R4RIN – MCQs, Mock Tests | Biology Biology MCQS[NEET-2021 to 2022]-Biology MCQS 2021

Spinal nerves are

1. 32 pairs
2. 31 pairs
3. 33 pairs
4. 34 pairs

✅ Correct Answer: 2

3rd and 9th cranial nerve is

1. Optic and trigeminal
2. Trochlear and vagus
3. Oculomotor and glossopharyngeal
4. None of the above

✅ Correct Answer: 3

Sacral nerves are the types of:

1. Spinal nerves
2. Cranial nerves
3. Both A&B
4. None of the above

✅ Correct Answer: 1

Situation of cervical plexus...

1. Each side of the neck alongside the first four cervical vertebrae
2. Left side of the neck alongside the first three cervical vertebrae
3. Right side of neck alongside the first four cervical vertebrae
4. Left side of neck alongside the first five vertebrae

✅ Correct Answer: 1

Trigeminal is a

1. 2nd spinal nerve
2. 4th spinal nerve
3. 4th cranial nerve
4. 5th cranial nerve

✅ Correct Answer: 4

Limbic system controls

1. Food habits
2. Emotional behaviour
3. Retention of recent memory
4. All of the above

✅ Correct Answer: 4

Structural classification of neurons

1. Multipolar, bipolar, unipolar
2. Sensory and motor neurons
3. Inter neurons
4. Bipolar and unipolar neurons

✅ Correct Answer: 1

Afferent neuron are-

1. Sensory neuron
2. Motor neuron
3. Inter neuron
4. Bipolar neuron

✅ Correct Answer: 1

P.N.S is madeup of:

1. Cranial and spinal nerves
2. Spinal cord
3. Brain
4. All of the above

✅ Correct Answer: 1

Medulla develop from the

1. Myelencephalon
2. Diencephalon
3. Mesencephalon
4. None of the above

✅ Correct Answer: 1

Duramater is a covering of

1. Heart
2. Brain
3. Lungs
4. None of the above

✅ Correct Answer: 2

The piamater is

1. Outer layer
2. Middle layer
3. Inner layer
4. None of the above

✅ Correct Answer: 3

The brain is madeup of about

1. 10 billion neurons
2. 100 millions neurons
3. 100 billions neurons
4. 10 million neurons

✅ Correct Answer: 3

Formation of CSF-

1. 100ml/hour
2. 200ml/hour
3. 300ml/hour
4. 400ml/hour

✅ Correct Answer: 2

Liver is the.

1. Largest gland
2. Vital organ
3. Organ where maximum heat is produced
4. All of the above

✅ Correct Answer: 4

Function of gall bladder

1. Storage of bile
2. Alteration of pH of bile
3. Secretion of bile
4. A and B are correct

✅ Correct Answer: 4

Function of bile..

1. Absorptive function
2. Antiseptic function
3. Digestion function
4. All of the above

✅ Correct Answer: 4

DOPAMINE..

1. Decrease in heart rate via beta receptor
2. Is secreted by adrenal medulla
3. Decreased in systolic blood pressure
4. All of the above

✅ Correct Answer: 2

Action of adrenaline

1. Increased systolic blood pressure
2. Decrease the secreation of sweat
3. Decreased in red blood cell count in blood
4. Decreased activity of brain

✅ Correct Answer: 1

The changes which occur in vagina during pregnancy are:

1. The pH in vagina become more than 3.5
2. Deposition of glycogen decreased in the epithelial cells
3. Violet colouration occur due to increased blood supply
4. All of the above

✅ Correct Answer: 3

How many types of cells are present in the blood

1. Three types
2. Two types
3. Four types
4. One types

✅ Correct Answer: 1

The specific gravity of blood :

1. 1.052 to 1.061
2. 1.092 to 1.101
3. 1.022 to 1.026
4. None of the above

✅ Correct Answer: 2

Function of blood

1. Storage function
2. Excretory function
3. Regulation of water balance
4. All of the above

✅ Correct Answer: 4

The correct statement is

1. The red blood cells increases slightly after sleep
2. There is a slightly decreased in the red blood cell count after meals.
3. The increased in the atmospheric temperature increases red blood cell count
4. All of the above

✅ Correct Answer: 3

The abnormal increase in red blood cell is called

1. Anaemia
2. Polycythemia
3. Leucopenia
4. Leukopoiesis

✅ Correct Answer: 2

Vitamin B12 is called

1. Cynocobalamin
2. Antipernicious factor
3. Extrinsic factor
4. A and B are correct

✅ Correct Answer: 4

Factor necessary for haemoglobin

1. Copper, vitaminC
2. Cobalt and nickel
3. VitaminC
4. All of the above

✅ Correct Answer: 4

7th and 1st cranial nerves are..

