22339 + Interview Questions in Biology in Class 11 Page 248 InterviewSolution

12351.	Question : Retaining feces in the rectum due to intake of fibre in the diet is called ………..
Answer» VOMITING INDIGESTION CONSTIPATION DIARRHOEA SOLUTION :N/A

Discussion

12352.	Question : Reticular fibres in the lymph nodes filter
Answer» blood to remove BACTERIA blood remove worn out CELLS LYMPH to remove bacteria lymph to remove lymphocytes Answer :C

Discussion

12353.	Question : Restriction endonucleases :
Answer» Are present in mammalion cells for degradation of DNA when the cells dies Are USED in genetic ENGINEERING for ligating two DNA molecules Are used for INVITRO DNA syntnesis Are synthesized by BACTERIA as part of their defense mechanism Answer :D

Discussion

12354.	Question : Restoration of ecological equilibrium in mined areas can be achieved through
Answer» Revetgation of the mined habitats Conversion of mined habitats into AGRICULTURE ECOSYSTEMS Prevention of SOIL erosion Prevention of grazing Solution :N//A

Discussion

12355.	Question : Resting membrane potentil is maintained by
Answer» Hormones Neurotransmitters Ion pumps None of the above Answer :C

Discussion

12356.	Question : Resting membrane potential is maintained by
Answer» Hormones Neurotransmitters Ion pumps None of the above Solution :During resting POTENTIAL ionic gradient is FORMED by active transport of ions `(Na^(+), K^(+)" pump"), 3Na^(+)` expelled out and `2K^(+)` ENTERS INSIDE.

Discussion

12357.	Question : Resting membrane potential is maintainedby
Answer» hormones neurotransmitters ions pumps none of the above Solution :The concentration gradients across the resting membrane are MAINTAINED by the active transport of ions by the sodium-potassium pump which TRANSPORTS `3 Na^+` OUTWARD for `2 K^+` into cell.

Discussion

12358.	Question : Respiratory system of cockreach is formed of spiracles and tracheal interconnectioms. Why is it said to be more efficient than that of earthworm?
Answer» SOLUTION :1. Earthworm has no special respiratory organs. The diffusion of repiratory gases `(O_(2), and CO_(2))` TAKES place through the moist skin only. 2. In cockroach BRANCHED tubes known trachea open through 10 PAIRS of small holes on the lateral side of the body, is REGULATED 3. The opening and closing by valves & sphincter muscles. Thus the respiratory system of cockroach is welldeveloped as compared to earthworm.

Discussion

12359.	Question : Respiratory treesare found in
Answer» sea water sea URCHIN BRITTLE star sea cucumber ANSWER :D

Discussion

12360.	Question : Respiratory system of cockroach is formed of spiracles and tracheal interconnections. Why is it said to be more efficient than that of earthworm? Why inspiration of cockroach is said to be a passive process while it is an active process in man?
Answer» Solution :The respiratory SYSTEM of cockroach is well developed compared with other terrestrial insects. Branched TUBES known as trachea open through 10 pairs of SMALL HOLES CALLED spiracles or stigmata

Discussion

12361.	Question : Respiratory roots are found in .......
Answer» SOLUTION :AVICENNIA

Discussion

12362.	Question : Respiratory roots are found in ………………………...
Answer» SWEET POTATO Bruguiera Mango DAHLIA SOLUTION :Bruguiera

Discussion

12363.	Question : Respiratory quotient is zero in succulent plants. Why ?
Answer» Solution :In some SUCCULENT PLANTS like Opuntia, Bryophyllum carbohydrates are partially oxidised to organic acid, particularly malic acid without corresponding release of `CO_(2)` but `O_(2)` is consumed hence the RQ value will be ZERO.

