22339 + Interview Questions in Biology in Class 11 Page 234 InterviewSolution

11651.	Question : Relay pump theory of Godlewski was proved in the year
Answer» Solution :PERIODIC CHANGES in OSMOTIC PRESSURE of living cells of the xylem parenchyma and MEDULLARY ray act as a pump for the movement of water.

Discussion

11652.	Question : State Relay Pump theory.
Answer» SOLUTION :Periodic changes in osmoticpressure of livingcells of the XYLEM parenchyma and MEDULLARY ray act as a pump for the movement of water.

Discussion

11653.	Question : State one major difference between primary cell wall and secondary cell wall.
Answer» Solution :Primary cell wall is outer, ELASTIC, thinner wall while SECONDARY cell wall is inner, THICKER and INELASTIC wall DEPOSITED with cutin or lignin or suberin

Discussion

11654.	Question : State one major difference between SER and RER
Answer» SOLUTION :RER is formed of RIBOSOMES-studded cisternae, while SER is formed of tubules WITHOUT ribosomes

Discussion

11655.	Question : State one major difference between plant cell and animal cell.
Answer» Solution :Plant CELL has cell WALL and chloroplasts but is WITHOUT centriole, while ANIMAL cell LACKS cell wall and chloroplasts but has centriole

Discussion

11656.	Question : State one major difference between pinocytosis and phagocytosis.
Answer» Solution :Pinocytosis INVOLVES intaking of LARGE SIZED LIQUID macrobiomolecules through PLASMA membrane, while phagocytosis is intaking of solid macrobiomolecules through it.

Discussion

11657.	Question : State one major difference between passive transport and active transport.
Answer» SOLUTION :Passive TRANSPORT is not energy dependent while ACTIVE transport is energy-dependent

Discussion

11658.	Question :State one major difference between centriole and basal body.
Answer» Solution :CENTRIOLE LIES NEAR NUCLEUS, while BASAL body lies in ectoplasm

Discussion

11659.	Question : State one major difference between heterochromatin and euchromatin.
Answer» Solution :Heterochromatin is DARKLY STAINED, CONDENSED and transcriptionally inactive PARTS of DNA, while euchromatin is LIGHTLY stained, extended and transcriptionally active parts of DNA

Discussion

11660.	Question : State one major difference between cell organelles and cell inclusions.
Answer» Solution :Cell ORGANELLES are LIVING STRUCTURES of CYTOPLASM, while cell inclusions are non-living cyrcplasmic structures

Discussion

11661.	Question : State one major difference between centriole and flagellum.
Answer» Solution :Centriole has 9 +0 ARRANGEMENT of MICROTUBULES, while FLAGELLUM has 9 +2 arrangement of microtubules

Discussion

11662.	Question : State one gene one enzyme hypothesis.
Answer» SOLUTION :The EXPERIMENTS of George Beadle and EDWARD Tatum in the early 1940.s on Neurospora crassa (the RED bread mould) led them to propose one GENE-one enzyme hypothesis, which states that one gene controls the production of one enzyme. This is called one gene one enzyme hypothesis.

Discussion

11663.	Question : State one difference between spongy bone and compact bone.
Answer» Solution :Spongy BONE is with red bone marrow but no REGULAR HAVERSIAN system while COMPACT bone have YELLOW bone marrow and is with regular haversion systems .

Discussion

11664.	Question : State one difference between single-unit and multi-unit smooth muscles.
Answer» SOLUTION :SINGLE UNIT muscles CONTRACT as a sinle unit, while multi-unit muscles contract separately

Discussion

11665.	Question :State one difference between simple epithelium and compound epithelium.
Answer» SOLUTION :SIMPLE EPITHELIUM is unilaminar , while COMPOUND epithelium is multilaminar

Discussion

11666.	Question : State one difference between cystoliths and raphides.
Answer» SOLUTION :Cystoliths are crystals of calcium carbonate, while RAPHIDES are crystals of calcium OXALATE.

