Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

7451.

Question : What is the special arrangement seen in the leaves of C_(4) plants?

Answer»

SOLUTION :KRANZ ANATOMY.
Discussion
7452.

Question : What is the space between arachnoid and piameter called ?

Answer»

Supra-arachnoid SPACE
Sub-arachnoid space
Subdural space
Meninges

Solution :PIAMETER is the innermost membrane of the BRAIN and arachnoid is the middle membrane.The space between arachnoid and piameter is called sub-arachnoid space.This space is FILLED with cerebrospinal fluid
Discussion
7453.

Question : What is the source of oxygen released during photosynthesis ?

Answer»

SOLUTION :WATER .
Discussion
7454.

Question : What is the source of nuclear envelope ?

Answer»

Solution :SMALL veiscles formed by breakdown of NUCLEAR ENVELOPE during PROPHASE.
Discussion
7455.

Question : What is the source of energy for muscle contraction ?

Answer»

Solution :ATP is source of energy for muscle contraction. In each myosin MOLECULE ATPase enzyme is present at the HEAD region.
In the presence of this enzyme along with `Ca^ (2+)` and `Mg^ (2+)` ions. ATP molecule dissociate into ADP + PI and energy is released from the head of myosin with the energy obtained from ATP, excited myosin forms cross-bridge with actin and muscle contraction is INITIATED.
Discussion
7456.

Question : What is the site of gaseous exchangein an insect ?

Answer»

SOLUTION :In insects the air enters the spiracles during INSPIRATION and reaches the trached which CONTAIN tissue fluids OXYGEN in the air dissolves in those fluids and reaches the CELLS of the tissue.
Discussion
7457.

Question : What is the similarity and dissimilarity between ‘whole moong dal’ and ‘broken moong dal’ in terms of respiration and growth? Based on these parameters classify them into living or non - living?

Answer»

Solution :
We can CONCLUDE that broken moong dal does not have viable embryo so does not germinate and does not SHOW any metabolism and GROWTH but it has great nutritive value as it has good amount of PROTEIN and MINERALS.
Discussion
7458.

Question : What is the significance of vacuole in a plant cell ?

Answer»

Solution :It CONTAINS CELL sap and HELPS to maintain the osmotic PRESSURE of the cell.
Discussion
7459.

Question : What is the significance of time gap in hthe passage of action potential from sino-atrial node to he ventricle ?

Answer»

Solution :Ventricle gets relaxed during time period of pathway from ACTIVE capacity SA node to ventricle. As a result ventricular pressure DECREASES and semilunar valve gets closed & that prevents BACK flow OFBLOOD in ventricle.
Discussion
7460.

Question : What is the significance of step--wise release of energy in respiration ?

Answer»

Solution :Glycolysis FORMATION 2 ATP
OXIDATIVE phosphorylation of `2NADH_(2)`, 6 ATP are formed.
When Pyruvic acidenters intomitochondria, 2 ATP are used
30 ATP are formed in TCA cycleand ETS.
ITgets used in various physiological processes of living organisms.
Discussion
7461.

Question : What is the significance of prostate glands in earthworm?

Answer»

SOLUTION :A pair of prostate glands LIES in the 18th 19th segments. The SECRETION of the prostate GLAND serves to cement the spermatozoa into bundles known as SPERMATOPHORES.
Discussion
7462.

Question : What is the significance of meiosis?'

Answer»

SOLUTION :PLEASE REFER TEXT.
Discussion
7463.

Question : What is the significance of Luteotropic hormone (LTH)?

Answer»

Solution :Luteo Tropic Hormone is also called luteotropin or lactogenic hormone or prolactin or mammotropin. It is a PROTEIN hormone which stimulates MILK secretion after the CHILD BIRTH in females. HIGH prolactin secretion during lactation suppresses LH secretion and ovulation since it induces the corpus luteum hence named as luteo tropic hormone.
Discussion
7464.

Question : What is the significance of hepatic portal system in the circlatory system ?

