Hint and solutions of Online MCQ Quiz -01

Hints and solutions of Online MCQ Quiz - 01

---

1) Connecting link between amphibia and reptilia is:
a. Seymouria✔
b. Neopilina
c. Chimaera
d. Ornithorhyncus

Neopilina = Connecting link between annelida and mollusca
Chimaera = Connecting link between cartilaginous and bony fish
Ornithorhyncus = Connecting link between reptiles and mammals

For more detail about connecting links, missing links and living fossils, click here.

---

2) Which of the following is false fish?
a. Cuttle fish✔
b. Dog fish
c. Flying fish
d. Sucker fish

False fishes = Jelly fish, Devil fish, Silver fish, Razor fish, Hag fish, Cuttle fish, Shell fish, Star fish.

For its mnemonics, click here.

---

3) Reissenr's membrane lies between:
a. Scala vestibuli and Scala tympani
b. Scala vestibuli and Scala media✔
c. Scala tympani and Scala media
d. Scala media and organ of corti

Basilar membrane is present in between scala tympani and scala media.
Tectoral membrane is present above organ of corti.

---

4) Erythropoietin is secrated by:
a. Liver
b. Pancreas
c. Spleen
d. Kidney ✔

Kidney secrates three major hormones: @RED
R = Renin
E = Erytheopoietin
D = Vitamin D

---

5) Digital formula of hind limb of rabbit is:
a. 2,3,3,3,3
b. 0,3,3,3,3✔
c. 0,2,2,3,3
d. 2,2,3,4,3

Digital formula of forelimb of rabbit = 2,3,3,3,3
Digital formula of forelimb of frog = 0,2,2,3,3
Digital formula of hindlimb of frog = 2,2,3,4,3

6) Root tip cells are rich in:
a. Endoplasmic rericulum
b. Mitochondria
c. Golgi bodies✔
d. Centrioles

Cells of root cap contain abundant golgi bodies which secrate mucilage to lubricate soil particles.

7) Which anticodon is present in corresponding t-RNA, if m-RNA has UGA code?
a. ACT
b. TCU
c. AUC
d. None ✔

Since, UGA is non-sense codon, so it does not have any anticodon.
Non-sense codons:- UAG (Amber), UAA (Ochre), UGA (Opal)

8) Laminarion oil is the reserve material of:
a. Brown algae✔
b. Red algae
c. Green algae
d. Blue green algae

Floridian starch = Red algae(Rhodophyceae)
Laminarion oil or mannital oil = Brown algae(Pheophyceae)
Starch = Green algae(chlorophyceae)

9) Cleistogamous flower is present in:
a. Arachis hypogea✔
b. Cassia fistula
c. Nelumbo nucifera
d. Zea mays

Flower that does not open even after maturation is called cleistogamous flower. Plant like Arachis hypogea (ground nut) has flower inside soil surface. Only self fertilization takes place in them and fruit development occurs within its nut.

10) Which of the following monocot shows secondary growth?
a. Sugarcane
b. Orchid
c. Yam
d. Agave ✔

Monocots showing secondary growth = @DAY
D = Dracena
A = Agave
Y = Yucca

11) Most of the primary aquatic animals excrete:
a. Urea
b. Ammonia✔
c. Uric acid
d. Amino acid

Ammonia is highly toxic among other excretes, so it requires large amount of water to expel. Thus for adoptation, most of the ammonotelic animals are primary aquatic animals.

Urea = It is less toxic than ammonia and can remains in body for some time.
Amino acid = These are the direct end product of protein digestion. It is excreted by some mollusca and some echinodermata.
Uric acid = It is dry and arid form of excrete. It helps to conserve water in the body. It is excreted mostly by birds, insects and land reptiles.

12) Which type of vision is present in cockroach?
a. Binocular vision
b. Mosaic vision✔
c. Blur vision
d. Monochromatic vision

Cockroach have mosaic vision due to compound eyes.
Visual unit of compound eye is ommatidium.

13) Single occipital condyle is present in:
a. Human
b. Frog
c. Salamander
d. Pigeon✔

◾Reptilia and aves have only one occipityl condyle in its skull, so it is called as monocondylic.
◾Amphibia and mammalia have two occipital condyle in its skull, so it is called as dicondylic.