Discussion

12364.	Question : Respiratory quotient (RQ) for carbohydrates is 1. Why?
Answer» SOLUTION :SUBSTRATE CARBOHYDRATE is COMPLETELY oxidised. 6 `CO_2 // 6O_2`

Discussion

12365.	Question : Respiratory quotient is definedas :
Answer» More `O_(2)`concentration in blood More `CO_(2)`concentration in blood Accumulationof bloodin brain All of these ANSWER :B

Discussion

12366.	Question : Respiratory quotient of glucose in presence of oxygen is ………….. .
Answer» UNITY INFINITY LESS than unity Zero Answer :A

Discussion

12367.	Question : Respiratory process is regulated by certain specialized centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation
Answer» MEDULLARY INSPIRATORY centre Pneumotaxic centre Apneustic centre Chemosensitive centre Answer :A::C

Discussion

12368.	Question : Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation.
Answer» MEDULLARY inspiratory CENTRE Pneumotaxic centre Apneustic centre Chemosensitive centre Solution :Pneumotaxic centre is located in the dorsal PART of pons varoli. The function of the pneumotaxiccentre is primarily to LIMIT inspiration.

Discussion

12369.	Question : Respiratory quotient isdefined as :
Answer» `("Volume of " CO_(2)"FORMED")/("VOLUMEOF " CO_(2)"used")` `("Volume of " CO_(2) " formed")/("Volume of "O_(2) "used")` `("Volume of " O_(2)" formed")/("Accumulation of bloodin brain")` `("Volume of " O_(2) "formed")/("Volume of " N_(2)"Used")` Answer :B

Discussion

12370.	Question : Respiratorypigmenthaemocyanin is present in
Answer» Chelicerates and CRUSTACEANS Chelicerates and INSECTS Insects and muriapods Crustaceans and insects ANSWER :A

Discussion

12371.	Question : Respiratory pigment in molluscsis
Answer» HAEMOERYTHRIN HAEMOGLOBIN haemocyanin chlorocruorin ANSWER :C

Discussion

12372.	Question : Respiratorypathway is believedto be a catabolic pathway. However, nature of TCA cycle is amphibolic . Explain.
Answer» Solution :In living ORGANISMS energy is formed during respiration which is built in the form of ATPat the end of break down of substances like glucose and fats. The beginingof thisprocess is done in cytoplasm with glycolysis. In whichPyruvicacid is formed that is converted into acetyl CoAlater. Whichenters in stoma of mitochondria.So TCAcycle keepsgoing. This CYCLE is called amphibolic pathwaybecause many INTER mediate substances are made which are useful for other processes. eg. coenzymes, vitamins,Hormones,More over fatty ACID. Amino acid etc. Fatty acidsteroides, carotionides, Turpenis and Aromaticmaterials are made from acetyl CoA. alpha` - ketoglutarate and oxalo ACETATE, amino acid are useful materials forglutamate and aspartate, Moreover from pyrimidinesand alkaloid succinile, cytochromeand chlorophyll aremade. So in thiscyclebreak down and formation. both the processes occur in sequence. So it iscalled amphibolic pathway.

Discussion

12373.	Question :Respiratoryorgansof kingcrab are calledbook-gills.why ?
Answer» SOLUTION :A BOOK-gillconsists of manythinvescularlamellaeliketheleaves in a book . HENCETHE nameandthelamellaeget `O_(2)`FROMWATER .

Discussion

12374.	Question : Respiratory organs of Saccoglossus are
Answer» SPIRACLES lungs gills BOOK lungs ANSWER :C

Discussion

12375.	Question :Respiratory movements are controlled by
Answer» Cerebellum Cercbrum MEDULLA OBLONGATA Crura cerebri Solution :Medulla oblongata

Discussion

12376.	Question : Respiratory enzymes are present in which of the following organella ?
Answer» Peroxisome Chloroplast MITOCHONDRIA Lysosome Answer :C

Discussion

12377.	Question : Respiratory control centre is present in
Answer» thorax aortic arch medulla oblongata lungs

Discussion

12378.	Question : The respiratory centre is present in the
Answer» Cerebellum MEDULLA OBLONGATA Hypothalamus Cerecbrum Solution :Medulla oblongata

Discussion

12379.	Question : Respiratory centre of brain is stimulated by
Answer» CARBON DIOXIDE CONTENT in VENOUS blood Carbon dioxide content in ARTERIAL blood Oxygen content in venous blood Oxygen content in arterial blood Solution :Oxygen content in arterial blood

