24277 + Interview Questions in Biology in Class 12 Page 388 InterviewSolution

19351.	Question : Cohesion among water, adhesion, capillarity all help in
Answer» Apoplastic movement from root HAIR to root xylem Symplastic movement from root hair to root xylem Ascent of sap in PHLOEM elements DUE to root pressure Translocation of organic solutes in phloem Answer :A

Discussion

19352.	Question : Cogtrolled breeding experiments in animals are carried out by artificial insemination a. How is this done? b. Explain the merits of this method.
Answer» Solution :a. The semen is COLLECTED from the male that is chosen as a parent and injected into the REPRODUCTIVE TRACT of the selected female by the breeder. b. The merits are that the semen may be used IMMEDIATELY or can be frozen and used at a later date. It can also be transported in a frozen form to where the female is housed.

Discussion

19353.	Question : Coffee plant has chromosome number of 22 in its somatic cells . What is the chromosome number in the edible part of coffee seed ?
Answer» 22 33 44 11 Answer :B

Discussion

19354.	Question : Coffee and tea are :
Answer» FERMENTED bevrages Alcoholic beverages Distilled beverages Non-alcoholic beverages Answer :D

Discussion

19355.	Question : Coenobium is the colony of:-
Answer» Volvox Spirogyra Ulothrix Acetabularia Answer :A

Discussion

19356.	Question : Coenozoic era is age of reptiles.
Answer» ANSWER :MESOZOIC

Discussion

19357.	Question : Coenobium is the colony of :
Answer» Volvox Spirogyra ULOTHRIX Acetabularia Answer :A

Discussion

19358.	Question : Coelomic fluid is present between the layers of
Answer» TUNICA vaginalis Tunica vaculosa Tunica albuginea Tunica externa Answer :A

Discussion

19359.	Question : Coelom of hemichordates is
Answer» Schizocoel Enterocoel Enterocoel with DIFFERENTIATION of THREE regions Absent Answer :C

Discussion

19360.	Question : Coelom is lined by :-
Answer» Ectoderm Mesoderm Endoderm Mesogloea Answer :B

Discussion

19361.	Question : Coelacanth was caught in 1938 in South Africa. Why is it very significant in the evolutionary history of vertebrates?
Answer» Solution : LATIMERIA (COELACANTH) is a living fossil. Latimeria is believed to be the oldest amongst living fishes. It is a CONNECTING Link between fishes and AMPHIBIANS

Discussion

19362.	Question : Coelacanth is considered a connecting link between
Answer» AMPHIBIANS and reptiles Fish and amphibians Chordate and NON- chordate Birds and mammals Answer :B

Discussion

19363.	Question : Codons that specify same amino acids are called
Answer» SYNONYMS autonyms synergestic ANTAGONISTIC ANSWER :A

Discussion

19364.	Question : Codon AUG has dual function - Justify.
Answer» Solution :CODON AUG has DUAL function (i) CODES for Methionine (II) it act as INITIATOR codon

Discussion

19365.	Question : Codon - anticodon interactions occur by
Answer» COVALENT bond ELECTROSTATIC interactions Hydrogen BONDS Hydrophobic interaction Answer :C

Discussion

19366.	Question : Codominance is depicted by
Answer» B BLOOD group AB blood group O blood group A blood group Answer :B

Discussion

19367.	Question : Codominance is shown by the alleles of
Answer» `I^A i` `I^B i` `I^A I^B` ii Answer :C

Discussion

19368.	Question : Coding sequences found in split genes are called.
Answer» Operons Introns EXONS Cistron Solution :Exons

Discussion

19369.	Question : COD stands for controlled oxygen demand.
Answer» ANSWER :A::C::D

Discussion

19370.	Question : Codes on mRNAs for proteins are
Answer» zig-zag coplaner colinear none of these Answer :C

Discussion

19371.	Question : Coconut seed is an endospermous seed . In tender stage it has liquid endosperm . But when the embryo becomes completely matured there is only solid endosperm. (a) What is the function of endosperm? (b) Write the functional difference between liquid and solid endosperm .
Answer» Solution :(a ) ENDOSPERM is a nutritive tissue . It PROVIDES nourishment to the developing embryo. In angiosperms endosperm is triploid and is formed after fertilization . (B) In coconut two forms of ENDOSPERMS are present . In the beginning the endosperm is in liquid state and in later STAGE it is in solid state . Liquid endosperm provides food for the development of zygote into embryo . solid endosperm provides food to the fully developed embryo for its future development .

Discussion

19372.	Question : Coconut plant is monoecious while date palm is dioecious. Why are they called so?
Answer» Solution :Coconut plant bears UNISEXUAL MALE and female flowers on the same plant so is CALLED as monoecious. Male flower is called as STAMINATE flower and female flower is called as pistilate flower. While date palm bears unisexual male and female flowers on the DIFFERENT plant and is called as dioecious.

