24277 + Interview Questions in Biology in Class 12 Page 247 InterviewSolution

12301.	Question : Myosin head separates from actin when :
Answer» ATP hydrolysis When ATP attached to MYOSIN head When ATP RELEASES from myosin head When ATP releases from Actin ANSWER :B

Discussion

12302.	Question : Myopia is an example of ………….. .
Answer» COMPLETE SEX linkage incomplete sex linkage recombination crosssing over Answer :A

Discussion

12303.	Question : Myoglobins are present in R.B.Cs.
Answer» ANSWER :HAEMOGLOBIN

Discussion

12304.	Question : Mydriasis is :-
Answer» CONTRACTION in SUSPENSORY ligament Decrease DIAMETER of pupil, DUE to contraction in radial dilatory muscles Increase diameter of pupil, due to contraction in circular SPHINCTER muscle Increase diameter of pupil, due to contraction in radial dilatory muscles Answer :D

Discussion

12305.	Question : Mycorrhizal hyphae prove useful to the plant by:
Answer» protecting them from microbial infection providing them ADDITIONAL support enhancing the WATER ABSORPTION and UPTAKE of minerals storing the minerals Answer :C

Discussion

12306.	Question : Mycorrhizae are symbiotic association between
Answer» FUNGI and fungi fungi and PLANT roots root and bacteria bacteria and fungi Answer :B

Discussion

12307.	Question : Mycorrhizae are more common in :
Answer» EUTROPHIC soil Oligotrophic soil Both of these NONE of these Answer :B

Discussion

12308.	Question : Mycorrhiza is used in
Answer» OBTAINING nutrients from SOIL SYNTHESIS of food Increasing soil FERTILITY Providing resistance against different regulators Solution :Increasing soil fertility

Discussion

12309.	Question : Mycorrhiza promotes plant growth by ……………………………
Answer» SERVING as a plant GROWTH regulators A bsorbing INORGANIC ions from soil Helping the plant in UTILIZING atmospheric nitrogen Protecting the plant from INFECTION Solution :Protecting the plant from infection

Discussion

12310.	Question : Mycorrhiza is symbiotic association betweenA) Algae and fungiB)Fungi and plant rootC)Bacteria and fungi
Answer» ALGAE and fungi Fungi and PLANT root fungi and plant root Bacteria and fungi Answer :B

Discussion

12311.	Question : Mycorrhiza is an assoication between :
Answer» Higher plant roots and GLOMUS ALGAE and FUNGI Protozoan and algae Leguminous roots and Rhizobium ANSWER :A

Discussion

12312.	Question : Mycorrhiza is an example of:
Answer» Decomposers Endoparasitism Symbiotic relationship Ectoparasitism Answer :C

Discussion

12313.	Question : Mycorrhiza establishes symbiosis between :
Answer» FUNGI and bryophtes Phaeophyceae and rhodophyceae Fungi and alagae None of the above Solution :Symbiosis is also ESTABLISHED by mycorrhiza ,but in this case symboisis is always established between FUNGUS and the roots of HIGHER plants.

Discussion

12314.	Question : Mycorrhiza is :-
Answer» Symbiotic association between green algae and ascomycetes. Symbiotic association between ROOTS of higher PLANTS and algae. Symbiotic association between fungi and roots of higher plants Symbiotic association between NOSTOC and roots of higher plants. Answer :C

Discussion

12315.	Question : Mycorrhiza is a :
Answer» SYMBIOTIC ASSOCIATION of fungi with algae symbiotic association of fungi with gymnosperms symbiotic association of fungi with angiosperms symbiotic association of fungi with the roots of CERTAIN seed-bearing plants Answer :D

Discussion

12316.	Question : Mycorrhiza help in absorption of:
Answer» Sulphur PHOSPHORUS Calcium Iron SOLUTION :Phosphorus

Discussion

12317.	Question : Mycorrhiza does not help the host plant in(A) Enhancing its phosphorus uptake capacity(B) Increasing its tolerance to drought(C) Enhancing its resistance to root pathogens(D) Increasing its resistance to insects
Answer» Enhancing its phosphorus UPTAKE capacity Increasing its tolerance to drought Enhancing its resistance to ROOT pathogens Increasing its resistance to insects Solution :Mycorrhiza (SYMBIOTIC association between root and fungi) HELP the host plant in enhancing its phosphorus uptake capacity, increasing its tolerance to drought and enhancing its resistance to root pathogens. e.g. GLOMUS.

