24277 + Interview Questions in Biology in Class 12 Page 169 InterviewSolution

8401.	Question : Seminal plasma in human males in rich in :-
Answer» RIBOSE and potassium Fructose and calcium Glucose and calcium DNA and testosterone Answer :B

Discussion

8402.	Question : Seminal plasma in human males is rich infructose and calciumglucose and calciumDNA and testosteroneribose and potassium
Answer» FRUCTOSE and calcium glucose and calcium DNA and testosterone ribose and potassium Answer :A

Discussion

8403.	Question : Semiconservative mode on replication of DNA was proved by :
Answer» HERSHEY and chase Griffth Watson and crick Meselson and stahl Answer :D

Discussion

8404.	Question : Semicircular canals in vertebrate are responsible for :-
Answer» DETECTION of change in atmospheric pressure. Orientation of animal with REGARD to sun Maintenance of BALANCE when ORGANISM is in motion. Regulation of speed of animal. Answer :C

Discussion

8405.	Question : Semicircular canal in the internal ear is the feature of
Answer» HERDMANIA Lancelet Myxine Sea squirt Answer :C

Discussion

8406.	Question : Semi-dwarf varieties of a corp plane were derived from IR-8. Name that corp.
Answer» SOLUTION :PADDY CROP(RICE)

Discussion

8407.	Question : Semi-dwarf rice varieties were derived from :-
Answer» IR-8 and TN-1 Jaya and Ratna Sonalika and KALYAN sona Both (1) and (2) ANSWER :A

Discussion

8408.	Question : Semi-conservative replication of DNA .
Answer» SOLUTION :

Discussion

8409.	Question : Semiconservative DNA replication was first demonstrated by
Answer» HERSHEY and Chase Griffith MESELSON and STAHL Macleod and McCarty Solution :Meselson and Stahl

Discussion

8410.	Question : Semi-autonomous nature of mitochondria is due presence of
Answer» 70S ribosome DS DNA Cardiolipin Both (1) & (2) Answer :D

Discussion

8411.	Question : Self-pollination occur between stamens and carpels of(A) same flower(B) different flower(C) same flower or different flower of same plant(D) different flowers of same plant
Answer» same FLOWER DIFFERENT flower same flower or different flower of same plant different FLOWERS of same plant Answer :C

Discussion

8412.	Question : Self sterility caused by multiple alleles has been reported in _____
Answer» PEA DROSOPHILA MAIZE NICOTIANA ANSWER :D

Discussion

8413.	Question : Semen is composed of
Answer» Sperm and secretion from SEMINAL VESICLE Sperm, secretion of seminal vesicle, PROSTATE gland and COWPER's gland Sperm and secretion fron Cowper' s gland None of these Answer :B

Discussion

8414.	Question : Self-pollination means :
Answer» Occurrence of male and female sex organs in the same flower Germination of pollen within the same ANTHER Transference of POLLENS from anther to STIGMA within the same flower Transference of pollen from one plant to the stigma of a NEIGHBOURING plant Answer :C

Discussion

8415.	Question : Self pollination is prevented by(A) Dichogamy(B) self sterility(C) herkogamy(D) all the above
Answer» Dichogamy self sterility hekrogamy all the above Answer :D

Discussion

8416.	Question : Self-incompatibility in tobacco is an example of
Answer» Plaeiotropic gene Complementary genes Multple. Allelism Epistasis Answer :C

Discussion

8417.	Question : Self-ligation is prevented by .......................
Answer» DNA POLYMERASE HELICASE ALKALINE phosphate DNA lipase Answer :C

Discussion

8418.	Question : Selection of lysine auxotroph (bacteria which requires lysine for growth) from a mixed population of bacteria can be done by growing the bacterial population in the presence of -
Answer» lysine penicillin lysine and penicillin glucose Answer :D

Discussion

8419.	Question : Selected the correct option
Answer» GENES are located on DNA and protein Gene is the FUNCTIONALUNIT of inheritance A segment of DNA coding for a POLYPEPTIDE is called a cistron Both (2) and (3) Answer :D

Discussion

8420.	Question : Select wrong statement with respect to multiple alleles -
Answer» It can be detected only in a population They are mutant forms of the same gene. Number of phenotypes in MULTIPLE alleles is CALCULATED by formula 2N + 1. They OCCUPY same locus on HOMOLOGOUS chromosomes. Answer :C