1. Facial and olfactory
2. Optic and olfactory
3. Auditory and olfactory
4. Aaccessory and olfactory

✅ Correct Answer: 1

Cerebellum is develop from the..

1. Myelencephalon
2. Metencepahlon
3. Telenchepalon
4. Mesencephalon

✅ Correct Answer: 2

Hypocapnea is

1. Decrease carbon di oxide content in blood
2. Increase carbon dioxide content in blood
3. Decrease oxygen content in blood
4. Increase oxygen content in blood

✅ Correct Answer: 1

Weight of cerebellum is:

1. 120gm
2. 200gm
3. 150gm
4. 220gm

✅ Correct Answer: 3

Thoracic nerves are:

1. 1 pairs
2. 12 pairs
3. 5 pairs
4. 8 pairs

✅ Correct Answer: 2

The diameter of ribosomes are

1. 17 nm
2. 15nm
3. 12nm
4. 18nm

✅ Correct Answer: 2

Functions of cell membrane

1. The cell membrane permits only some selective substances to pass through it
2. Excretory function
3. Oxygen enters the cell from the cell through cell membrane
4. All of the above

✅ Correct Answer: 4

Composition of cell membrane

1. Protein(55%),lipids(20%),carbohydrates(25%)
2. Protein (55%) , lipids (40), carbohydrates (5%)
3. Protein(40%), lipids(55%),carbohydrates (5)%
4. Protien(40%), lipids (43%), carbohydrates (17%)

✅ Correct Answer: 2

Motor nerves are

1. 3rd-4th-6th
2. 1st-2nd-3rd
3. 1st-2nd-8th
4. 5th-9th-10th

✅ Correct Answer: 1

Functions of olfactory

1. Vision
2. Turn eye ball
3. Smell
4. Muscle sense

✅ Correct Answer: 3

Applied aspect of olfactory

1. Anosmia-loss of sense of smell
2. Anopsia-loss of the vision
3. Diplopia- double vision
4. Loss of sensation of touch

✅ Correct Answer: 1

Function of vagus nerve

1. Hearing
2. Movement of tongue during speech
3. Muscle sense
4. Smooth muscle contraction and relaxation

✅ Correct Answer: 4

Types of acquired immunity

1. Cellular and humoral immunity
2. Innate and cellular immunity
3. Humoral and innate immunity
4. None of the above

✅ Correct Answer: 1

Which is not a type of antibodies

1. IgA
2. IgD
3. IgF
4. IgM

✅ Correct Answer: 3

The ninth clotting factor

1. Hegman factor
2. Christmas factor
3. Stuart factor
4. Stable factor

✅ Correct Answer: 2

The 7th clotting factor is

1. Stable factor
2. Hegman factor
3. Christmas factor
4. Stuart factor

✅ Correct Answer: 1

The function of abducent is

1. Vision
2. Smell
3. Eyeball movement
4. Secretion of saliva

✅ Correct Answer: 3

Pleura is

1. Largest serous membrane of the body,lining in the abdominal cavity
2. Serous membrane which is lined by mesothelium
3. Situated in closed sac which is invaginated by a number of viscera
4. Both B and C are correct.

✅ Correct Answer: 2

Urinary system includes a pair of

1. Kidney, ureters, urinary bladder, urethra
2. Kidney, ureters, urinary bladder , spleen and urethra
3. Urinary bladder, spleen, urethra
4. All of the above

✅ Correct Answer: 1

Specific gravity of bile

1. 1050 to 1080
2. 1010 to 1011
3. 1100 to 1110
4. 1010 to 1080

✅ Correct Answer: 2

Normal pH of bile

1. 08-8.6
2. 10-Sep
3. 1-0.5
4. 4-Feb

✅ Correct Answer: 1

Urinometer is used for the analysis of _____ in urine.