Discussion

12380.	Question : Respiratory centre of brain is sensitive to
Answer» more `O_(2)`CONCENTRATION in BLOOD more `CO_(2)`concentration in blood accumulation of blood in brain all of these

Discussion

12381.	Question : Respiration that takes place in the tissue cells is known as
Answer» AEROBIC RESPIRATION inspiration internal respiration cutaneous respiration

Discussion

12382.	Question : Respiration requires O_(2) . How did the first cells on the earth manage to survive in an atmosphere that lacked O_(2) ?
Answer» Solution :`O_(2)`is not ALWAYS required for respiration. Some living organismssurvive in ABSENCE of `O_(2)`by doing anaerobic respiration. The first cell on the earth, like photosyntheticbacteria are PROKARYOTIC type organismson the earth theyobtained energy by BREAK down of inorganicsubstances. e.g. In chemosynthetic bacteria (Sulphur bacteria) chemosynthesisoccurs in following WAY `12 H_(12) S + 6CO_(2) to C_(6) H_(12) O_(6) + 6H_(2) O + 12S darr`

Discussion

12383.	Question : Respirationresult in :
Answer» Release of `O_(2)` ANABOLISM TRANSFER of `CO_(2)` Release of `CO_(2)` ANSWER :D

Discussion

12384.	Question : Respiration of molluscs is by gills called ...........
Answer» ANSWER :CTENIDIA

Discussion

12385.	Question : Respiration is controlled by:
Answer» MEDULLA OBLONGATA cerebellum hypothalamus cerebrum

Discussion

12386.	Question : Respiration is an energy releasing and enzymatically controlled catabolic process whichinvolves a step-wise oxidative breakdown of organic substances inside living cells. In thisstatementaboutrespiration explainthe meaning of (a) Step-wise oxidationbreakdown(b) Organicsubstances (used as substrates)
Answer» SOLUTION :(a) Phase wise/step wise oxidation breakdown : Respiration is a phase wise/step wise oxidation of ORGANICSUBSTANCE. In whichthree main phases are included. (i) Glycolysis (ii) Krabes. cycle (iii)electron transportsystem . Glucose passes from phase wise catalysed enzymatic processes and at the end forms `H_(2) O + ATP + CO_(2)` (b) Organic substances : It is normally FOUNDIN livingsystem. Theyare generally in carbon atom.s ring formor in long chain form . Hydrogen, Oxygen and Nitrogenatoms are joinedwith it. eg. Glucose , Fatty acid, Amino acid etc. These substances are combusted and energy is produced. The respiration of glucose and fatty acid is called FLOATING respiration while of Amino acid is called protoplasmic respiration.

Discussion

12387.	Question : Respiration in insects is called direct because
Answer» The tissues exchange `O_2/ CO_2` DIRECTLY with the air in the tubes The tissues exchange `O_2/CO_2` directly with coelomic fluid The tissues exchange `O_2/CO_2` directly with the air OUTSIDE through body surface Tracheal tubes exchange `O_2/CO_2` directly with the haemocoel which then exchange with tissues Answer :A::B::C::D

Discussion

12388.	Question : Respiration by tracheal system occurs in
Answer» FROG RAT EARTHWORM COCKROACH ANSWER :D

Discussion

12389.	Question : Resolving power of SEM is_____
Answer» 5-10Å 2-10Å 5-20nm 5-20nm Solution :5-20 NM

Discussion

12390.	Question : Respiration is controlled by :
Answer» Medulla oblongata CEREBELLUM HYPOTHALAMUS CEREBRUM ANSWER :A

Discussion

12391.	Question : Resistance of jessida in cotton plants and to cereal leaf beetle in wheat plants is due to
Answer» BIOCHEMICAL characters physiological characters morphological characters none of these Answer :C

Discussion

12392.	Question : Resistance in the airways is typically low. Why? Give two reasons.
Answer» Solution :The airway RESISTANCE is low because 1. The diameter of most airways is relatively LARGE. 2. For snmaller airways there are MANY in parallel, MAKING their combined diameter large. 3. Air has a low viscosity

Discussion

12393.	Question : Resin is a product of
Answer» A fern A conifer A cycad A monocot Answer :B

Discussion

12394.	Question : Resin duct
Answer» Solution :LOCATION : It is LOCATED in main CORTEX of ground tissue of sunflower STEM. Function : Resin SECRETING from it gives mechanical strength and durability to stem.