Discussion

12318.	Question : Mycorrhiza does not help the host plant in:
Answer» ENHANCING its PHOSPHORUS uptake capacity Increasing its TOLERANCE to drought Enhancing its RESISTANCE to root pathogens Increasing its resistance to insects Answer :D

Discussion

12319.	Question : Mycoplasma are insensitive to (a) and sensitive to (b) antibiotic
Answer» (a) STREPTOMYCIN, (B) PENICILLIN (a) ERYTHROMYCIN, (b) streptomycin (a) Chloramphenical, (b) penicillin (a) penicillin, (b) chloramphenicol Answer :D

Discussion

12320.	Question : State the condition when stamens mature earlier than carpels.
Answer» ANSWER :PROTANDRY

Discussion

12321.	Question : Mutually benefical relationship is called:
Answer» COMPETITION PREDATION Amensalism Symbiosis Answer :D

Discussion

12322.	Question : Mutualistic partners show co-extinction/co-evolution.
Answer» SOLUTION :Co-evolution

Discussion

12323.	Question : Mutualism is a method of population interaction. Explain with examples.
Answer» Solution :Mutualism is referred to as the interspecific INTERACTION in which both the interacting species are benefited. Some examples of mutualism : i. Lichens represent close association between fungus and photosynthetic algae or cyanobacteria, where the fungus helps in the absorption of nutrients and provides protection white algae or cyanobacterium prepares the food. ii. Mycorrhizae are close mutual association between fungi and the roots of higher plants, where fungi helps the plant for absorption of nutrient while the plant provides food for the fungus. iii. Mutualism are FOUND in plant-animal relationships plants take the help of animals for pollination and dispersal of their SEED and animals are REWARDED in the form of nectar or edible pollen or oviposition, iv. The male bee pseudocopulates with the flower ophrys, the pollen grains are dusted on the body of male bees. v. With such pollen dust, male bee pseudocopulates to another flower of the same species and pollination takes place.

Discussion

12324.	Question : Mutualism is _____
Answer» two organisms are BENEFITTED from each other. ONE ORGANISM is benefitted and other is HARMED. both are harmed from each other. an association in which one is PARASITE and other is host. Answer :A

Discussion

12325.	Question : Mutations on genetic code atfects the phenotype. Describe with example.
Answer» Solution :The simplest type of mutation at the molecular level is a change in nucleotide that substitutes one base for another. Such changes are known as base substitutions which may occur spontaneously or due to the ACTION of mutagens. A well studied example is SICKLE cell anaemia in humans which results from a point mutation of an allele of B-haemoglobin gene `(betaHB).` A hacmoglobin molecule CONSISTS of four polypeptide chains of two types, two a chains and two `beta`-chains. Each chain has a heme group on its surface. The heme groups are involved in the binding of oxygen. The human blood disease, sickle cell anaemia 1S due to abnormal haemoglobin. This abnormality in haemoglobin is due to a single base substitution at the SIxth codon of the beta globin gene from GAG to GTG in `beta` -chain of haemoglobin. It results n a change of amino acid glutamic acid to valine at the 6th position of the `beta` -chain.This is the classical example of point mutation that results in the change of amino acids residue gutamie acid to valine. The mutant haemoglobin undergoes polymerisation under oxygen tensior causing the change in the shape of the RBC from biconcave to a sickle shaped structure.

Discussion

12326.	Question : Mutations induced by 5-bromo uracil are
Answer» Transversional mutations Transitional mutations Frame SHIFT mutations Backward mutations Answer :B

Discussion

12327.	Question : Mutations can be induced with
Answer» INFRA RED RADIATIONS IAA Ethylene Gamma radiations Answer :D

Discussion

12328.	Question : Mutations are beneficial for plant breeding. Taking an example, justify the statement.
Answer» Solution :Mutation is the process : (i) In which genetic variations are created through changes, in the base sequence within genes resulting in the creation of a new CHARACTER or trait not found in the parental type. (ii) It is possible to induce mutations ARTIFICIALLY through use of chemicals or RADIATIONS (like gamma radiations) and SELECTING and using the plants that have the desirable character as a source in breeding. (iii) This process is called mutation breeding. (iv) In mung BEAN, resistance to yellow mosaic virus and powdery mildew were induced by mutations.

Discussion

12329.	Question : Mutations
Answer» A. TAKE place GRADUALLY and in small steps B. are all HERITABLE and give rise to new species C.are subject to natural SELECTION D. are random changes in base SEQUENCE of RNA Solution : are subject to natural selection

Discussion

12330.	Question : Write a note on mutational breeding.
Answer» SOLUTION :(1)The induction and UTILIZATION of mutation in developing desirable traits in an organism is called mutational breeding.(2)It is mostly used for producing dicease varieties of PLANTS.(3)Throygh mutational breeding disease RESISTANT varieties of moong beans to yallow mosaic virus and powdery mildew have been developed.