1. Albumin
2. Specific gravity
3. Urea
4. Volume

✅ Correct Answer: 2

The weight of kidney in males

1. 125gm
2. 170 gm
3. 150gm
4. 135gm

✅ Correct Answer: 3

Lateral border of kidney is

1. Flat
2. Convex
3. Concave
4. None of the above

✅ Correct Answer: 2

Blood supply of kidney

1. Renal arteries
2. Coronary artery
3. Carotid artery
4. Facial artery

✅ Correct Answer: 1

Situation of urinary bladder in males

1. Is is anterior to the vagina and inferior to the uterus
2. It is directly anterior to the rectum
3. Epigastrium
4. None.

✅ Correct Answer: 2

Aplasia is --

1. The kidney may be under development
2. The kidney may be over development
3. Incomplete development of a kidney tissue
4. The two kidney may form one mass lying in the midline.

✅ Correct Answer: 3

Which is not a accessory digestive organ

1. Teeth
2. Liver
3. Pancreas
4. Spleen

✅ Correct Answer: 4

Which one of the following types organisms occupy more than one trophic level in a ecosystem

1. Frog
2. Fish
3. Zooplankton
4. None.

✅ Correct Answer: 2

Renewable exhaustible natural resource of energy is

1. Biomass/forest
2. Coal
3. Petroleum
4. Kerosene

✅ Correct Answer: 1

Segregation of mendelian factors (Aa) occurs during

1. Zygotene
2. Diplotene
3. Anaphase I
4. Anaphase II

✅ Correct Answer: 3

Chromosomes are visible with chromatid in phase

1. Prophase
2. Metaphase
3. Interphase
4. Anaphase

✅ Correct Answer: 2

Crossing over requires an enzyme

1. Ligase
2. Polymerase
3. Endonuclease
4. None of the above

✅ Correct Answer: 4

Cytokinesis is

1. Division of nucleus
2. Divisions of chromosomes
3. Division of cytoplasm
4. None of the above

✅ Correct Answer: 3

Omnis cellula e cellula is generalisation given by

1. Lamarck
2. Dutrochet
3. Virchow
4. Leeuwenhoek

✅ Correct Answer: 3

All plastids have similar structure because they can

1. Store starch lipids and proteins
2. Perform same function
3. Be present together
4. Get transformed from one type to another

✅ Correct Answer: 4

Water protects organism from thermal shock due to its high

1. Thermal conductivity
2. Dielectric constant
3. Latent heat
4. All of the above

✅ Correct Answer: 3

Which organelle is present only in plants

1. Lysosome
2. Peroxisome
3. Glyoxysome
4. Ribosome

✅ Correct Answer: 3

Folding of inner mitochondrial membrane are called

1. Thylakoids
2. Grana
3. Cristae
4. None of the abov

✅ Correct Answer: 3

On hydrolysis, nucleoside does not yield

1. Phosphoric acid
2. Pentose sugar
3. Pyramidine
4. Purines

✅ Correct Answer: 1

Read the following statements: (i) The polysaccharides made up of glucose monomers are cellulose, glycogen and starch. (ii) Fructose is the sweetest natural sugar. (iii) Glycine is the simplest ami

1. Five
2. Four
3. Three
4. Two

✅ Correct Answer: 1

The hormone adrenaline is formed from __________ amino acids

1. Glycine
2. Alanine
3. Tryptophan
4. Tryosine

✅ Correct Answer: 4

Choose the correct statement

1. All proteins have 20 amino acids
2. Both ends of protein are similiar
3. Proteins are formed by peptide bonds
4. All proteins are soluble

✅ Correct Answer: 3

Which of the following element is present in very less quantity in the body

1. Ca
2. Mg
3. K
4. Cu

✅ Correct Answer: 4

Maximum amount 70 -75% of carbon dioxide transport occurs as

1. Bicarbonate
2. Dissolved in plasma
3. Carbaminohaemoglobin complex
4. None of the above

✅ Correct Answer: 1

In which of the following in which the iron in the heme group is in the Fe 3+ (ferric) state?