NOTE= For instant remember:
Those animals which can rotate their head easily are monocondylic and those animals which can't rotate are dicondylic.

14) Which of the following has highest velocity of impulse conduction?
a. S.A. node
b. A.V. node
c. Bundle of His
d. Purkinje Fibres✔

Velocity of impulse conduction:
SA node < AV node < Bundle of His < Purkinje fibres
Rate of impulse generation:
SA node > AV node > Bundle of His > Purkinje fibres

15) Spleen is derived from:
a. Ectoderm
b. Mesoderm✔
c. Endoderm
d. Mesoderm and Endoderm

For mnemonics of all the major organs and their origin; click here.

16) Triticum aestivum is:
a. Diploid
b. Triploid
c. Tetraploid
d. Hexaploid✔

Triticum durum is tetraploid wheat and are commonly used to make pasta.

17) Which of the following category is not present in 4 kingdom system of classification?
a. Monera
b. Mycota✔
c. Protista
d. Plantae

2 kingdom system = Plantae, Animalia
3 kingdom system = Protista, Plantae, Animalia
4 kingdom system = Monera, Protista, Plantae, Animalia
5 kingdom system = Monera, Mycota, Protista, Plantae, Animalia

18) Which of the following is false moss?
a. Fox moss✔
b. Bogg moss
c. Copper moss
d. haircap moss

Fox moss is a lichen.
For mnemonic of true moss, click here.

19) Trapdoor mechanism of pollination is present in:
a. Ficus sps.✔
b. Calotropis
c. Salvia
d. Yucca

Calotropis = translator mechanism
Salvia = lever mechanism/turn pipe mechanism
Yucca = Obligate symbiotic relation mechanism

20) Which hormone increases the number of female flowers in cucurbit?
a. Auxin
b. Cytokinin
c. Gibberellin
d. Ethylene✔

Gibberlin produces male flowers in place of female flower in cucurbits. It is antagonistic to ethylene.

21) Plasmodium malariae causes:
a. Benign tertian malaria
b. Malignant tertian malaria
c. Benign sub-tertian malaria
d. Benign quartan malaria✔

Benign tertian malaria = P. vivax
Malignant tertian malaria = P. falciparum
Benign sub-tertian malaria = P. ovale

For its mnemonics, click here.

22) In earthworm, a pair of male genital pores is present in:
a. 18th segment✔
b. 19th segment
c. 20th segment
d. 17/18th segment

Body Parts and Structures	Located Segments
Digestive system
Prostomium	Attached with 1st segment
Mouth (peristomium)	1st segment
Buccal cavity	2nd -3rd segment
Pharynx	3rd-4th segment
Oesophagus	5th-7th segment
Gizzard	8th-9th segment
Stomach	9th-14th segment
Intestine	15th-last segment
Anus	Last segment (pygidium)
Pre-typhlosolar region	15th to 25th segments
Typhlosole	26th to last except last 23rd or 25th segments
post-typhlosolar region (rectum)	last 23rd or 25th segment to last
Reproductive System
Clitellum	14th, 15th and 16th segments
Male organs
Testis(2pairs)	10th and 11th segments
Testis sacs (1pairs)	10th and 11th segments
Spermiducal funnels (2pairs)	10th and 11th segments
Semimal vesicles (2pairs)	11th and 12th segments
Vasa deferentia (2pairs)	10/11th to 18th segments
Prostate gland (1pairs)	16/17th to 20/21st segments
Accessory gland (2pairs)	17th and 19th segments
Common prostatic gland (1pairs)	18th segment
Male genital pores (1pairs)	18th segment
Genital papillae (2pairs)	17th and 19th segments
Female organs
Ovaries (1pair)	13th segment
Oviducal funnels (1pair)	13th segment
Oviducts (1pair)	13th and 14th segments
Female genital aperture (single)	14th segment
Spermathecal pores (4pairs)	5/6, 6/7, 7/8, 8/9 segments
Spermathecae (4pairs)	6th, 7th, 8th, 9th segments
Circulatory System
Lateral hearts (2pairs)	7th and and 9th segments (1pair in each segment)
Lateral oesophageal hearts (2pairs)	12th and 13th segments (1pair in each segment)
Dorsal blood vessel	1st to 13th segments (distributive)
	14th to last segments (Collecting)
Subneural vessel	14th to last segments
Supraoesophageal vessel	9th to 13th segments
Anterior loop (2pairs)	10th and 11th segments (1pair in each segment)
Blood glands	4th, 5th and 6th segments
Lymph glands	26th to last segments (1pair in each segment)
Excretory System
Septal nephridia	15th to 2nd last segments
Integumentary nephridia	7th to 2nd last segments
Pharyngeal nephridia	4th, 5th and 6th segments
Nervous System
Nerve ring	3rd and 4th segments
Nerve cord	5th to last segments

