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Mix Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following are the locomotory organelles in Amoeba?

A
Setae

B
Cilia

C
Flagella

D
Pseudopodia

Solution

All except setae are locomotory organs in protozoa.
Amoeba locomote by projecting false feet called pseudopodia.
Cilia is locomotory organ in Paramecium.
Flagella are locomotory organs in Euglena.
Question 2
1 / -0

The formation of embryo directly from nucellus and integument is called

A
adventive polyembryony

B
apospory

C
apogamy

D
apomixis

Solution

An embryo develops directly from a diploid cell other than egg like that of nucellus and integument, e.g. citrus and opuntia. It gives rise to a condition called polyembryony or the phenomenon of having more than one embryo.

Question 3

1 / -0

Match List I (annelids) with List II (their examples):

List I	List II
I. Polychaeta	A. Nereis
II. Hirudinea	B. Acanthobdella
III. Archiannelida	C. Polygordius
IV. Oligochaeta	D. Pheretima

I – B, II – A, III – C, IV – D

I – A, II – B, III – D, IV – C

I – A, II – B, III – C, IV – D

I – B, II – A, III – D, IV – C

Solution

List I	List II
I. Polychaeta	A. Nereis
II. Hirudinea	B. Acanthobdella
III. Archiannelida	C. Polygordius
IV. Oligochaeta	D. Pheretima

Nereis is a genus of polychaete worms in the family Nereididae.
Acanthobdella peledina is a species of leech in the infraclass Acanthobdellidea (Class: Hirudinea).
Polygordius is a primitive Archiannelid or living fossil.
The Pheretima posthuma is known as earthworm. It is found in the wet soil which is rich in organic matter. It belongs to class Oligochaeta.

Question 4
1 / -0

What is the reflex caused by moderate compression of testicles called?

A
Kocher's reflex

B
Babinski's reflex

C
Red reflex

D
Myenteric reflex

Solution

Kocher's reflex is the contraction of the abdominal muscles following moderate compression of the testicle.
Babinski's reflex occurs after the sole of the foot has been firmly stroked. The big toe then moves upward or towards the top surface of the foot. The other toes fan out.
The red reflex refers to the reddish-orange reflection of light from the back of the eye, or fundus, observed when using an ophthalmoscope or retinoscope.
Myenteric reflex is a reflex that is responsible for the wave of peristalsis moving along the intestine and that involves contraction of the digestive tube above and relaxation below the place where it is stimulated by an accumulated mass of food.
Question 5
1 / -0

Consider the following statements:
(a) The causal agent of syphilis is Treponema pallidum.
(b) Tetanus is caused by a virus called Clostridium tetani.
(c) The mode of transmission of cholera is contaminated water, food and drinks.
(d) The symptoms of tuberculosis are acute diarrhoea, vomiting, dehydration, etc.

Which of the given statements are correct?

A
(a) and (d)

B
(c) and (d)

C
(a) and (b)

D
(a) and (c)

Solution

Correct Answer: (a) and (c)Clostridium tetani is a rod-shaped, anaerobic species of pathogenic bacteria. It is not a virus. The symptoms of TB include a cough (sometimes blood-tinged), weight loss, night sweats and fever.
Question 6
1 / -0

Nephridia of earthworm is analogous to

A
nematoblast of hydra

B
tracheae of insects

C
flame cell of planaria

D
gill of prawn

Solution

Nephridia of earthworm is analogous to flame cell of planaria as both of them are meant for excretion.They are more evolved than the flame cells in that they have a system for tubular reabsorption by a capillary network before excretion.

Question 7

1 / -0

Match column I with column II.

Column I	Column II
A. Azidothymidine	i. Psoriasis
B. Bactrim	ii. Acne
C. Cortisone	iii. Bronchitis
D. Accutane	iv. AIDS/HIV

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

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

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

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

Solution

Azidothymidine is an antiretroviral medication used to prevent and treat HIV/AIDS. It is generally recommended for use with other antiretrovirals. It may be used to prevent mother-to-child spread during birth or after a needlestick injury or other potential exposure.
Bactrim is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections (such as middle ear, urine, respiratory, and intestinal infections). It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type).
Topical steroids are the most frequently used treatments for psoriasis. A common treatment for psoriasis is corticone cream.
Accutane is an effective medication for treating acne. It is also used to prevent certain skin cancers.

Question 8
1 / -0

Restriction endonucleases are the enzymes which

A
recognise a specific nueleotide sequence for binding of DNA ligase

B
restrict the action of the enyme DNA polymerase

C
remove nucleotides from the ends of the DNA molecule

D
make cuts at specific positions within the DNA molecule

Solution

Restriction endonucleases are enzymes that recognise a specific DNA sequence, called a restriction site, and cleave the DNA within or adjacent to that site. Few examples of restriction endonucleases and the sequences cut by the respective enzymes are shown below:
Question 9
1 / -0

Which of the following plants is completely devoid of roots?

