Mix Test

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Mix Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Pollination by moth is known as

A
phalaenophily

B
melittophily

C
psycophily

D
myophily

Solution

Phalaenophily is the pollination by moth. They pollinate nocturnal flowers with good scent and nectar.
Question 2
1 / -0

Which of the following leucocytes has multilobed nucleus?

A
Neutrophil

B
Eosinophil

C
Monocyte

D
Basophil

Solution

It has multilobed nucleus.
Question 3
1 / -0

Which theory states that thymus and brain are the main factors in ageing?

A
Mutation theory

B
Gene theory

C
Stress theory

D
Pacemaker theory

Solution

Aging pacemaker theory suggests that one cell or one type of tissue interferes with cell proliferation, thereby initiating the process of senescence throughout the body.
Question 4
1 / -0

In ornithine cycle, which of the following wastes are removed from the blood?

A
CO₂ and ammonia

B
Ammonia and urea

C
CO₂ and urea

D
Urea and urine

Solution

In ornithine cycle, CO₂ and ammonia wastes are removed from the blood. In mammals, this cycle takes place primarily in the liver, and to a lesser extent in the kidney.
Question 5
1 / -0

Which of the following is formed along with ATP in glycolysis?

A
NADH

B
NADPH

C
FAD

D
FADH₂

Solution

NADH is formed along with ATP in glycolysis.

Question 6

1 / -0

Match list I with list II.

List I	List II
I. Yolk sac	A. Elimination of metabolic wastes
II. Chorion	B. Shock absorption
III. Allantois	C. Food storage and digestion
IV. Amnion	D. Exchange of substances between mother and embryo

I – D, II – C, III – A, IV – B

I – D, II – C, III – B, IV – A

I – C, II – D, III – B, IV – A

I – C, II – D, III – A, IV – B

Solution

The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast adjacent to the embryonic disk. Yolk sac stores food and digests it.
Chorion is the outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals it contributes to the formation of the placenta.Chorion exchanges the substances between mother and embryo.
The allantois is a hollow sac-like structure filled with clear fluid that forms part of a developing amniote's conceptus (which consists of all embryonic and extra-embryonic tissues). It helps the embryo exchange gases and handle liquid waste.
The amnion is a membrane that closely covers the embryo. Amnion acts as shock-absorbing cushion.

Question 7

1 / -0

Match the following:

Column I	Column II
A. Acrosin	i. facilitation of sperm attachment to ovum
B. Proteolytic enzyme	ii. dispension of corona cells
C. Binding protein	iii. breakdown of ovum membrane at sperm contact
D. Hyaluronidase	iv. facilitation of sperm penetration into ovum

A - iii, B - iv, C - i, D - ii

A - ii, B - i, C - iv, D - iii

A - iii, B - ii, C - iv, D - i

A - ii, B - iv, C - i, D - iii

Solution

Acrosin helps breakdown of ovum membrane at sperm contact
Proteolytic enzyme facilitation of sperm penetration into ovum.
Binding protein facilitation of sperm attachment to ovum
Hyaluronidase hydrolyses dispension of corona cells

Question 8
1 / -0

Which of the following hormones is responsible for Conn's syndrome?

A
Aldosterone

B
ADH

C
ACTH

D
None of these

Solution

Primary aldosteronism, also sometimes called Conn's syndrome, is an endocrine disorder characterised by excessive secretion of the hormone aldosterone from the adrenal glands. This overproduction leads to the retention of sodium and loss of potassium in the body, resulting in high blood pressure (hypertension).
Question 9
1 / -0

The structure 'typhlosole' in earthworms is used for

A
crushing food

B
slowing down the passage of food

C
increasing the absorptive area

D
extra secretion of digestive enzymes

Solution

The structure 'typhlosole' in earthworms is used for increasing the absorptive surface area, which increases the rate of nutrient absorption. It runs mid-dorsally from 27^th to last 25^th segment.
Question 10
1 / -0

How does pruning of plants promote branching?

A
The activity of ethylene decreases.

B
Auxiliary buds get sensitised to gibberellin.

C
Auxiliary buds get sensitised to cytokinin.

D
The activity of abscisic acid decreases.

Solution

Severing branches during the pruning process interrupts or disconnects the chemical pathways that influence root and shoot growth, the auxin-cytokinin pathway. Basically, the cytokinins follow the established route until the top of the branch is removed through pruning. Due to the missing shoot which produces auxin, the latent buds on the truncated branches break dormancy; develop new stems; and produce new, weakly attached shoots. The concentration of cytokinins increases, flushing new growth below the location of the cut.
Question 11
1 / -0

Which of the following is a synthetic plant hormone?