Answer»

Solution :In all VERTEBRATES SPECIAL vascular connection at blood circulatory path is seen between digestive tract and liver. It is called as hepatic portal SYSTEM.
Excess nutrients, glucose, amino acids absorbed from digestive tract are stored in liver and when it is required it can be utilized.
AMMONIA is converted into urea that is disposed by KIDNEY.
Discussion
7465.

Question : What is the significance of cladistic classification?

Answer»

SOLUTION :Cladistic classification takes into account ancestral characters (traits commons for the entire group) and derived characters (traits WHOSE structure and function and function DIFFER from the ancestral characters). The accumulation of derived characters resulted in the formation of new SUBSPECIES.
Discussion
7466.

Question : What is the significance of biconcave shape of RBC?

Answer»

Solution :The biconcave SHAPE increases the surface area to volume ratio. HENCE OXYGEN DIFFUSES quickly in and out of the cell.
Discussion
7467.

Question : What is the significance of atrioventricular node?

Answer»

Solution :Atrio-ventricular NODE is a mass of special MUSCULAR tissues that is situated in the LOWER left corner of the right atrium. The AV node picks up the wave of contraction originated by SAN.
Discussion
7468.

Question : What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart ?

Answer»

SOLUTION :When excitation reaches TILL AV node, AV stimulates contraction of ventricles. Conductions of this excitation is done by BUNDLE of His and PURKINJE fibres located in the wall of HEART.
Discussion
7469.

Question : What is the signficance of respiratory quotient ?

Answer»

Solution :SIGNIFICANCE of RQ
1. RQ VALUE indicates which types of respiration occurs in living cells, either aerobic or anaerobic.
2. It also HELPS to know which type of RESPIRATORY substrate is involved.
Discussion
7470.

Question : What is the shape of vibrium ?

Answer»

ROD SHAPED 
SPIRAL shaped 
comma-shape 
spherical 

Answer :C
Discussion
7471.

Question : What is the shape of malleus ?

Answer»

SOLUTION :HAMMER SHAPED
Discussion
7472.

Question : What is the shape of guard cells in dicotplants?

Answer»

SOLUTION :KIDNEY or BEAN SHAPED.
Discussion
7473.

Question : What is the scientific term given to earthworm’s body segments

Answer»

SOLUTION :Metam ERES is a SCIENTIFIC WORD used for segments of body of earthworm.
Discussion
7474.

Question : What is the scientific word for the edible part of mushroom above the ground?

Answer»

SOLUTION :BASIDIOCARP.
Discussion
7475.

Question : What is the scientific name of the Gold fish?

Answer»

SOLUTION :AGARICUS campestris.
Discussion
7476.

Question : What is the scientific name of tape worm?

Answer»

SOLUTION :TAENIA solium.
Discussion
7477.

Question : What is the role-played by luteininzing hormones in males and females respectively ?

Answer»

Solution :In males `(O^(-))` LH induces synthesis SECRETION of ANDROGENS from testis. ALONG with FSH, also regulates spermatogensis.
In female `(+^("O"))` LH induces ovulation from mature ovarian follicles. It maintains CORPUS luteum which secretes progesterone.
Discussion
7478.

Question : What is the role played by the luteinizing hormones, in males and females respectively ?

Answer»

SOLUTION :In Males : Activation of Leydig CELLS (INTERSTITIAL cells) to secrete testosterone and other androgens .ALSO called interstital CELL stimulating hormone.
In females : Stimulates ovulation, development of corpusluteum and secretion of progesterone, manes or pregenancy.
Discussion
7479.

Question : What is the role of xylem parenchyma?

Answer»

SOLUTION :They HELP in LATERAL CONDUCTION of WATER.
Discussion
7480.

Question : Whatis the role of Vasa recta in theconcentrationof urine ?

Answer»

Solution :1. The vasa recta, maintains the medullary OSMOTIC gradient via counter current exchanger (the flow of blood through the ascending and descending vasa recta blood vessels) by passive transport.
2. The picture shows counter current exchanger where the vasa recta PRESERVE the medullary gradient while removing reabsorbed water and solutes.