A
Ceratophyllum

B
Hydrilla

C
Vallisneria

D
Azolla

Solution

Ceratophyllum is completely devoid of roots because it is a hydrophyte and this is the adaptation to environment.
Question 10
1 / -0

Cleavage in a mammalian egg is

A
superficial meroblastic

B
discoidal meroblastic

C
unequal holoblastic

D
equal holoblastic

Solution

Cleavage may be total (holoblastic) or partial (meroblastic). In eggs with no yolk or only a moderate amount of yolk, cytokinesis completely divides the cell and cleavage is holoblastic. Here, cleavage furrows are formed all the way through the zygote. An equal holoblastic cleavage producing blastomeres of equal size.This form of cleavage occurs in mammals such as humans.
Question 11
1 / -0

Which of the following represents an ovule where the embryo sac becomes horseshoe-shaped and the funiculus and micropyle are close to each other?

A
Amphitropous

B
Antropous

C
Circinotropous

D
Atropous

Solution

In amphitropous ovule, the embryo sac becomes horseshoe-shaped and the funiculus and micropyle are close to each other.
Question 12
1 / -0

Which of the following structures will not be visible in the section of a hyaline cartilage?

A
Perichondrium

B
Chondroblast

C
Lacuna

D
Haversian canal

Solution

Haversian canals are a series of microscopic channels in the outermost region of bone called cortical bone that allow blood vessels and nerves to travel through them. Each haversian canal generally contains one or two capillaries and nerve fibres.
Question 13
1 / -0

The longitudinal muscular folds formed by the inner walls of stomach are called

A
papillae of vatu

B
rugae

C
villi

D
gyri

Solution

The longitudinal muscular folds formed by the inner walls of stomach are called rugae.
Question 14
1 / -0

Which of the following vertebrae of frogs has a convex anterior surface?

A
Atlas

B
Urostyle

C
8^th vertebra

D
9^th vertebra

Solution

The centrum of 9^th vertebra (sacral vertebra) of frog is acoleus (convex at both ends).

Question 15

1 / -0

Match the items of column I with the items of column II.

Column I	Column II
i. X-ray	a. Bloch and Purcell
ii. EEG	b. Chardack
iii. NMR	c. P. K. Sethi
iv. Pacemaker	d. Wilhelm Roentgen
v. Jaipur foot	e. Hans Berger

i – e, ii – a, iii – b, iv – c, v – d

i – d, ii – e, iii – a, iv – b, v – c

i – d, ii – c, iii – b, iv – a, v – c

i – e, ii – c, iii – d, iv – a, v – c

Solution

X-rays were discovered in 1895 by Wilhelm Conrad Roentgen, while experimenting with a cathode radiation.
Hans Berger is best known as the inventor of electroencephalography (EEG) (a method for recording "brain waves") in 1924. He is also known as the discoverer of the alpha wave rhythm, also known as the "Berger wave".
Nuclear magnetic resonance (NMR) is a method of physical observation in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field. In 1946, Felix Bloch and Edward Mills Purcell expanded the technique for use on liquids and solids, for which they shared the Nobel Prize in Physics in 1952.
William M. Chardack was the pioneer in the development of the implantable cardiac pacemaker.
The Jaipur Foot, also known as the Jaipur Leg, is a rubber-based prosthetic leg for people with below-knee amputations. The idea of the Jaipur Foot was conceived by Ram Chander Sharma under the guidance of Dr. P.K. Sethi.

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Mix Test - 3

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Mix Test - 3

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SHARING IS CARING

Question 1

Setae

Cilia

Flagella

Pseudopodia

Solution

Question 2

adventive polyembryony

apospory

apogamy

apomixis

Solution

Question 3

I – B, II – A, III – C, IV – D

I – A, II – B, III – D, IV – C

I – A, II – B, III – C, IV – D

I – B, II – A, III – D, IV – C

Solution

Question 4

Kocher's reflex

Babinski's reflex

Red reflex

Myenteric reflex

Solution

Question 5

(a) and (d)

(c) and (d)

(a) and (b)

(a) and (c)

Solution

Question 6

nematoblast of hydra

tracheae of insects

flame cell of planaria

gill of prawn

Solution

Question 7

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

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

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

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

Solution

Question 8

recognise a specific nueleotide sequence for binding of DNA ligase

restrict the action of the enyme DNA polymerase

remove nucleotides from the ends of the DNA molecule

make cuts at specific positions within the DNA molecule

Solution

Question 9

Ceratophyllum

Hydrilla

Vallisneria

Azolla

Solution

Question 10

superficial meroblastic

discoidal meroblastic

unequal holoblastic

equal holoblastic

Solution

Question 11

Amphitropous

Antropous

Circinotropous

Atropous

Solution

Question 12

Perichondrium

Chondroblast

Lacuna

Haversian canal

Solution

8^th vertebra

9^th vertebra