Discussion

19373.	Question : Coconut is an albmunious seed why ?
Answer» Solution :(a) NUCLEAR Endosperm (B) Helobial Endosperm (C) CELLULAR Endosperm (d) Ruminate Endosperm

Discussion

19374.	Question : Coconut is a fruit of which type ?
Answer» Berry Nut Capsule Drupe Answer :D

Discussion

19375.	Question : Cocktail therapy' is given for?
Answer» AIDS CANCER Dengue Malaria Answer :A

Discussion

19376.	Question : CockroachhasnoRBCs orhaemoglobinbecause
Answer» cockroach does notrespire cockroachis invertebrate its blooddoesnot TRANSPORT ` O _ 2AND CO_ 2 `and tissueshavedirectexchange ofgasesfrom AIR cockroachrespiresanaerobically. Answer :C

Discussion

19377.	Question : Cockroach has ........ kind of mouth parts
Answer» LAPPING and sponging Chewing and BITING type Piercing and suking type Chewing and sucking Answer :B

Discussion

19378.	Question : Cockroach exhibits
Answer» Holometabolus development Ametabolous development Paurometabolous development Hypermetabolous development Answer :C

Discussion

19379.	Question :Cochlea lodges
Answer» Helicotrema MEIBOMIAN GLAND ORGAN of Corti Fenestra rotundus. ANSWER :C

Discussion

19380.	Question : Cochlea is a part of
Answer» EYE internal ear MIDDLE ear pectoral girdle WAAROM ANSWER :B

Discussion

19381.	Question : Cochineal insects have been employed in checking overgrowth of:
Answer» Cacti Eichhornia Weeds Scale insects Answer :A

Discussion

19382.	Question : Cocaine has a potent stimulating action on the central nervous system and it produces
Answer» EUPHORIA and INCREASED ENERGY levels Analgesic action Sedative action Sleep Answer :A

Discussion

19383.	Question : Coccidiosis in poultry is caused by
Answer» PROTOZOANS PARASITE NEMATODE parasite VIRUS TAPE worms Answer :A

Discussion

19384.	Question : Cocaine is a ….potent
Answer» Sedative Hallucinogen Pain reliever Neurotransmitter Answer :A::B::C::D

Discussion

19385.	Question : Cocaine, an alkaloid is obtained from the leaves of
Answer» Erythroxylon coca Ephedra SP. [Manipall Digitalis purpurea Papaver somnferum Answer :A

Discussion

19386.	Question : Cocaine alkaloid is obtained from_____ plant.
Answer» Marijuana Papaver somniferum Cannabis sativa Coca Answer :D

Discussion

19387.	Question :Coca alkaloid or cocaine is obtained from:
Answer» PAPAVER somniferum ATROPA BELLADONA Erythroxylum COCA Datura Answer :C

Discussion

19388.	Question : Coacervates divide by the process of
Answer» SPORE FORMATION BINARY FISSION Budding None of the above Answer :C

Discussion

19389.	Question : Coagulation of blood is an important mechanism. Explain its mechanism. What will happen if a person's blood is deficient in Ca+ ions?
Answer» Solution :(1) For the ANSWER of coagulation of blood ref ER to the above question. (2) Calcium ions are responsible for the conversion of inactive prothrombin into active thrombin by the enzyme PROTHROMBINASE. If the blood is deficient in Ca + ions, the coagulation reactions of the blood will not take PLACE properly. This can RESULT in excessive bleeding.

Discussion

19390.	Question : Coacervates were
Answer» MEMBRANE BOUND sphares containing proteinoids Colloidal aggregrates of CARBOHYDRATE and proteins Colloidal aggregrate of CARBOHYDRATES only Both (1) and (2) Answer :B

Discussion

19391.	Question : Coacervates containing nucleoprotein and surrounded by several nutritive substances and covered by a surface membrane represents
Answer» PROTOCELLS LIPOSOME Pre-Cells Microphere ANSWER :A

Discussion

19392.	Question : Coacervates belong to category of :
Answer» CYANOBACTERIA Protozoans MOLECULAR AGGREGATES Molecular aggregates surrounded by lipid membrane Solution :Molecular aggregates surrounded by lipid membrane

Discussion

19393.	Question : Coacervates are
Answer» COLLOIDAL droplets contain nucleoprotein a+b protobiont Answer :C

Discussion

19394.	Question : Coacervate
Answer» SOLUTION :It is an aggregate of macromolecules such as proteins, lipids and nucleic acids, thatform a STABLE colloid UNIT with properties that RESEMBLE living MATTER.