23) Which of the following is present in frog but absent in human?
a. Salivary gland
b. Jejunum
c. Interventricular septum
d. Renal portal system✔

In human, only hepatic portal system is present. But in frog, both hepatic and renal portal system is present.

24) Semi-essential amino acid is:
a. Isoleucine
b. Arginine✔
c. Proline
d. Aspartic acid

Histidine and arginine are semi-essential amino acids.

25) Macrophage present in skin is:
a. Dust cells
b. Microglia
c. Langerhan's cells✔
d. Mesangial cells

List of macrophages
Blood = Monocytes
CNS = Microglia
Lungs = Dust cells
Liver = Kupfer cells
Lymph nodes and spleen = Histocytes
Skin = Langerhan's cells
Kidney = Mesangial cells
Bone = Osteoclast

For mnemonics of all the tissues and their macrophages, click here.

26) Correct sequence of cell cycle is:
a. S, G1, G2, M
b. G1, S, G2, M✔
c. M, G1, G1, S
d. G2, S, M, G1

G1, S and G2 belongs to interphase and is longest and resting phase.
M is dividing and shortest phase. It contains four sub-phases. They are Prophase, Metaphase, Anaphase and Telophase.

27) Patau syndrome is seen in an individual due to:
a. Trisomy of 13th chromosome✔
b. Trisomy of 18th chromosome
c. Monosomy of sex chromosome (X+0)
d. Trisomy of sex chromosome (XXY)

Sex Chromosome Defects:-
Turner's syndrome = Monosomy (X+0) (44+X)
Klinefelter's syndrome = Trisomy (XXY)(44+XXY)
Super female = Trisomy = (44+XXX)

Somatic Chromosome Defects:-
Patau's Syndrome = trisomy of 13th chromosome
Edward's Syndrome = trisomy of 18th chromosome
Down's Syndrome = trisomy of 21st chromosome

28) Maximum absorption of water takes place from:
a. Meristematic region
b. Zone of cell elongation
c. Zone of cell maturation✔
d. Root cap

Zone of cell maturation have most of the roots and root hairs, so maximum absorption of water takes place through this part.

29) Vegetative reproduction in Agave takes place by:
a. Stolon
b. Offset✔
c. Runner
d. Sucker

Vegetative reproduction through offset is common in hydrophytes like Eichornia, Pistia, etc. But Agave is the terrestrial plant that also reproduce through offset.

30) Axile placentation of ovary with monothecous anther is present in:
a. Solanaceae
b. Malvaceae✔
c. Liliaceae
d. Asteraceae

Axile placentation of overy = @SoMaLiA
Solanaceae, Malvaceae, Liliaceae ➡ Axile
Basal placentation of overy = @BAG
Basal➡Astaraceae, Graminae
Parietal placentation of overy = @PCB
Parietal ➡ Cucurbetaceae, Brassicaceae
Marginal placentation of overy = @MaLe
Marginal = Leguminaceae

Anther is monothecous and bisporongiate in Malvaceae family.

31) Hydra can't digest:
a. Starch✔
b. Protein
c. Fat
d. Lipid

Hydra is carnivorous and the digestion is first extracellular followed by intracellular. Hydra can digest all type of food except starch.

32) Which system is most developed in parasites?
a. digestive system
b. sensory system
c. excretory system
d. reproductive system✔

Locomotory, digestive and sense organs are usually lost or reduced in parasites.

33) Excessive stretching of tendon causes:
a. Strain✔
b. Sprain
c. mockrain
d. migraine

Excessive stretching of ligament = Sprain.
@t = t ➡ tendon = strain

Bone to Muscle is connected by Tendon.
Bone to Bone is connected by Ligament.
@BoMTe - BoBLi

34) Tusks of elephant are:
a. Incisors✔
b. Canines
c. Premolars
d. Molars

In elephants, two incisors of upper jaw grow throughout life and become long and thick tusks.