A
2,4-D

B
IAA

C
GA

D
Zeatin

Solution

2,4-D is a synthetic auxin, which is a class of plant hormones, which results in uncontrolled growth and eventually death in susceptible plants. So, it is used as a systemic herbicide which selectively kills most broad leaf weeds by causing uncontrolled growth in them but leaves of most grasses such as cereals, lawn turf and grassland are relatively unaffected.
Question 12
1 / -0

In sickle-cell anaemia, the amino acid

A
glutamic acid is substituted by valine

B
valine is substituted by glutamic acid

C
glutamic acid is substituted by leucine

D
leucine is substituted by glutamic acid

Solution

The mutation causing sickle-cell anaemia is a single nucleotide substitution (A to T) in the codon for amino acid 6. The change converts a glutamic acid codon (GAG) to a valine codon (GTG). The form of haemoglobin in persons with sickle-cell anaemia is referred to as HbS.
Question 13
1 / -0

This cell has a role in water absorption. It commonly bears long hair-like parts. It also helps in transpiration. It is flat. Which cells are being referred to here?

A
Cork cells

B
Phloem cells

C
Epidermal cells

D
Xylem cells

Solution

Transpiration refers to loss of water from leaf surface. Only guard cells and epidermal cells are involved in it. But, only epidermal cells are flat and bear long hair.
Question 14
1 / -0

A system of membrane-bound vesicles of golgi apparatus, which are arranged parallel to each other in bundles, is known as

A
cisterns

B
golgi body

C
cristae

D
lysosome

Solution

Golgi apparatus consists of a system of membrane-bound vesicles arranged approximately parallel to each other in bundles or stacks called cisterns.

Question 15

1 / -0

Which of the following matchings are correct?

A. Claspers	Scoliodon
B. Jacobson's organ	Lizards
C. Amplexus	Frog
D. Furcula	Birds
E. Baleen	Whales

Only A, B, C, D

Only A, C, D, E

Only B, C, D, E

All are correct.

Solution

The male sharks have grooved organs that are used to deposit sperm into the genital duct of sexually receptive female sharks. These organs, called as 'claspers', are developed along the inner margin of each pelvic fin. Scoliodon is the shark and hence it possesses claspers.
The vomeronasal organ (VNO), or Jacobson's organ, is the paired auxiliary olfactory (smell) sense organ located in the soft tissue of the nasal septum, in the nasal cavity just above the roof of the mouth (the hard palate). It is seen in lizards.
Frogs mate in a position called amplexus, with the smaller male clasping the female from behind in a ride that can last two days or more. As female lays eggs, male expels sperm to fertilise them.
The furcula or wishbone is a forked bone found in birds and some other species of dinosaurs, and is formed by the fusion of the two clavicles. In birds, its primary function is in the strengthening of the thoracic skeleton to withstand the rigors of flight.
Baleen is a filter-feeder system inside the mouths of baleen whales. The baleen system works by a whale opening its mouth underwater and taking in water. The whale then pushes the water out, and animals such as krill are filtered by the baleen and remain as a food source for the whale.

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Re-Attempt Weekly Quiz Competition

Mix Test - 7

Result

Mix Test - 7

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Rank

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SHARING IS CARING

Question 1

phalaenophily

melittophily

psycophily

myophily

Solution

Question 2

Neutrophil

Eosinophil

Monocyte

Basophil

Solution

Question 3

Mutation theory

Gene theory

Stress theory

Pacemaker theory

Solution

Question 4

CO2 and ammonia

Ammonia and urea

CO2 and urea

Urea and urine

Solution

Question 5

NADH

NADPH

FAD

FADH2

Solution

Question 6

I – D, II – C, III – A, IV – B

I – D, II – C, III – B, IV – A

I – C, II – D, III – B, IV – A

I – C, II – D, III – A, IV – B

Solution

Question 7

A - iii, B - iv, C - i, D - ii

A - ii, B - i, C - iv, D - iii

A - iii, B - ii, C - iv, D - i

A - ii, B - iv, C - i, D - iii

Solution

Question 8

Aldosterone

ADH

ACTH

None of these

Solution

Question 9

crushing food

slowing down the passage of food

increasing the absorptive area

extra secretion of digestive enzymes

Solution

Question 10

The activity of ethylene decreases.

Auxiliary buds get sensitised to gibberellin.

Auxiliary buds get sensitised to cytokinin.

The activity of abscisic acid decreases.

Solution

Question 11

2,4-D

IAA

GA

Zeatin

Solution

Question 12

glutamic acid is substituted by valine

valine is substituted by glutamic acid

glutamic acid is substituted by leucine

leucine is substituted by glutamic acid

Solution

CO₂ and ammonia

CO₂ and urea

FADH₂