Discussion

11667.	Question : State location and types of adrenal gland.
Answer» Solution :Location : Our body has one pair of adrenal glands, one at the anterior part of each kidney. The gland is composed of two types of tissues. The centrally located tissue is called the adrenal medulla and outside this lies the adrenal cortex. The adrenal medulla secretes two hormones called adrenaline or epinephrine and nor-adrenaline or norepinephrine. These are commonly called as catecholamines. Adrenaline and nor-adrenaline are rapidly secreted in response to stress of any kind and during emergency situations. They are called emergency hormones or hormones of fight or flight. These hormones increase alertness, pupillary dilation, piloerection (raising of hairs). sweating etc. Both the hormones increase the heart beat, the strength of heart contraction and the rate of respiration. Catecholamines also stimulate the breakdown of glycogen resulting in an INCREASED concentration of glucose in blood. They also stimulate the breakdown of lipids and proteins. The adrenal cortex can be divided into 3 layers, called zona glomerulose (outer layer), zone fasciculate (middle layer) and zona reticularis (inner layer). The adrenal cortex secretes many hrmones, commonly called as corticoids. `alpha` - glucocorticoids - involved in carbohydrate metablism. `beta` - mineralocorticoids - regulate the balance of water and electrolytes in our boyd. Aldosterone is the main mineral corticoid in our body. Glucocorticoids stimulate, gluconeogenesis, lipolysis and proteolysis, and inhibit cellular uptake and utilisation of amino acids. Cortisol is also involved in maintaining the cordiovasular system as well as the kidneyt functions. Glucocorticoiuds, particularly cortisol, produces anti-inflammatory reactions and SUPPRESSES the immune response. Cortisol stimulates the RBC production. Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of `"Na"^(+) H_(2)O` and water and excretion of `K^(+)` and phosphate ions. Thus, aldosterone helps in the mintenance of electrolytes, body fluid volume, osmotic pressure and blood pressure. Small amunts of androgenic steroids are also secreted by the adrenal cortex which PLAY a role in the growth of axial hair, pubic hair and facial hair during puberty. Less production of hormones by adrenal cortex changes carbohydrate metabolism due to which weakness and fatigueness is observed. It leads to adison.s disease.

Discussion

11668.	Question : State Hardy - Weinberg equilibrium
Answer» Solution :HARDY of UK and Weinberg of Germany stated that the ALLELE frequencies in a population are stable and are constant from generation to generation in the absence of gene flow, genetic drift, mutation, RECOMBINATION and natural SELECTION.

Discussion

11669.	Question : Briefly explain the chemiosmotic theory.
Answer» SOLUTION :Chemisomotictheorywas proposed by P.Mitchell(1966). Accoridingto thistheoryelectronsare transported ALONGTHE membrancethrough PS Iand PS IIand connected by Cytochromeb6-f-complex.

Discussion

11670.	Question : State economically important uses of methanogens.
Answer» Solution :Methanogens, PRESENT in the GUT of several ruminant animals, HELP in the digestion of cellulose. They are RESPONSIBLE for the production of methane, the BIOGAS.

Discussion

11671.	Question : State Chargaff's rule.
Answer» SOLUTION :A=T,G`-=`C A+G=T+C A:T=G:C=1

Discussion

11672.	Question : State Blackman's law of limiting factor.
Answer» SOLUTION :" At any GIVEN pointof timethe LOWEST factoramongessentials will limit RATEOF phoosynthesis''.

Discussion

11673.	Question : State any two vital role of water in plants.
Answer» SOLUTION :(i) WATER maintains INTERNAL TEMPERATURE of plant. (ii) It maintains the turgidity of the cell.

Discussion

11674.	Question : State any two theoriesregarding mechanism of stomatal movement.
Answer» Solution :Starch - sugar interconversiontheory and Active POTASSIUM TRANSPORTION concept.