Discussion

8421.	Question : Selected the correct match of digested products in humans given in column I with their absorption site and mechanism in coloumn II
Answer» Disaccharidase LIKE maltse `rarr` lipases `rarr` NUCLEASES Salivary AMYLASE`rarr`pancreatic amylase `rarr` disaccharidases Salivary MALTASE`rarr` carboxypeptidase `rarr` trysinogen pancreatic amylase`rarr` salivary amylase `rarr` lipases Answer :B

Discussion

8422.	Question : Select wrong statement about heart wood:
Answer» It is made up of DEAD elements It does not conduct water It gives mechanical SUPPORT to the stem It is involved in the conduction of water and MINERALS from root to leaf Answer :D

Discussion

8423.	Question : Select which is not true of intestinal villi among these.
Answer» They possess microvilli They increase the surface area They are SUPPLIED with CAPILLARIES and the lacteal vessels They only PARTICIPATE in DIGESTION of fats Answer :D

Discussion

8424.	Question : Select true statements - (A) Phloem fibres are generally absent in the primary phloem. (B) Root hairs help in absorption of water and minerals from the soil (c ) Trichome help in preventing water loss due to transpiration.
Answer» Only A and B Only B and C Only A and C All A, B and C Answer :D

Discussion

8425.	Question : Select true statements - (A) Jute, flax and hemp are commercial fibres (B) Cuticle is absent in roots (C) The trichomes in the shoot system are usually multicellular.
Answer» Only B and C Only A and C Only A and B All A, B and C Answer :D

Discussion

8426.	Question : Select true statements - (A) Bast fibres are made up of sclerenchymatous cells. (B) The companion cells help in maintaining the pressure gradient in the sieve tubes. (C) Phloem parenchyma is absent in Zea mays stem
Answer» Only A and B Only B & C Only C All A, B, and C Answer :D

Discussion

8427.	Question : Select true statement - (A) The presence of vessels in xylem is a characteristics feature of angiosperms (B) The cells of parenchyma are generally isodiametric (C) Xylem vessels are multicellular whereas tracheids are unicellular
Answer» Only A Only B and C Only B All A, B and C Answer :D

Discussion

8428.	Question : Select the wrongly matched pair
Answer» ACETYL COA - Gibberellins Succinyl CoA - Chlorophyll alpha'-ketoglutaric ACID - AMINO acid Oxaloacetic acid Answer :D

Discussion

8429.	Question : Select the wrong statements about the collenchyma:
Answer» The collenchyma occurs in layers below the epidermis in dicotyledonous stem It is ALWAYS found continuous HOMOGENOUS layers Theses can assimilate FOOD when they CONTAIN chloroplasts Intercellular spaces are generally absent Answer :B

Discussion

8430.	Question : Select the wrong statements about parenchyma:
Answer» It forms the major component within organs The CELLS of the parenchyma are generally non-isodiametric Its cell walls are THIN made up of cellulose The parenchyma performs various FUNCTIONS like photosynthesis, STORAGE and secretion Answer :B

Discussion

8431.	Question : Select the wrongly matched option.
Answer» (1) Nitrobacter - Chemoautotrph (2) Anabaena - Autotroph (3) RHODOSPIRILLUM - SYMBIOTIC N2 -fixer (4) RHIZOBIUM - Heterotroph Answer :B

Discussion

8432.	Question : Select the wrong statements:-
Answer» In Oomycetes, female gamete is smaller and motile, while MALE gamete is larger and non- motile. Chlamydomonas EXHIBITS both isogamy and anisogamy and Fucus SHOWS oogamy. Isogametes are similar in structure, function and behaviour. Anisogametes differ either in structure, function or behaviour. Answer :C

Discussion

8433.	Question : Select the wrong statement with respect to glycolysis
Answer» It occurs OUTSIDE mitochondira It is an anaerobic PHASE Glucose undergoes PARTIAL oxidation to form 2 MOLECULESOF pyruvic acid Glucose is phosphorylated to glucose-6-phosphate by isomerase enzyme Answer :D

Discussion

8434.	Question : Select the wrong statement (s) regarding cross pollination (a) Pollination depends on external agent and so it is certain. (b) New varieties are produced. (c) Continuous cross pollination leads to weaker progeny. (d) Germination capacity is highly declined.
Answer» a and d B and C a,b and d a , c and d ANSWER :D

