22339 + Interview Questions in Biology in Class 11 Page 418 InterviewSolution

20851.	Question :Antigen binding site of immunoglobulin is
Answer» VARIABLE REGION of HEAVY CHAIN variable region of LIGHT chain constant region of light chain variable region of both heavy and light chain Answer :D

Discussion

20852.	Question : Antigen and antibody complexes are removed from blood by
Answer» WBC with irregular lobed nucleus WBC with MULTI lobed nucleus WBC with bilobed nucleus WBC with reniform nucleus Answer :C

Discussion

20853.	Question : Antidiuretic hormone is produced from
Answer» kidney hypothalamus anterior PITUITARY posterior pituitary

Discussion

20854.	Question : Anticancerous alkaloids have recently been reported in
Answer» BARK of TAXUS baccata Shoot of Ephedra Seeds of PINUS excelsa Cortex of CYCAS stem Answer :A

Discussion

20855.	Question : Antibodies in our body are complex
Answer» Sterodis PROSTAGLANDINS GLYCOPROTEINS Lipoproteins Answer :C

Discussion

20856.	Question :Anthesis is a phenomenon which refers to
Answer» RECEPTION of pollen by stigma formation of pollen development of ANTHER OPENING of FLOWER bud Answer :D

Discussion

20857.	Question : Antheridial branch and archegonial branch are found in the same plant body of
Answer» HORNWORTS Sea weeds LIVERWORTS COTTON moss Answer :D

Discussion

20858.	Question : Antherozoids that are produced by bryophytes are
Answer» Non-flagellated Briflagellated Multiflagellated Multiciliated Solution :ANTHEROZOIDS that are PRODUCED by BRYOPHYTES are biflagellated.

Discussion

20859.	Question :Anthers are fused and stamens are free in family Compositae.
Answer» SOLUTION :DUE to SYNGENESIOUS TYPE of STAMENS

Discussion

20860.	Question : Antherozoids of moss are
Answer» SHORT, CURVED and biciliate Rod SHAPED, biciliate Short and multiciliate Long and multiciliate Answer :A

Discussion

20861.	Question : Antheraea mylitta feeds on ....
Answer» Mulberry ARJUN Castor Champa Solution :Arjun

Discussion

20862.	Question : Antheridia are__________shaped male organs while archegonia are__________shaped female organs in bryophytes.
Answer» SOLUTION :CLUB, FLASK

Discussion

20863.	Question : Anterior pituitary gland can also be called as neurohypophysis.
Answer» ANSWER :FALSE

Discussion

20864.	Question : Anterior pituitary and hypothalamus is connected through ………
Answer» Hepatic PORTAL VEIN RENAL portal vein Hypothalamo HYPOPHYSEAL axis All of these Answer :C

Discussion

20865.	Question : Anterior loops are _______pairs and present in ______ segments
Answer» 2 pairs in `7^(th), 8^(th)` segments 4 pairs in 7, 9, 12, 13 segments 3 pairs in 7, 9, 12, 13 segments 2 pairs in 10, 11 segments ANSWER :D

Discussion

20866.	Question : Anterior mouth, gills in operculum,2-chambered heart.
Answer» SOLUTION :OSTEICHTHYES

Discussion

20867.	Question : Anterior invagination is characteristic of
Answer» SARCODINES EUGLENOIDS Diatoms Dinoflagellates ANSWER :B

Discussion

20868.	Question : Answer true or false to the following : The left cerebral hemisphere : (a) receive most modalities of sensory information from the right side of the body. (b) is usually larger than the right. (c ) is the dominant cerebral hemisphere in most individuals. (d) is connected to the right by the corpus callosum. (e ) contians the main areas for the understanding and production of speech in most individuals.
Answer» SOLUTION :N//A

Discussion

20869.	Question : Antenna molecules refers to .
Answer» Lightharvestingcomplex CENTRAL corecomplex PS II Oxygenevolvingcomplex ANSWER :A

