammonia and urea
3. CO₂ and urea
4. Urea and urine

79.

Pars distalis is:

1.	the posterior lobe of pituitary made of neural tissue
2.	the well developed intermediate lobe of pituitary in humans
3.	the major part of the adenohypophysis
4.	the connection between anterior pituitary and hypothalamus

80.

The releasing hormones and inhibitory hormones secreted by hypothalamus reach anterior pituitary by:

1.	portal circulation	2.	axons
3.	general circulation	4.	lymph

81.

The tongue is a freely movable muscular organ attached to the floor of the oral cavity by the:
1. Lingula
2. Frenulum
3. Foramen caecum
4. Hyoid

82.

Consider the following two statements regarding the epiglottis:
I. It is made of hyaline cartilage
II. It does not have any taste buds
1. I is true but II is false
2. I is false but II is true
3. Both I and II are true
4. Both I and II are false

83.

What regulates the opening of oesophagus into the stomach?
1. A membranous valve
2. A muscular sphincter
3. A mesodermal septum
4. A cartilaginous flap

84.

Each seminiferous tubule is lined by male germ cells called:

1.	Spermatogonia	2.	Primary spermatocytes
3.	Sertoli cells	4.	Leydig cells

85.

The autonomic neural system relays impulse from the CNS to:

I:	skeletal muscles
II:	smooth muscles
III:	involuntary organs

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II and III

86.

In the human eye, there are three types of cones – red blue and green. When these cones are stimulated equally, a sensation for which of the following colors would be produced?

1. White	2. Black
3. Orange	4. Yellow

87.

Leydig cells:

1.	Are present in seminiferous tubules and secrete androgens
2.	Are present in seminiferous tubules and help in the maturation of sperms
3.	Are present in interstitial space and secrete androgens
4.	Are present in interstitial space and help in the maturation of sperms

88.

Most of the neurons in the cerebral cortex are:

1.	Unipolar	2.	Bipolar
3.	Multipolar	4.	Pseudounipolar

89.

The Central Drug Research Institute [CDRI] is located at:

1.	Lucknow	2.	New Delhi
3.	Hyderabad	4.	Pune

90.

“Saheli” is a:

1.	NGO working for female child rights
2.	Mid-wife working in villages to help with child immunization
3.	A national helpline number for the prevention of crimes against wome
4.	New oral contraceptive for females

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