22339 + Interview Questions in Biology in Class 11 Page 419 InterviewSolution

20901.	Question : Answer briefly How does pepsinogen change into its active form?
Answer» SOLUTION :Inactive pepsinogen is first converted into its active form pepsinby HCl secreted by the gastric glandthen by autocatalysis more of pepsinogen gets ACTIVATED to PEPSIN.Thereafter pepsin hydrolyses the protein partially to PROTEOSES and peptones.

Discussion

20902.	Question : Answer briefly What are the basic layers of wall of alimentary canal?
Answer» Solution :SEROSA muscularis(INNER circular and outer longitudinal)SUB MUCOSA and mucosa.

Discussion

20903.	Question : Answer briefly : How do you perceive the colour of an object?
Answer» Solution :The cones are SENSITIVE to BRIGHT light and enable US to see in bright light and at DAY time. This type of vision is known as photopic vision. The cone cells are also responsible for colour vision.

Discussion

20904.	Question : Answer briefly : (b) Which part of our body helps us in maintaining the body balance ?
Answer» Solution :The INNER EAR has three semi-circular canals FORMING COCHLEA. Cochlea is responsible for maintaining the body balance. Vestibular organ is present in inner ear which is formed of three semi circular canals and the otolith (macula) is the sensory PART of saccule and utricle. Each semicircular canal lies in a different plane at right angles to each other. The membranous canals are suspended in the perilymph of the body canals. The base of the canal is swollen and is called ampulla, which contains a projecting ridge called crista, which has hair cells. The saccule and utricle contain ridge called macula The crista and macula are the specific receptors of the vestibular apparatus responsible for maintenance of balance of body and posture.

Discussion

20905.	Question : Answer briefly : (c) How does the eye regulate the amount of light that falls on the retina ?
Answer» Solution :The light rays in VISIBLE wavelength focussed on the retina through the cornea and lens generate potentials (impulses) in rods and CONES. Photosensitive compounds (photopigments) in the human eyes is composed of opsin Photo (a PROTEIN) and retinal (an aldehyde of vitamin A). Light INDUCES dissociation of the retinal from the opsin resulting in changes in the structure of opsin. This causes membrane PERMEABILITY changes. As a result, potential differences are generated in the photoreceptor cells. This produces a signal that generates action potentials in the ganglion cells through the bipolar cells. These action potentials (impulses) are transmitted by the optic nerves to the visual cortex area of the brain. Neural impulses are analysed and the image formed on the retina is recognised based on earlier memory and experience.

Discussion

20906.	Question : Do you think shape of chloroplast is unique for algae. Justify your answer.
Answer» Solution :Variation among the shape of the CHLOROPLAST is found in members of algae. It is CUP shaped(Chlamydomonas), Discoid(Chara), Girdle shaped (Ulothrix),reticulate(Oedogonium),spiral (SPIROGYRA), stellate(ZYGNEMA) and plate like (Mougeoutia).

Discussion

20907.	Question : ANS stands for……………………………………………..
Answer» ANTERIOR NERVOUS SYSTEM Anterior NEURON System Apical Nervous System AUTONOMOUS Nervous System Solution :Autonomous Nervous System

Discussion

20908.	Question : An oval depression called fossa ovalis, is seen on
Answer» INTER ATRIAL septum interventricular septum right auriculo-ventricular septum left auriculo-ventricular septum Answer :A

Discussion

20909.	Question : Another name given to 'Halophiles' is ________.
Answer» SOLUTION :SALT LOVERS

Discussion

20910.	Question : Another name for cartilage cells.
Answer» SOLUTION :CHONDROCYTES

Discussion

20911.	Question : Another name for collar bone is
Answer» scapula clavicle ischium ileum

Discussion

20912.	Question : Select the correct biological term. Cardiac muscle, atria, tricuspid valve, systole, auricles, arteries, diastole, ventricles, bicuspid valve, pulmonary artery, cardiac cycle, semi lunar valve, veins, pulmonary vein, capillaries, vena cava, aorta.Another name for atria.
Answer» SOLUTION :ARTERIES