Discussion

20870.	Question : Draw a flow chart depicting the Bentham and Hooker Classification.
Answer» Solution :Lytic cycle: During lytic cycle of phage ,disintegration of host bacterial cell occurs and the progeny virions are released.The steps involved in the lytic cycle are as follows: (i) Adsorption : Phage (`T_(4)`) PARTICLES interact with cell WALL of host(E.coli).The phage tail makes contact between the two, and tail fibres recognize the specific receptor in phages.The on bacterial surface.The lipopolysaccharides of tail fibres act as receptor in phages.The process involving the recognition of phage to bacterium is called landing.Once the contact is and base plate to the cell surfaceThis step is called pinning. (ii) Penetration: The penetration process involves mechanical and enzymatic dogestion of the cell wall of the host.At the recognition site phage digests certain wall structure by viral enzyme(lysozyme).After pinning the tail sheath contracts(using ATP) and appears shorterand thicker.After contraction of the base plate enlarges through which DNA is injected into the cell wall without using metabolic energy.The step involving injection of DNA PARTICLE alone intothe bacterial cell is called Transfection.The empty protein coat leaving outside the cell is known as 'ghost'. (iii) Synthesis: This step involves the degradation of bacterial chromosome, protein synthesis and DNA replication. The phage nuclei acid takes over the host biosynthetic machinery. Host DNA gets inactivated and breaks down. Phage DNA suppresses the synthesis of bacterial protein and directs the metabolism of the cell to synthesis the proteins of the phage particlesand simultaneously replication of phage DNA ALSO takes place. Assembly and Maturation: The DNA of the phageand protein coat are synthesized separately and are assembled to form phage particles.The process of assembling the phage particles is known as maturation.After 20 minutes of infection about 300 new phages are assembled. (v) Release : The phage particle gets accumulated inside the host cell and are released by the lysis of the host cell wall.[OR]

Discussion

20871.	Question : Answer thequestions with references to anatomy of dicot stem: Why is the endodermis layer referred to as starch sheath?
Answer» SOLUTION :The CELLS of endodermis are rich in starch GRAINS hence this LAYER is also CALLED as the starch sheath.

Discussion

20872.	Question :Answer the questions in respect to areolar tissue : What is the function of this tissue?
Answer» SOLUTION :SERVES as a SUPPORT FRAMEWORK for EPITHELIUM

Discussion

20873.	Question : Answer thequestions with references to anatomy of dicot stem: Type of cells present in the Hypodermis.
Answer» SOLUTION :CELLS are collenchymatous in HYPODERMIS WITHOUT SPACES.

Discussion

20874.	Question : Answer thequestions with references to anatomy of dicot stem: Why are the vascular bundles present referred to as open and conjoint?
Answer» SOLUTION :PRESENCE of CAMBIUM having ability to form secondary xylem and phloem tissue so called as open vascular bundles.In conjoint type of vascular bundles the xylem and phloem are SITUATED at the same radius of vascular bundles.

Discussion

20875.	Question :Answer the questions in respect to areolar tissue : Where is areolar tissue present?
Answer» SOLUTION :BENEATH the SKIN

Discussion

20876.	Question :Answer the questions in respect to areolar tissue : Name any two cells it contains.
Answer» SOLUTION :FIBROBLASTS MACROPHAGES and MAST CELLS.

Discussion

20877.	Question : Answer thequestion in respect to approach : Write scientific name of cockroach.
Answer» SOLUTION :PERIPLANETA AMERICANA.

Discussion

20878.	Question : Answer thequestion in respect to approach : What is meant by paurometabolous?
Answer» SOLUTION :Metamorphosis to the adult STATE from the JUVENILE state gradually is CALLED as paurometabolous.

Discussion

20879.	Question : Answer thequestion in respect to approach : What is the function of gizzard and malpighian tubules?
Answer» SOLUTION : GIZZARD has chitinous Teeth so help in GRINDING of food. MALPIGHIAN tubules help in excretion of waste products OUTSIDE the body.

Discussion

20880.	Question : Answer the following: Which part of the human brain is the most developed ?
Answer» Solution :Cerebral CORTEX. It is thrown into number of folds and ridges called guri, SULCI and fissures. It INCREASES the total SURFACE area. It occupies 1/3 part of the BRAIN.

Discussion

20881.	Question : Answer the following with reference to the anatomy of dicotstem : (i) Where exactly are the cambial cells located in thevascular bundles? (ii)What is the name given to such a bundle ? (iii) How are the xylem vessels arranged ? (iv) What type of cells constitute the pith ?
Answer» Solution :(i)PRESENT between phloem and xylem in a vascular BUNDLE. (ii) Open vascular bundle. (iii) First formed primary xylem elements (protoxylem) lies TOWARDS the centre and the later formed primary xylem (metaxylem) lies towards the periphery of the organ (ENDARCH arrangement). (IV) Rounded parenchymatous cells with large intercellular spaces.