35) Fertilization of ovum in mammals takes place in:
a. Ovary
b. Uterus
c. Fallopian tube✔
d. Vagina

36) A piece of RNA without capsid is called as:
a. Virion
b. Virusoid
c. Viroid✔
d. Prion

Virion = A fully assembled virus capable of causing infection.
Virusoid = Circular single stranded RNA(s) dependent on virus for replication and encapsidation.
Prion = Piece of misfolded protein without nucleic acid and is infectious in nature.

37) Bacteria containing tuft of flagella at one end is called as:
a. Amphitrichous
b. Cephalotrichous✔
c. Lophotrichous
d. Peritrichous

38) Botanical snake of plant kingdom is:
a. Gymnosperm
b. Pteridophytes✔
c. Bryophytes
d. Thalophytes

Amphibian of plant kingdom = Bryophyta

39) Which compound will be formed in kreb cycle from succinic acid in the presence of succinate dehydrogenase?
a. Malic acid
b. Succinyl Co-A
c. Fumaric acid✔
d. α - ketoglutaric acid

For mnemonics of Kreb cycle: click here.

40) High root to shoot ratio is common in:
a. Hydrophytes
b. Mesophytes
c. Epiphytes
d. Xerophytes✔

For absorption of water from large area and deep layers, roots of xerophytes have to spread highly. This adoptive feature makes the high root to shoot ratio in xerophytes.
Lowest root to shoot ratio is present in hydrophytes.

41) Oil of chenopodium (बेथेको तेल) is used in:
a. typhoid
b. malaria
c. ascariasis✔
d. taeniasis

Oil of Chenopodium, Antipar, Alcopar, Tetrachloro ethylene etc. are used to treat ascariasis.

42) Node of Ranvier is present in:
a. Axon✔
b. Dendrites
c. Cyton
d. Nephrone

Cyton is central cell body of neuron.
Axon is long process from cyton having uniform thickness and is branched only at terminal.
Dendrites is short process from cyton having branches near their base.

43) Occulomoter nerve is:
a. Sensory nerve
b. Motor nerve✔
c. both
d. None

For its mnemonics, click here.

44) Which of the following is not absorbed in Proximal Convoluted Tube?
a. Glucose
b. Amino acid
c. Lactic acid
d. Fatty acid✔

In PCT of nephrone; Glucose, Lactic acid, Amino acids, Vitamins, water and other nutrients are absorbed except fatty acids.
For its mnemonics; click here.

45) Most successful type of kidney transplant is:
a. Autograft
b. Isograft✔
c. Allograft
d. Xenograft

Order of success of graft transplant is:
Autograft Isograft Allograft Xenograft

In case of kidney transplant, autograft is not possible. So isograft is said as most successful transplant.

46) Which of the following character of pea plant is not included in Mendel cross experiment?
a. Shape of pod
b. Position of flower
c. Shape of seed
d. Seed number in pod✔

List of characters of pea included by mendel in his cross:
▶ Shape of seed
▶ Colour of seed
▶ Position of flower
▶ Height of plant
▶ Shape of pod
▶ Colour of pod
▶ Colour of flower

47) Holotism relationship is present in:
a. Fungi
b. Algae
c. Bacteria
d. Lichen✔

Holotism relation is like the relationship between master and slave. In case of lichen, fungi acts as master and algae acts as slave.

48) Inulin (a water soluble polysaccharide) is present in the root of:
a. Potato
b. Ginger
c. Dahlia✔
d. Chrysanthemum

49) Which of the following is plantless root?
a. Wolffia
b. Cuscuta
c. Utricularia
d. Monotrapa✔

For mnemonics of plantless root and rootless plant, click here.

50) What happens if pure water is used in saline bottle instead of saline water and injected to blood?
a. RBC will brust due to endosmosis.✔
b. RBC will constrict due to exosmosis.
c. Blood will coagulate due to water pressure.
d. Nothing will happen.

In saline water bottle, 0.9% concentration of salt water is present which is isotonic with blood.
If the blood is mixed with pure water, the RBCs increase in volume and brust. This is called as haemolysis. The remaining part of RBC is called as ghost cells.