Discussion

20913.	Question : Another name for 'blue green' bacteria.
Answer» SOLUTION :CYANOBACTERIA.

Discussion

20914.	Question : Anomalous secondary growth in monocots is seen in
Answer» Dracaena Aloe Yucca All of the above Answer :D

Discussion

20915.	Question : Anomalous secondary growth found in dicot root of
Answer» RAPHANUS Dacus BETA All Answer :D

Discussion

20916.	Question : Annual rings are the number of:
Answer» RINGS of vascular BUNDLES in a monocot STEM layers of SECONDARY xylem in a stem internodes in a stem both (b) and (c) Solution :layers of secondary xylem in a stem

Discussion

20917.	Question : Annual rings are distinct in plants growing in
Answer» ARCTIC REGIONS TEMPERATE regions Tropical region Grass lands Answer :B

Discussion

20918.	Question : Annual ring is
Answer» Meristematic and PRODUCE SECONDARY xylem and secondary PHLOEM centripetally and centrifugally Dead and produce secondary xylem and secondary phloem centripetally and centrifugally Secondary xylem and secondary phloem PRODUCED by VASCULAR cambium Secondary xylem produced by vascular cambium Answer :D

Discussion

20919.	Question : Annelida have a true body cavity.
Answer» ANSWER :T

Discussion

20920.	Question : Annelida is characterised
Answer» pseudocoelom metamerism non-muscular pharynx renette gland Answer :B

Discussion

20921.	Question : Ankle joint is: .............
Answer» PIVOT JOINT BALL and SOCKET joint Hinge joint GLIDING joint Solution :Gliding joint

Discussion

20922.	Question : Anisotropic band are made up of ........
Answer» MYOSIN filaments Actin filaments Elastin filaments Both A and B Solution :Both A and B

Discussion

20923.	Question : Animals without coelom are known as ……….
Answer» SOLUTION :ACOELOMATES

Discussion

20924.	Question : Animals with longest life span are
Answer» TURTLES SNAKES CROCODILES LIZARDS ANSWER :A

Discussion

20925.	Question : Animals which live on the floor of sea are called benthic.
Answer» ANSWER :1

Discussion

20926.	Question : Animals which excrete urea produced during metabolism of amino acids is (a) ureotelism(b) uricotelism(c) ammonotelism(d) aminotelism
Answer» rueotelism uricotelism ammonotelism aminotelism

Discussion

20927.	Question : Animals undergoing inactive stage during winter is known as(a) aestivation(b) hibernation(c) adaptation(d) acclimatization
Answer» AESTIVATION hibernation adaptation ACCLIMATIZATION

Discussion

20928.	Question : Animals that have three layers of embryonic tissue buthave organs in a cavity that is not completely lined with mesoderm are :
Answer» ACOELOMATE eucoelomate PSEUDOCOELOMATE COELOMATE SOLUTION :pseudocoelomate

Discussion

20929.	Question :Animals that have three layers of embryonic tissue andhave one solid mass of tissue rather than tissues and organs nestled inside a body cavity are :
Answer» ACOELOMATE eucoelomate PSEUDOCOELOMATE COELOMATE SOLUTION :acoelomate

Discussion

20930.	Question : Animals that excrete ammonia are called .........
Answer» SOLUTION :ammonoteles

Discussion

20931.	Question : Animals that do not possess a backbone are called ……….
Answer» SOLUTION :INVERTEBRATES

Discussion

20932.	Question : Animals possess nerve or nervous systems to respond to their environment. But the single celled amoeba does not possesses any nerve cell , so, how it come to know whether a particle it encounters is a grain of sand and not its dinner by /
Answer» thermotaxis skin hormones chemotaxis ANSWER :D

Discussion

20933.	Question : Animals having pseudocoelomate and triploblastic nature are present in phyla ……………….. .
Answer» ANNELIDA ARTHROPODA ASCHELMINTHES PLATYHELMINTHES SOLUTION :aschelminthes

Discussion

20934.	Question : Animals giving bith to young ones:
Answer» Oviparous Oviviviparous Viviparous Both a and b Answer :C

Discussion

20935.	Question : Animals devoid of respiratory, excretory and circulatory organs belong to phylum ………………….. .
Answer» ECHINODERMATA PLATYHELMINTHES PORIFERA MOLLUSCA SOLUTION :porifera