Discussion

20882.	Question : Answer the following: Which part of the ear determines the pitch of a sound?
Answer» SOLUTION :Pitch represents the PERCEIVED fundamental frequency of a sound. Pitch is a subjective sensation sound and is perceived by the temporal LOBE of the cerebral CORTEX. So it can be said that cerebral cortex perceives the pitch of the sound.

Discussion

20883.	Question : Answer the following: Which part of our central neural system acts as a Master Clock ?
Answer» Solution :Pineal GLAND is located in middle of cerebral hemisphere, beneath corpus callosum. It secretes melatonin hormone which is biological clock of human body. It CONTROLS wakefullness and sleep CENTRES, hunger, thirst ETC.

Discussion

20884.	Question : Answer the following : Which part of heart is resposible for initating and maintaining its rhythmic activity ?
Answer» Solution :SA NODE INITIATES RHYTHMIC mechanism of HEART and gets maintianed .

Discussion

20885.	Question : Answer the following : What is specific in the heart pf crocodilies among reptilians ?
Answer» SOLUTION :THEIS incompletedivisionof ventricleformedin reptiles . Crocodileis an EXEPTION in it .In whichventricleis completelydivided . It possess fourchambered HEART .

Discussion

20886.	Question : Answer the following questions in concern with TCA cycle. (a) Where does it takes place ? (b) When and by whom it was discovered ? (c ) Name the first formed product of the cycle. (d) How many ATP molecules are generated per cycle ? (e ) TCA cycle is a amphibolic pathway. Say yes or no. Why ?
Answer» Solution :(a) TCA CYCLE takes place in mitochondrion. (b) TCA cycle was discovered by Sir Hans Adolf KREBS in 1937. (C ) The first formed product of TCA cycle is citric acid or citrate. (d) Only one ATP molecule is generated per TCA cycle. (E ) Yes. TCA is an amphibolic pathway because it involves both anaerobic and CATABOLIC reactions.

Discussion

20887.	Question : Answer the following : Name the major site where RBCs are formed.
Answer» SOLUTION :THEORIGIN of RBC is in BONE - MARROW.

Discussion

20888.	Question : Answer the following in a few words Pacemaker for a human heart and its significance.
Answer» Solution :SA NODE INITIATION of heart beat WITHOUT nervous STIMULATION / regulation of heart beat.

Discussion

20889.	Question : Answer the following in a few words Normal blood pressure of human beings and its significance.
Answer» Solution :Normal blood pressure = 120/80 mm of HG HYPERTENSION (High blood pressure) = 140/90 mm of Hg and above. HYPOTENSION (LOW blood pressure) = 90/60 mm of Hg or lower.

Discussion

20890.	Question : Answer the following in a few words Significance of pulmonary circulation in man.
Answer» SOLUTION :PURIFICATION of BLOOD/ OXYGENATION of blood.

Discussion

20891.	Question : Answer the following in a few words Function of erythrocytes.
Answer» SOLUTION :Tranport OXYGEN from lungs to TISSUES. Transport CO_2 from tissues to lungs

Discussion

20892.	Question : Give reasons : Plants growing in well fertilized soils wilt if the soil is not watered.
Answer» Solution :The CONCENTRATION of WATER moleculesbeing less outside, the exosmosis takes PLACE, RESULTING in wilting of the plantsgrowing in HIGHLY fertilized soil.

Discussion

20893.	Question : Answer in one word or one line : Where do you find Malpighian tubules?
Answer» SOLUTION :At the JUNCTION of MIDGUT and HINDGUT

Discussion

20894.	Question : Answer in one word or one line : How many segments are present in the abdomen ofcockroach?
Answer» SOLUTION :TEN SEGMENTS

Discussion

20895.	Question : Answer in one word or one line : What is the position of ovaries in cockroach?
Answer» aa Solution :In cockroach , a pair of OVARIES LIES laterally in the 2nd - 6th ABDOMINAL segments

Discussion

20896.	Question : Answer briefly : How do you perceive the colour of an object ?
Answer» Solution :Cones are responsible for colour vision. They require brighter light to FUNCTION than rod cells. Three types of cone cells are present, they PERCEIVE (red, green and BLUE) colour. The colour seen is the combined EFFECT of stimuli to, and responses from, three types of cone cells. When these rod cells STIMULATED equally sensation for white light is produced.