1. Oxyhaemoglobin
2. Methaemoglobin
3. Carbaminohaemoglobin
4. Haemoglobin without oxygen

✅ Correct Answer: 2

Total oxygen that can be carried by blood in

1. 1000-1200ml
2. 2000-3000ml
3. 130-200ml
4. 75-100ml

✅ Correct Answer: 1

Book lungs are respiratory structures of

1. Mollusca
2. Mammals
3. Earthworms
4. None of the above

✅ Correct Answer: 4

Arytenoid cartilage occurs in

1. Larynx
2. Nose
3. Hyoid
4. Sternum

✅ Correct Answer: 1

Where is protein digestion accomplished

1. Stomach
2. Rectum
3. Duodenum
4. Ileum

✅ Correct Answer: 4

Release of pancreatic juice on detection of fat and protein is stimulated by

1. Enterokinase
2. Cholecystokinin
3. Secretin
4. Trypsinogen

✅ Correct Answer: 2

Purkinje fibres are connected with impulse conducting system of

1. Heart
2. Brain
3. Skin
4. Kidney nephrons

✅ Correct Answer: 1

Which one are granulocytes.

1. Neutrophils, eosinophils, basophils
2. Basophils, monocytes, lymphocytes
3. Eosinophils, basophils, monocytes
4. Neutrophis, basophilis, lymphocytes

✅ Correct Answer: 1

Thoracic duct is associated with

1. Innominate vein
2. Aorta
3. Hepatic duct
4. Purkinje fibres

✅ Correct Answer: 1

Species of Saccharum originally grown in India was

1. S. boulardii
2. S.munja
3. S. officinarum
4. S.barberi

✅ Correct Answer: 4

Phase of menstrual cycle when ovulation occurs in

1. Secretory
2. Menstrual
3. Proliferative
4. Luteal

✅ Correct Answer: 3

Prostate gland produces a secretion for

1. On kidney
2. Testis
3. Around urethra
4. On Ureter

✅ Correct Answer: 3

Extra structure which provides nutrition to embryo is

1. Umbilicus
2. Chorion
3. Amnion
4. Placenta

✅ Correct Answer: 4

Function of protein bindin in acrosomal process is to

1. Ensure fertilisation of egg by a sperm of same species
2. Severe the sperm tail
3. Prevent polyspermy
4. Digest vitelline layer

✅ Correct Answer: 1

Extra-embryonic membranes of mammalian embryo are derived from

1. Trophoblast
2. Inner cell mass
3. Formative cell
4. Follicle cells

✅ Correct Answer: 1

32 - celled stage of human embryo is

1. Four times the size of fertilised egg
2. Two times the size of fertilised egg
3. Same size as fertilised egg
4. Smaller than fertilised egg

✅ Correct Answer: 3

Sertoli cells occur in

1. Ovaries and secrete progesterone
2. Seminiferous tubules and provide nutrition to germ cells
3. Pancreas and secrete cholecystokinin
4. Adrenal cortex and secrete adrenaline

✅ Correct Answer: 2

Polar body is produced during the formation of

1. Sperm
2. Secondary oocyte
3. Oogonium
4. Spermatocytes

✅ Correct Answer: 2

Release of second polar body from human egg occurs

1. After fertilization
2. After entry of sperm
3. Before sperm entry
4. No relation with sperm entry

✅ Correct Answer: 2

Which one is produced by mesoderm?

1. Heart and notochord
2. Heart and brain
3. Brain
4. Spinal cord

✅ Correct Answer: 1

Tunica albuginea is related to

1. Liver
2. Spleen
3. Lungs
4. None of the above

✅ Correct Answer: 4

UV radiations from sunlight produces

1. Sulphur di oxide
2. Ozone
3. CO
4. None of the above

✅ Correct Answer: 2

Natural sink of stratospheric ozone is

1. HCFC
2. Sulphur dioxide
3. Freons
4. Sulphuric fluxes of oceans

✅ Correct Answer: 3

Water pollution is due to

1. Sulphur dioxide
2. Carbon dioxide
3. Oxygen
4. Industrial discharges

✅ Correct Answer: 4

Which is most ionising

1. X-rays
2. Y-rays
3. Alfa rays
4. None of the above

✅ Correct Answer: 3

Sound becomes hazardous noise pollution level

1. Above 30dB
2. Above 40 dB
3. Above 100dB
4. Above 80dB

✅ Correct Answer: 4

Water blooms are formed by

1. Lemna
2. Hydrilla
3. Water hyacinth
4. Planktonic algae

✅ Correct Answer: 4

Which of the following statements is false about age pyramids?

1. The shape of the pyramids reflects the growth status of the population.
2. If in an age pyramid, post reproductive individuals are minimum, it will be
3. For human population, the age pyramids generally show age distribution of m
4. In declining population, the number of pre-reproductive individuals is hig

✅ Correct Answer: 4