Discussion

19395.	Question : CO_2,CH_4 ,N_2O,CFC_S are called green house gases because they can absorb :
Answer» UV radiation Long WAVE infra-red radiation Visible LIGHT radiation Y-radiation Answer :B

Discussion

19396.	Question : CO_(2) is not released during
Answer» ALCOHOLIC fermentation Lactate fermentation Aerobic RESPIRATION in animals Aerobic respiration in plants Answer :B

Discussion

19397.	Question : Maximum amount of CO_2 transport occurs as.
Answer» SODIUM bicarbonate Sodium carbonate Potassium carbonate Magnesium carbonate Answer :A

Discussion

19398.	Question : CO_(2)+H_(2)O hArr H_(2)CO_(3) In the absence of an enzyme, the above reaction is :
Answer» Very slow and about 2000 MOLECULES of product are formed PER minute Very slow and about 200 molecules of products are formed per minute Very slow and about 200 molecules of products are formed per hour Very FAST, and about 6,00,000 molecules of products are formed per second. Answer :C

Discussion

19399.	Question : CO_(2) diffuses only from tissue to alveoli and not in reverse direction. Reason: CO_(2) is 10 times more soluble thanO_(2)
Answer» Both A and R are true and R is the correct explanation of A. Both A and R are true but R is not correct explanation of A A is true but R is false A and R are false Answer :C

Discussion

19400.	Question : CO_2dissociates from carbamino-haemoglobin when
Answer» `pCO_2 ` is high and `pO_2` is LOW `pO_2` is high and `pCO_2` is low `pCO_2 ` and `pO_2` are EQUAL NONE of these Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Cohesion among water, adhesion, capillarity all help in

Question : Cogtrolled breeding experiments in animals are carried out by artificial insemination a. How is this done? b. Explain the merits of this method.

Question : Coffee plant has chromosome number of 22 in its somatic cells . What is the chromosome number in the edible part of coffee seed ?

Question : Coffee and tea are :

Question : Coenobium is the colony of:-

Question : Coenozoic era is age of reptiles.

Question : Coenobium is the colony of :

Question : Coelomic fluid is present between the layers of

Question : Coelom of hemichordates is

Question : Coelom is lined by :-

Question : Coelacanth was caught in 1938 in South Africa. Why is it very significant in the evolutionary history of vertebrates?

Question : Coelacanth is considered a connecting link between

Question : Codons that specify same amino acids are called

Question : Codon AUG has dual function - Justify.

Question : Codon - anticodon interactions occur by

Question : Codominance is depicted by

Question : Codominance is shown by the alleles of

Question : Coding sequences found in split genes are called.

Question : COD stands for controlled oxygen demand.

Question : Codes on mRNAs for proteins are

Question : Coconut seed is an endospermous seed . In tender stage it has liquid endosperm . But when the embryo becomes completely matured there is only solid endosperm. (a) What is the function of endosperm? (b) Write the functional difference between liquid and solid endosperm .

Question : Coconut plant is monoecious while date palm is dioecious. Why are they called so?

Question : Coconut is an albmunious seed why ?

Question : Coconut is a fruit of which type ?

Question : Cocktail therapy' is given for?

Question : CockroachhasnoRBCs orhaemoglobinbecause

Question : Cockroach has ........ kind of mouth parts

Question : Cockroach exhibits

Question :Cochlea lodges

Question : Cochlea is a part of

Question : Cochineal insects have been employed in checking overgrowth of:

Question : Cocaine has a potent stimulating action on the central nervous system and it produces

Question : Coccidiosis in poultry is caused by

Question : Cocaine is a ….potent

Question : Cocaine, an alkaloid is obtained from the leaves of

Question : Cocaine alkaloid is obtained from_____ plant.

Question :Coca alkaloid or cocaine is obtained from:

Question : Coacervates divide by the process of

Question : Coagulation of blood is an important mechanism. Explain its mechanism. What will happen if a person's blood is deficient in Ca+ ions?

Question : Coacervates were

Question : Coacervates containing nucleoprotein and surrounded by several nutritive substances and covered by a surface membrane represents

Question : Coacervates belong to category of :

Question : Coacervates are

Question : Coacervate

Question : CO_2,CH_4 ,N_2O,CFC_S are called green house gases because they can absorb :

Question : CO_(2) is not released during

Question : Maximum amount of CO_2 transport occurs as.

Question : CO_(2)+H_(2)O hArr H_(2)CO_(3) In the absence of an enzyme, the above reaction is :

Question : CO_(2) diffuses only from tissue to alveoli and not in reverse direction. Reason: CO_(2) is 10 times more soluble thanO_(2)

Question : CO_2dissociates from carbamino-haemoglobin when