Discussion

20897.	Question : Answer briefly Why are villi present in the intestine and not in the stomach?
Answer» Solution :Villi are PRESENT in the INTESTINE to increase surface AREA for ABSORPTION most of the DIGESTED food materials are absorbed in the intestine.here villi are found in the intestine.

Discussion

20898.	Question : Answer in one word or one line : Give the common name of Periplaneta americana.
Answer» SOLUTION :COCKROACH

Discussion

20899.	Question : Answer briefly : Which part of our body helps us in maintaining the body balance?
Answer» Solution :The VESTIBULAR apparatus including the crista and MACULA are the specific apparatus which are responsible for the MAINTENANCE of balance of the body and POSTURE.

Discussion

20900.	Question : Answer briefly How does bile help in the digestion of fats?
Answer» Solution :BILE helps in digestion by performing a PROCESS known as emulsification.Emulsification is a process by which fat is converted into TINY droplets LIPASE(fat digesting ENZYME)acts only on emulsified fat.

Discussion

Explore topic-wise InterviewSolutions in .

Question :Antigen binding site of immunoglobulin is

Question : Antigen and antibody complexes are removed from blood by

Question : Antidiuretic hormone is produced from

Question : Anticancerous alkaloids have recently been reported in

Question : Antibodies in our body are complex

Question :Anthesis is a phenomenon which refers to

Question : Antheridial branch and archegonial branch are found in the same plant body of

Question : Antherozoids that are produced by bryophytes are

Question :Anthers are fused and stamens are free in family Compositae.

Question : Antherozoids of moss are

Question : Antheraea mylitta feeds on ....

Question : Antheridia are__________shaped male organs while archegonia are__________shaped female organs in bryophytes.

Question : Anterior pituitary gland can also be called as neurohypophysis.

Question : Anterior pituitary and hypothalamus is connected through ………

Question : Anterior loops are _______pairs and present in ______ segments

Question : Anterior mouth, gills in operculum,2-chambered heart.

Question : Anterior invagination is characteristic of

Question : Antenna molecules refers to .

Question : Draw a flow chart depicting the Bentham and Hooker Classification.

Question : Answer thequestions with references to anatomy of dicot stem: Why is the endodermis layer referred to as starch sheath?

Question :Answer the questions in respect to areolar tissue : What is the function of this tissue?

Question : Answer thequestions with references to anatomy of dicot stem: Type of cells present in the Hypodermis.

Question : Answer thequestions with references to anatomy of dicot stem: Why are the vascular bundles present referred to as open and conjoint?

Question :Answer the questions in respect to areolar tissue : Where is areolar tissue present?

Question :Answer the questions in respect to areolar tissue : Name any two cells it contains.

Question : Answer thequestion in respect to approach : Write scientific name of cockroach.

Question : Answer thequestion in respect to approach : What is meant by paurometabolous?

Question : Answer thequestion in respect to approach : What is the function of gizzard and malpighian tubules?

Question : Answer the following: Which part of the human brain is the most developed ?

Question : Answer the following with reference to the anatomy of dicotstem : (i) Where exactly are the cambial cells located in thevascular bundles? (ii)What is the name given to such a bundle ? (iii) How are the xylem vessels arranged ? (iv) What type of cells constitute the pith ?

Question : Answer the following: Which part of the ear determines the pitch of a sound?

Question : Answer the following: Which part of our central neural system acts as a Master Clock ?

Question : Answer the following : Which part of heart is resposible for initating and maintaining its rhythmic activity ?

Question : Answer the following : What is specific in the heart pf crocodilies among reptilians ?

Question : Answer the following : Name the major site where RBCs are formed.

Question : Answer the following in a few words Pacemaker for a human heart and its significance.

Question : Answer the following in a few words Normal blood pressure of human beings and its significance.

Question : Answer the following in a few words Significance of pulmonary circulation in man.

Question : Answer the following in a few words Function of erythrocytes.

Question : Give reasons : Plants growing in well fertilized soils wilt if the soil is not watered.

Question : Answer in one word or one line : Where do you find Malpighian tubules?

Question : Answer in one word or one line : How many segments are present in the abdomen ofcockroach?

Question : Answer in one word or one line : What is the position of ovaries in cockroach?

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

Question : Answer briefly Why are villi present in the intestine and not in the stomach?

Question : Answer in one word or one line : Give the common name of Periplaneta americana.

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

Question : Answer briefly How does bile help in the digestion of fats?

Question : Antheridia areshaped male organs while archegonia areshaped female organs in bryophytes.

Question : Anterior loops are _pairs and present in segments