Discussion

8435.	Question : Select the wrong statement.
Answer» ISOGAMETES are similar in structure,function and behaviour Anisogametes DIFFER either in structure, function and behaviour In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy Solution :(c) Statement(c) is wrong as oomycetesinclude water MOULDS, WHITE rusts and downy mildews. In these, female gamete is large and non-motile, whereas, male gamete is small and non-motile, Isogametes are found in algae like Ulothrix,Chlamydomonas,SPIROGYRA, etc.which are similar in structure, function and behaviour. Anisogametes are found in Chalamydomonas in which one gamete is larger and non-motile and the other one is motile and smaller.Oogamy is the fusion of non-motile egg with motile sperm.The gametes, differ both morphologically as well as physiologically.It occurs in Chlamydomonas, Fucus, Chara, Volvox, etc.

Discussion

8436.	Question : Select the wrong statement:
Answer» MOSAIC disease in tobaccoand AIDS in human beingare causedby virsuses The viroudsweredisocvered by D.J lvanowski W.M Stanley showedthatviruses COULD by crystallized THETERM contagium vivum fluidum was coined by M.W. Beijerinek Answer :B

Discussion

8437.	Question : Select the wrong pair.
Answer» HALDANE - HOT DILUTE soup Oparin - Protobiont Fox - Coacervates Spallanzani - Abiogenesis Answer :D

Discussion

8438.	Question : Select the wrong staement :-
Answer» BACTERIAL CELL wall is made up of peptidoglycan Pili and fimbriae are mainly involved in MOTILITY of bacterial cells Cyanobacteria LACK flagellated cells Mycoplasma is a wall-less microorganism Answer :B

Discussion

8439.	Question : Select the type of parthenogenesis in which diploid unfertilised eggs forms only females.
Answer» Arrhenotoky Thelytoky Amphitoky Epitoky Answer :C

Discussion

8440.	Question : Select the type of enzyme involved in the following reaction: S-G+S^,-----> S+S^'-G
Answer» Dehydrogenase Transferase Hydrolase Lyase Answer :B

Discussion

8441.	Question : Select the two correct statements out of the four (I-1V) given below about Lac operon. I. Glucose or galactose may bind with the repressor and inactivate it. II. in the absence of lactose the repressor binds with the operator region III. The z-gene codes for region IV. This was elucidated by Francois Jacob and Jacques Monad The correct statement are:
Answer» II and III I and III II and IV I and II Answer :C

Discussion

8442.	Question : Select the true statements from the following regarding insulin – (A) Insulin from animal source, may develop allergy in some patients (B) Recombinant insulin do not induce unwanted immunological response (C) C - peptide is not present in mature insulin (D) Insulin can be administered orally to diabetic patients.
Answer» A and C only A and B only A, B and C only B, C and D only Answer :C

Discussion

8443.	Question : Select the true statement -
Answer» In fishes KIDNEY PLAY a major role in AMMONIA excretion. Ammonia is 100,000 times less toxic than urea. Sharks retain a large amount of urea in the blood as a major osmolyte to balance the osmolarity of the body fluids Most terrestrial REPTILE EXCRETE ammonia Answer :C

Discussion

8444.	Question : Select the statementwhich is correctabout virolds.
Answer» They were DISCOVERED by Karashan in 1966 They range in size from 266-450 nucleotides The GENOME of viroids is LARGER thanviruses They show a LOT sequence homology Answer :D

Discussion

8445.	Question : Selectthestatementwhichexplains bestparasitism a. Oneorganism is benefitted b Boththe organimsare benefitted C. Oneorganismis benefitted otheris notaffected d. One organismis benefitte otheris affected .
Answer» SOLUTION :Oneorganism is BENEFITTED.

Discussion

8446.	Question : Select the statement which explains parasitism best.a) One organism is benefited .b)Both organism are benefited.c)One organism is benefited other is not affected.d)One organism is benefited, other is a harmfully affected.
Answer» ONE ORGANISM is BENEFITED Both organism are benefited One organism is benefited other is not affected One organism is benefited, other is a HARMFULLY affected. Answer :D

Discussion

8447.	Question : Select the statement which explains best parasitism.
Answer» ONE organism is BENEFITED. Both the ORGANISMS are benefited. One organism is benefited, other is not AFFECTED. One organism is benefited, other is affected. Answer :D