Discussion

11675.	Question : Starch-sugar inter conversion theory was supported by
Answer» LOFT field Lloyd Von Mohl Hanes Answer :B::D

Discussion

11676.	Question : Starch is turned to disaccharide in presence of
Answer» MALTASE ZYMASE DIASTASE Lactase Answer :C

Discussion

11677.	Question :Starch, cellulose, glycogen, chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a) Cotton fibre (b) Exoskeleton of cockroach (c) Liver (d) Peeled potato
Answer» SOLUTION :(a) cotton fibre - cellulose (B) EXOSKELETON of cockroach - Chitin (c) Liver - Glycogen (d) Peeled potato - Starch

Discussion

11678.	Question : Starch, cellulose, glycogen and chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a) Cotton fibre-____ (b) Exoskeleton of ant-____ (c) Liver-____ (d) Peeled potato-____
Answer» SOLUTION :(a) Cellulose (b) CHITIN, (C) Glycogen and (d) Starch.

Discussion

11679.	Question : Starch and cellulose are compounds of many units of
Answer» glycerol amino acids simple sugars fatty acids Answer :C

Discussion

11680.	Question : Star shaped sclereids are called
Answer» Trichosclereids Astrosclereids Macrosclereids Osteosclereids Answer :B

Discussion

11681.	Question : Star shaped chloroplast is seen in …………
Answer» Zygnema Spirogyra Chlamydomonas Chlorella Answer :A

Discussion

11682.	Question : Stamens are tetradynamous in family Cruciferae.
Answer» Solution :TOTAL stamens are SIX. ARRANGED in TWO whorls of 2 + 4 each.

Discussion

11683.	Question : Stamens are equivalent to ……………………
Answer» MEGASPOROPHYLL microsporophyll microsporangium megasporangium SOLUTION :megasporophyll

Discussion

11684.	Question :Stamen is also called
Answer» Carpel Prophyll MICROSPOROPHYLL Megasporphyll ANSWER :C

Discussion

11685.	Question : Stalk of leaf is called as ……………………
Answer» PEDICEL PETIOLE phylum perianth Solution :petiole

Discussion

11686.	Question :Stages of Plasmodium discovered by Ronald Ross in female Anopheles mosquito
Answer» Sporozoites OOCYSTS GAMETOCYTES MEROZOITES ANSWER :B

Discussion

11687.	Question : Stack of lamellae found inside a plastid is
Answer» THYLAKOID stroma granum OXYSOME ANSWER :A

Discussion

11688.	Question : Stability to chromosome is offered by___
Answer» Satellite TELOMERE Kinetochore Nucleolus Solution :Telomere

Discussion

11689.	Question : Squamous epithelium consists of
Answer» cube - like CELLS THIN FLATTENED cells column like cells ciliated cells ANSWER :A

Discussion

11690.	Question : Squid, cuttle fish and Octopus belongs to class of ……………….. .
Answer» decapoda SCAPHOPODA CEPHALOPODA apods SOLUTION :cephalopoda

Discussion

11691.	Question : ______is found in corolloid roots of Cycas.
Answer» Gloeocapsa Scytonema Nostoc Azolla ANSWER :C

Discussion

11692.	Question : Squamous Epithelium :
Answer» SOLUTION :Location : In the outer LAYER of the skin of frog. Function : It protects the ORGANS LOCATED below the TISSUE.

Discussion

11693.	Question : Sprouting of potato under storage condition can be prevented by
Answer» auxin gibberellin ethylene cytokinin Answer :A

Discussion

11694.	Question : Springwood- comment
Answer» SOLUTION :In the springseason ,CAMBIUM is veryactiveand producesa largenumberof xylaryelements havingvessel/tracheidswithwidelumen . The woodformedduringthis seasonis calledspringwoodor earlywood .