3. This system does not produce an osmotic gradient, but protects the medulla by removal of excess salts from the interstitial fluid and removing reabsorbed water.
4.The vasa recta leave the kidney at the JUNCTION between the cortex and medulla. The interstitial fluid at this point is isoosmotic to the blood.
5. When the blood leaves the efferent arteriole and enters vasa recta the osmolarity in the medulla increases (1200mOsm) and results in passive UPTAKE of solutes and loss of water.
6.As the blood enters the cortex, the osmolarity in the blood decreases (300mOsm) and the blood loses solutes and gains water to form concentrated urine (hypertonic).
7. Human kidneys can produce urine nearly four times concentrated than the INITIAL filtrate formed.
Discussion
7481.

Question : What is the role of three semicircular canals in ear ?

Answer»

SOLUTION :They are RESPONSIBLE for BALANCING the BODY
Discussion
7482.

Question : What is the role of thromboplastin?

Answer»

SOLUTION :Thromboplastin converts prothrombin to THROMBIN in the PRESENCE of `Ca^(++)` at the PLACE of injury.
Discussion
7483.

Question : What is the role of small intestine in digestion of proteins?

Answer»

Solution :Digestion in small intestine is by the pancreatic juice
(i) Trypsin HYDROLYSES proteins into peptides. Also activates other proteases .
(II) CHYMOTRYPSIN is MILK coagulating enzyme and hydrolyses casein to paracasein which then coagulates into calcium paracaseinate.
(iii) Carboxypeptidase BREAKS down the terminal peptide bond and forms amino acids and small peptides.
Discussion
7484.

Question :What is the role of second messenger in the mechanism of protein hormone action?

Answer»

Solution :The HORMONES that are derivatives of amino acids. polypeptides or proteins are called peptide hormones. These being insoluble in lipids can not enter the target cell. These act at the surface of target cell as primary messengers and bind to the cell-surface of receptor forming the hormone receptor complex.
It involves following steps
( i) Hormone called tirst messenger attaches to the cell surface receptor protein on the outer surface of plasma membrane of the target cell. forming a hormone-receptor complex.
(ii)This complex activates the enzyme adenyl cyclase.
(iii)Adenyt cyclase catalyses the conversion of ATP to cyclic AMP on the inner surface of plasma membrane.
(iv)serves as the second messenger or intraceliuar HORMONAL mediator delivering INFORMATION insude the target cells. This activates appropriate CELLULAR enzyme system by cascade effect. Which induces the cell machinery to perform its specialised function.
cAMP has a very short existence. It is rapidly degraded by the cAMP phosphodiesterase Water soluble hormones. such as amines. peptides, proteins and glycoproteins exert their controi through the cyclic AMP. These are quick acting hormones and produce immediate effect.
Discussion
7485.

Question : What is the role of second messenger in the mechanism of protein hormone action ?

Answer»

SOLUTION :Protein hormones can not enter target CELL. First messenger forms hormone receptor complex at the receptor site of plasma membrane.
This complex stimulate enzyme adenyl cyclase, Adenyl cyclase, Adenly cyclase enzyme, CONVERTS ATP into cAMP at the inner surface of plasma membrane.cAMP conducts information into target cell as secondary messenger which induces specific enzyme system by cascade effect for specific FUNCTION.
Discussion
7486.

Question : What is the role of second messenger in hormone action ?

Answer»

SOLUTION :It is not due to deficiency of thyroid HORMONE but situation developed due to its excessive SECRETION.
Discussion
7487.

Question : What is the role of Schwann cell?

Answer»

SOLUTION :SCHWANN cells PRODUCE the MYELIN sheath.
Discussion
7488.

Question : What is the role of roughage in the diet?

Answer»
Discussion
7489.

Question : What is the role of pyloric sphincter?