Discussion

20936.	Question : Animals devoid of respiratory, excretory and circulatory organs are(a) liverflukes(b) tapeworms(c) threadworms(d) sponges
Answer» liverflukes tapeworms threadworms SPONGES

Discussion

20937.	Question : Animals cannot carry out gluconeogenesis as they do not possess
Answer» GLYCOLYSIS ENZYME Glycolate enzyme Glyoxylate enzyme LYSOSOME ANSWER :C

Discussion

20938.	Question : Animals active at night are called ………………. .
Answer» DIURNAL NOCTURNAL PARASITES nocto-diurnal SOLUTION :nocturnal

Discussion

20939.	Question : Animal vectors are required for pollination in
Answer» VALLISNERIA MULBERRY cucumber maize ANSWER :C

Discussion

20940.	Question : Animal requiring minimum amount of water to produce urine are
Answer» ureotelic ammonotelic uricotelic chemotelic SOLUTION : uricotelic

Discussion

20941.	Question : Animal husbandry is the science of rearing, feeding and caring,breeding and disease control of animals. It ensures supplyof proper nutrition to our growingpopulation through activities like increased production and improvement of animal products like milk, eggs, meat, honey, etc. a. Poultry production depends upon the photo period. Discuss
Answer» Solution :(a) Light has three important FUNCTIONS in poultry farming 1. Facilities sight of birds. 2. Stimulate internal cycles due to day-length changes. 3. Initiate hormone release. Light can influence the growth, development and production of chickens. Light colour: Blue light has a CALMING effect on chickens. Blue greenlight is said to stimulate growth. Orange red light STIMULATES reproduction. Duration: New born chicks need 21-23 hours of continuous light for few days (3-4days). It should be reducedto 15-16hours bythetimethechicks are about 3 weeks old following which 10-12 hours / Natural day light length would suffice for growth & development. Intensity: The intensity of light is alsolinkedto temperature. The lamps/lights givinglight witha cooling effect is preferred over lamps which generate lot of heat. Thus PHOTOPERIOD(lengthof exposure tolight) has a impact ongrowth of chicks alongwith light colour and intensity of the incident light.

Discussion

20942.	Question : Animal husbandry is the science of rearing, feeding and caring,breeding and disease control of animals. It ensures supplyof proper nutrition to our growingpopulation through activities like increased production and improvement of animal products like milk, eggs, meat, honey, etc. b. Polyculture of fishes is of great importance.
Answer» Solution :(b)Composite fish farming : Few selected fishes belonging to DIFFERENT species are stocked together in proper proportion in pond this mixed farming is termed composite fish farming or POLYCULTURE. The advantages INCLUDE, 1. All available niches are fully utilized. 2. Compatible species do not harm each other. 3. No competition among different species is fond. 4. Catla catla, labeo ROHITA and Cirrhinus mrigala (surface feeder) are the commonly used fish species for composite fish farming.

Discussion

20943.	Question : Animal characters in Euglena are
Answer» PRESENCE of PELLICLE which is MADE up of proteins and not of cellulose presence of photosenstitive STRUCTURES and contractile vacuole presence of longitudinal binary fission all of the above ANSWER :D

Discussion

20944.	Question : Angular collenchyma is found in
Answer» SOLANUM CUCURBITA Lactuca 1 and 2 Answer :D

Discussion

20945.	Question : Angiotensin II stimulates adrenal cortex to release hormone________.
Answer» ANSWER :ALDOSTERONE

Discussion

20946.	Question : Angiotensinogen issecreted by
Answer» Juxtaglomerular (JG) CELLS Macula DENSA cells ENDOTHELIAL cells of blood VESSELS Liver cells Solution :Liver cells

Discussion

20947.	Question : Angiosperms : Roots : Rhodophyta : : ………….
Answer» ANSWER :HOLDFAST

Discussion

20948.	Question :Angiotensin Converting Enzyme inhibitors (ACE inhibitors) are used to treat high blood pressure. Using a flow chart, explain why these drugs are helpful in treating hypertension.
Answer» Solution : Angiotensin CONVERTING Enzyme inhibitors (ACE inhibitors) PREVENT the conversion of angiotensinogen into angiotensen I and angiotensen 1 into angiotensen II. This decreases the reabsorption of sodium by PROXIMAL convoluted TUBULE and secretion of aldosterones, This prevents the increased secretion of potassium. All these reactions help in treating hypertension.