Discussion

8448.	Question : Select the statement which explains parasitism.
Answer» ONE ORGANISM is BENEFITED, other is not AFFECTED Both the ORGANISMS are benefited Both the organisms are affected One organism is benefited, other is affected. Answer :D

Discussion

8449.	Question : Select the sexually-transmitted disease:
Answer» Syphilis Hepatitis-B Genital herpes All of these Answer :C

Discussion

8450.	Question : select the set of parents that cannot produce child with blood group 'O'
Answer» `I^Ai × I^Ai` `I^Bi × I^AI^A` `II × I^Ai` `I^BI^B × I^AI^B Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : Seminal plasma in human males in rich in :-

Question : Seminal plasma in human males is rich infructose and calciumglucose and calciumDNA and testosteroneribose and potassium

Question : Semiconservative mode on replication of DNA was proved by :

Question : Semicircular canals in vertebrate are responsible for :-

Question : Semicircular canal in the internal ear is the feature of

Question : Semi-dwarf varieties of a corp plane were derived from IR-8. Name that corp.

Question : Semi-dwarf rice varieties were derived from :-

Question : Semi-conservative replication of DNA .

Question : Semiconservative DNA replication was first demonstrated by

Question : Semi-autonomous nature of mitochondria is due presence of

Question : Self-pollination occur between stamens and carpels of(A) same flower(B) different flower(C) same flower or different flower of same plant(D) different flowers of same plant

Question : Self sterility caused by multiple alleles has been reported in _____

Question : Semen is composed of

Question : Self-pollination means :

Question : Self pollination is prevented by(A) Dichogamy(B) self sterility(C) herkogamy(D) all the above

Question : Self-incompatibility in tobacco is an example of

Question : Self-ligation is prevented by .......................

Question : Selection of lysine auxotroph (bacteria which requires lysine for growth) from a mixed population of bacteria can be done by growing the bacterial population in the presence of -

Question : Selected the correct option

Question : Select wrong statement with respect to multiple alleles -

Question : Selected the correct match of digested products in humans given in column I with their absorption site and mechanism in coloumn II

Question : Select wrong statement about heart wood:

Question : Select which is not true of intestinal villi among these.

Question : Select true statements - (A) Phloem fibres are generally absent in the primary phloem. (B) Root hairs help in absorption of water and minerals from the soil (c ) Trichome help in preventing water loss due to transpiration.

Question : Select true statements - (A) Jute, flax and hemp are commercial fibres (B) Cuticle is absent in roots (C) The trichomes in the shoot system are usually multicellular.

Question : Select true statements - (A) Bast fibres are made up of sclerenchymatous cells. (B) The companion cells help in maintaining the pressure gradient in the sieve tubes. (C) Phloem parenchyma is absent in Zea mays stem

Question : Select true statement - (A) The presence of vessels in xylem is a characteristics feature of angiosperms (B) The cells of parenchyma are generally isodiametric (C) Xylem vessels are multicellular whereas tracheids are unicellular

Question : Select the wrongly matched pair

Question : Select the wrong statements about the collenchyma:

Question : Select the wrong statements about parenchyma:

Question : Select the wrongly matched option.

Question : Select the wrong statements:-

Question : Select the wrong statement with respect to glycolysis

Question : Select the wrong statement (s) regarding cross pollination (a) Pollination depends on external agent and so it is certain. (b) New varieties are produced. (c) Continuous cross pollination leads to weaker progeny. (d) Germination capacity is highly declined.

Question : Select the wrong statement.

Question : Select the wrong statement:

Question : Select the wrong pair.

Question : Select the wrong staement :-

Question : Select the type of parthenogenesis in which diploid unfertilised eggs forms only females.

Question : Select the type of enzyme involved in the following reaction: S-G+S^,-----> S+S^'-G

Question : Select the true statement -

Question : Select the statementwhich is correctabout virolds.

Question : Selectthestatementwhichexplains bestparasitism a. Oneorganism is benefitted b Boththe organimsare benefitted C. Oneorganismis benefitted otheris notaffected d. One organismis benefitte otheris affected .

Question : Select the statement which explains parasitism best.a) One organism is benefited .b)Both organism are benefited.c)One organism is benefited other is not affected.d)One organism is benefited, other is a harmfully affected.

Question : Select the statement which explains best parasitism.

Question : Select the statement which explains parasitism.

Question : Select the sexually-transmitted disease:

Question : select the set of parents that cannot produce child with blood group 'O'