Answer»

Solution :Pyloric sphincter is present as a ring of MUSCLES between the STOMACH and duodenum. It ALLOWS a small amount of food to move from stomach to duodenum when it OPENS.
Discussion
7490.

Question : What is the role of radula in molluscs ?

Answer»

SOLUTION :Radula is a file-like rasping organ FOUND in molluscs. It helps in scraping and scratching the food. It also helps in creating depressions in rocks. Such depressions are used by these ANIMALS as HOME.
Discussion
7491.

Question : What is the role of receptor protein molecules of cell membrane ?

Answer»

Solution :CELL surface receptor molecules recognize and BIND specific molecules in the cell's SURROUNDINGS.
Discussion
7492.

Question : What is the role of plasmodesmata in a plant cell?

Answer»

SOLUTION :PLASMODESMATA actas a channelbetween the PROTOPLASMOF adjacent cellsthrough which many SUBSTANCES pass through.
Discussion
7493.

Question : What is the role of PGR ?

Answer»

Solution :For any and every phase of growth, differentiation and development of plants, one or the other
PGR has some role to play.
Such roles could be complimentary or antagonistic.
These could be individualistic or synergistic.
Similarly, there are a number of EVENTS in the life of a plant where more than one PGR interact to affect that event, e.g., dormancy in seeds/ BUDS, abscission, sensence, APICAL DOMINANCE, etc.
 The role of PGR is of only one kind of intrinsic control.
Along with genomic control and extrinsic FACTORS, they play an important role in plant growth and development.
Many of the extrinsic factors such as temperature and light, control plant growth and development via PGR.
Some of such events could be: vernalisation, flowering, dormancy, seed germination, plant movements, etc.
Discussion
7494.

Question : What is the role of photorespiration?

Answer»

Solution :To protect the PLANT from photooxidation DAMAGE, during high LIGHT and LIMITED `CO_(2)`supply
Discussion
7495.

Question : What is the role of offerent arteriole in the formation of vasa recta?

Answer»

Solution :The offerent arteriolo serving the medullary nephron FORMS bundles of long straight VESSEL called vasa l'ecta and runs PARALLEL to the loop of HENLE. Vasa recta is absent or REDUCED in cortical nephrons.
Discussion
7496.

Question : What is the role of nucleus in the cell ?

Answer»

Solution :* Control activities of the cell.
* GENETIC information copied from cell to cell while the cell divides.
* herediatary characters are PASSED onto new individuals when gametic cells FUSE together in sexual reproduction.
Discussion
7497.

Question : What is the role of national gardens in conserving biodiversity-discuss

Answer»

Solution :Botanical Gardens plays the following important roles.
Gardens with aesthetic value which ATTRACT a large number of visitors. For exmple , the Great Banyan Tree (FICUS benghalensis) in the Indian Botanical Garder at Kolkata
2. Gardens have a WIDE range of species and supply taxonomic material for botanical research.
3. GARDEN is USED for self-instruction or demonstration purposes.
Discussion
7498.

Question : What is the role of MPF in Cell cycle ?

Answer»

SOLUTION :MATURATION PROMOTING FACTOR (MPF) brings about condensation of interphase chromosomes into the MITOTIC form.
Discussion
7499.

Question : What is the role of melanocyte stimulating hormone ?

Answer»

SOLUTION :ACTS on melanocytes and REGULATES PIGMENTATION of skin.
Discussion
7500.

Question : What is the role of Luteinizing hormone (LH)?

Answer»

Solution :Luteinizing Hormone is a GLYCOPROTEIN hormone which is also known as INTERSTITIAL cell stimulating hormone (ICSH). In males, ICSH acts on the interstitial cells of testis to produce the male sex hormone, testosterone. In females, LH along with FSH matures the ovarian follicles. LH independently induces ovulation, maintains the corpus luteum and promotes synthesis and release of ovarian hormones. FSH and LH are collectively REFERRED as gonadotropins. FSH and LH are not PRODUCED during childhood. The secretion of FSH and LH STARTS only during prepubertal period.
Discussion