Discussion

20949.	Question : Angiosperms have dominated the land flora primarily because of their
Answer» DOMESTICATION by man nature of SELF pollination power of adaptability in DIVERSE habitat property of producing large number of seeds

Discussion

20950.	Question : Angiosperms : Flowers : : Conifers : ……………
Answer» ANSWER :CONES

Discussion

Explore topic-wise InterviewSolutions in .

Question : Answer briefly How does pepsinogen change into its active form?

Question : Answer briefly What are the basic layers of wall of alimentary canal?

Question : Answer briefly : How do you perceive the colour of an object?

Question : Answer briefly : (b) Which part of our body helps us in maintaining the body balance ?

Question : Answer briefly : (c) How does the eye regulate the amount of light that falls on the retina ?

Question : Do you think shape of chloroplast is unique for algae. Justify your answer.

Question : ANS stands for……………………………………………..

Question : An oval depression called fossa ovalis, is seen on

Question : Another name given to 'Halophiles' is ________.

Question : Another name for cartilage cells.

Question : Another name for collar bone is

Question : Select the correct biological term. Cardiac muscle, atria, tricuspid valve, systole, auricles, arteries, diastole, ventricles, bicuspid valve, pulmonary artery, cardiac cycle, semi lunar valve, veins, pulmonary vein, capillaries, vena cava, aorta.Another name for atria.

Question : Another name for 'blue green' bacteria.

Question : Anomalous secondary growth in monocots is seen in

Question : Anomalous secondary growth found in dicot root of

Question : Annual rings are the number of:

Question : Annual rings are distinct in plants growing in

Question : Annual ring is

Question : Annelida have a true body cavity.

Question : Annelida is characterised

Question : Ankle joint is: .............

Question : Anisotropic band are made up of ........

Question : Animals without coelom are known as ……….

Question : Animals with longest life span are

Question : Animals which live on the floor of sea are called benthic.

Question : Animals which excrete urea produced during metabolism of amino acids is (a) ureotelism(b) uricotelism(c) ammonotelism(d) aminotelism

Question : Animals undergoing inactive stage during winter is known as(a) aestivation(b) hibernation(c) adaptation(d) acclimatization

Question : Animals that have three layers of embryonic tissue buthave organs in a cavity that is not completely lined with mesoderm are :

Question :Animals that have three layers of embryonic tissue andhave one solid mass of tissue rather than tissues and organs nestled inside a body cavity are :

Question : Animals that excrete ammonia are called .........

Question : Animals that do not possess a backbone are called ……….

Question : Animals possess nerve or nervous systems to respond to their environment. But the single celled amoeba does not possesses any nerve cell , so, how it come to know whether a particle it encounters is a grain of sand and not its dinner by /

Question : Animals having pseudocoelomate and triploblastic nature are present in phyla ……………….. .

Question : Animals giving bith to young ones:

Question : Animals devoid of respiratory, excretory and circulatory organs belong to phylum ………………….. .

Question : Animals devoid of respiratory, excretory and circulatory organs are(a) liverflukes(b) tapeworms(c) threadworms(d) sponges

Question : Animals cannot carry out gluconeogenesis as they do not possess

Question : Animals active at night are called ………………. .

Question : Animal vectors are required for pollination in

Question : Animal requiring minimum amount of water to produce urine are

Question : Animal characters in Euglena are

Question : Angular collenchyma is found in

Question : Angiotensin II stimulates adrenal cortex to release hormone________.

Question : Angiotensinogen issecreted by

Question : Angiosperms : Roots : Rhodophyta : : ………….

Question :Angiotensin Converting Enzyme inhibitors (ACE inhibitors) are used to treat high blood pressure. Using a flow chart, explain why these drugs are helpful in treating hypertension.

Question : Angiosperms have dominated the land flora primarily because of their

Question : Angiosperms : Flowers : : Conifers : ……………