Discussion

11695.	Question : Spring wood and Autumn wood are found in
Answer» SAPWOOD Phellogen Heartwood both 1 & 3 Answer :D

Discussion

11696.	Question : Spout like narrow tube extending from gizzard into lumen of midgut is
Answer» Peritrophic MEMBRANE Sphincter Stomodial VALVE Hepatic caecae Answer :C

Discussion

11697.	Question : Spot of odd one out and justify your answer.
Answer» FIBRINOGEN ACTIN TROPOMYOSIN TROPONIN SOLUTION :Fibrinogen

Discussion

11698.	Question : Sporophyte of mosses contain foot, seta and capsule.
Answer» ANSWER :TRUE

Discussion

11699.	Question : Sporophytc is non vascular in
Answer» Algae Fungi BRYOPHYTES PTERIDOPHYTES ANSWER :C

Discussion

11700.	Question : Sporophylls aggregate as cones in
Answer» DRYOPTERIS FERNS Equisetum Marselia ANSWER :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : Relay pump theory of Godlewski was proved in the year

Question : State Relay Pump theory.

Question : State one major difference between primary cell wall and secondary cell wall.

Question : State one major difference between SER and RER

Question : State one major difference between plant cell and animal cell.

Question : State one major difference between pinocytosis and phagocytosis.

Question : State one major difference between passive transport and active transport.

Question :State one major difference between centriole and basal body.

Question : State one major difference between heterochromatin and euchromatin.

Question : State one major difference between cell organelles and cell inclusions.

Question : State one major difference between centriole and flagellum.

Question : State one gene one enzyme hypothesis.

Question : State one difference between spongy bone and compact bone.

Question : State one difference between single-unit and multi-unit smooth muscles.

Question :State one difference between simple epithelium and compound epithelium.

Question : State one difference between cystoliths and raphides.

Question : State location and types of adrenal gland.

Question : State Hardy - Weinberg equilibrium

Question : Briefly explain the chemiosmotic theory.

Question : State economically important uses of methanogens.

Question : State Chargaff's rule.

Question : State Blackman's law of limiting factor.

Question : State any two vital role of water in plants.

Question : State any two theoriesregarding mechanism of stomatal movement.

Question : Starch-sugar inter conversion theory was supported by

Question : Starch is turned to disaccharide in presence of

Question :Starch, cellulose, glycogen, chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a) Cotton fibre (b) Exoskeleton of cockroach (c) Liver (d) Peeled potato

Question : Starch, cellulose, glycogen and chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a) Cotton fibre-____ (b) Exoskeleton of ant-____ (c) Liver-____ (d) Peeled potato-____

Question : Starch and cellulose are compounds of many units of

Question : Star shaped sclereids are called

Question : Star shaped chloroplast is seen in …………

Question : Stamens are tetradynamous in family Cruciferae.

Question : Stamens are equivalent to ……………………

Question :Stamen is also called

Question : Stalk of leaf is called as ……………………

Question :Stages of Plasmodium discovered by Ronald Ross in female Anopheles mosquito

Question : Stack of lamellae found inside a plastid is

Question : Stability to chromosome is offered by___

Question : Squamous epithelium consists of

Question : Squid, cuttle fish and Octopus belongs to class of ……………….. .

Question : ______is found in corolloid roots of Cycas.

Question : Squamous Epithelium :

Question : Sprouting of potato under storage condition can be prevented by

Question : Springwood- comment

Question : Spring wood and Autumn wood are found in

Question : Spout like narrow tube extending from gizzard into lumen of midgut is

Question : Spot of odd one out and justify your answer.

Question : Sporophyte of mosses contain foot, seta and capsule.

Question : Sporophytc is non vascular in

Question : Sporophylls aggregate as cones in

Question : Starch, cellulose, glycogen and chitin are polysaccharides found among the following. Choose the one appropriate and write against each. (a) Cotton fibre- (b) Exoskeleton of ant- (c) Liver- (d) Peeled potato-