Discussion

12395.	Question : Resin canals are
Answer» Schizogenous CAVITIES Lysigenous cavities Schizolysigneous cavities Large spaces Answer :A

Discussion

12396.	Question : Residual volume is
Answer» LESSER than TIDAL VOLUME greater than INSPIRATORY volume greater than VITAL caapcity greater than tidal volume

Discussion

12397.	Question : Reserved material in prokaryotic cells is stored as :
Answer» INCLUSION Bodies Mesosome Polysome BASAL body Answer :A

Discussion

12398.	Question : Reservoir of gaseous cycle is
Answer» Lithosphere Hydrosphere Atmosphere Stratosphere Answer :C

Discussion

12399.	Question : Reserve food is starch in
Answer» CHLOROPHYCEAE Mycophyceae Phaeophyceae Rhodphyceae ANSWER :A

Discussion

12400.	Question : Reserve food in the cystic form of Entamoeba histolytica is in the form of
Answer» Chromatoid BODIES and GLYCOGEN granules Haemoglobin and haemozoin Glycogen MASS and haemozoin Haemoglobin and glycogen granules Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : Retaining feces in the rectum due to intake of fibre in the diet is called ………..

Question : Reticular fibres in the lymph nodes filter

Question : Restriction endonucleases :

Question : Restoration of ecological equilibrium in mined areas can be achieved through

Question : Resting membrane potentil is maintained by

Question : Resting membrane potential is maintained by

Question : Resting membrane potential is maintainedby

Question : Respiratory system of cockreach is formed of spiracles and tracheal interconnectioms. Why is it said to be more efficient than that of earthworm?

Question : Respiratory treesare found in

Question : Respiratory system of cockroach is formed of spiracles and tracheal interconnections. Why is it said to be more efficient than that of earthworm? Why inspiration of cockroach is said to be a passive process while it is an active process in man?

Question : Respiratory roots are found in .......

Question : Respiratory roots are found in ………………………...

Question : Respiratory quotient is zero in succulent plants. Why ?

Question : Respiratory quotient (RQ) for carbohydrates is 1. Why?

Question : Respiratory quotient is definedas :

Question : Respiratory quotient of glucose in presence of oxygen is ………….. .

Question : Respiratory process is regulated by certain specialized centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation

Question : Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation.

Question : Respiratory quotient isdefined as :

Question : Respiratorypigmenthaemocyanin is present in

Question : Respiratory pigment in molluscsis

Question : Respiratorypathway is believedto be a catabolic pathway. However, nature of TCA cycle is amphibolic . Explain.

Question :Respiratoryorgansof kingcrab are calledbook-gills.why ?

Question : Respiratory organs of Saccoglossus are

Question :Respiratory movements are controlled by

Question : Respiratory enzymes are present in which of the following organella ?

Question : Respiratory control centre is present in

Question : The respiratory centre is present in the

Question : Respiratory centre of brain is stimulated by

Question : Respiratory centre of brain is sensitive to

Question : Respiration that takes place in the tissue cells is known as

Question : Respiration requires O_(2) . How did the first cells on the earth manage to survive in an atmosphere that lacked O_(2) ?

Question : Respirationresult in :

Question : Respiration of molluscs is by gills called ...........

Question : Respiration is controlled by:

Question : Respiration in insects is called direct because

Question : Respiration by tracheal system occurs in

Question : Resolving power of SEM is_____

Question : Respiration is controlled by :

Question : Resistance of jessida in cotton plants and to cereal leaf beetle in wheat plants is due to

Question : Resistance in the airways is typically low. Why? Give two reasons.

Question : Resin is a product of

Question : Resin duct

Question : Resin canals are

Question : Residual volume is

Question : Reserved material in prokaryotic cells is stored as :

Question : Reservoir of gaseous cycle is

Question : Reserve food is starch in

Question : Reserve food in the cystic form of Entamoeba histolytica is in the form of