Discussion

12331.	Question : Mutation theory was proposed by:
Answer» Darwin de Vries Mendel Lamarck Answer :B

Discussion

12332.	Question : Mutation theory was proposed by ...............
Answer» a) T.H . Morgan B) HUGO de VRIES C) Alfred Sturtevant d) Sutton and Boveri Answer :B

Discussion

12333.	Question : Mutation that occurs due to addition of a part of chromosome so that gene(s) is/are represented twice,is called
Answer» Addition Insertion Duplication Transition Answer :C

Discussion

12334.	Question : Mutation is due to
Answer» LOSS of a segment of DNA Gain of a segment of DNA Change in a single BASE pair of DNA All these Answer :D

Discussion

12335.	Question : Mutation is more common when it is present in
Answer» (a) Recessive condition (b) DOMINANT condition (c) Constant in POPULATION (d) NONE of these Solution :Dominant condition

Discussion

12336.	Question : Mutation in _____ cells of the body brings about phenotypic changes in the offsprings.
Answer» ANSWER :GERM

Discussion

12337.	Question : mutaion at tahe chromosmol leval with an addition n indvdual chromosome is referred to as:
Answer» Polysomy POLY PLOIDY POINT mution STRUCTURAL mutaion Answer :C

Discussion

12338.	Question : Mutagens are the substances that induces mutation. Name any two physical and chemical mutagens.
Answer» Solution :UV SHORT waves, X-rays - PHYSICAL MUTAGENS. Nitromethyl, Urea - Chemical mutagens.

Discussion

12339.	Question : Mustard and tomato are examples of hypogynous flower.
Answer» ANSWER :1

Discussion

12340.	Question : Mushrooms, bracket fungi or fuffballs are placed in :-
Answer» ASCOMYCETES BASIDIOMYCETES Deuteromycetes Phycomycetes Answer :D

Discussion

12341.	Question : Muscular ridges present inside each ventricle are
Answer» TRABECULAE carneae Chordae tendineae Papillary muscles Pectinate muscles Answer :A

Discussion

12342.	Question : Muscular ridges at inner surface of ventricles are called …………… .
Answer» CHORDAE tendinae interventricular SEPTUM papillaey muscle trabeculae carnae Answer :D

Discussion

12343.	Question : Muscular and nervous excitability is reduced by:-
Answer» `NA^(+)` `K^(+)` `Ca^(++)` `MG^(++)` ANSWER :B

Discussion

12344.	Question : Muscles with characteristic striations and involuntary are
Answer» MUSCLES in the WALL of alimentary canal muscles of the heart muscles ASSISTING locomotion muscles of the eyelids. Answer :B

Discussion

12345.	Question : Muscle that is attached to the malleus is
Answer» Orbicularis oris Masseter Stapedius TENSOR tympani Answer :D

Discussion

12346.	Question : Muscle fatigue is due to accumulation of
Answer» Myoglobin Glucose LACTIC ACID PHOSPHOCREATINE ANSWER :C

Discussion

12347.	Question : Murrah is a high milk yielding breed of cow/buffalo of Haryana/ Gujarat.
Answer» ANSWER :BUFFALO, HARYANA

Discussion

12348.	Question : Murein is found in the cell wall of:
Answer» Diatoms Cyanobacteria Archaea Mycoplasma Answer :B

Discussion

12349.	Question : Murrah, Meshsana,Jaffrabadi are breeds of :
Answer» Buffalo Cow Cattle Horse Answer :A

Discussion

12350.	Question : Murein is found in the cell wall of :
Answer» Diatoms Cyanobacteria Archaea Mycoplasma Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Myosin head separates from actin when :

Question : Myopia is an example of ………….. .

Question : Myoglobins are present in R.B.Cs.

Question : Mydriasis is :-

Question : Mycorrhizal hyphae prove useful to the plant by:

Question : Mycorrhizae are symbiotic association between

Question : Mycorrhizae are more common in :

Question : Mycorrhiza is used in

Question : Mycorrhiza promotes plant growth by ……………………………

Question : Mycorrhiza is symbiotic association betweenA) Algae and fungiB)Fungi and plant rootC)Bacteria and fungi

Question : Mycorrhiza is an assoication between :

Question : Mycorrhiza is an example of:

Question : Mycorrhiza establishes symbiosis between :

Question : Mycorrhiza is :-

Question : Mycorrhiza is a :

Question : Mycorrhiza help in absorption of:

Question : Mycorrhiza does not help the host plant in(A) Enhancing its phosphorus uptake capacity(B) Increasing its tolerance to drought(C) Enhancing its resistance to root pathogens(D) Increasing its resistance to insects

Question : Mycorrhiza does not help the host plant in:

Question : Mycoplasma are insensitive to (a) and sensitive to (b) antibiotic

Question : State the condition when stamens mature earlier than carpels.

Question : Mutually benefical relationship is called:

Question : Mutualistic partners show co-extinction/co-evolution.

Question : Mutualism is a method of population interaction. Explain with examples.

Question : Mutualism is _____

Question : Mutations on genetic code atfects the phenotype. Describe with example.

Question : Mutations induced by 5-bromo uracil are

Question : Mutations can be induced with

Question : Mutations are beneficial for plant breeding. Taking an example, justify the statement.

Question : Mutations

Question : Write a note on mutational breeding.

Question : Mutation theory was proposed by:

Question : Mutation theory was proposed by ...............

Question : Mutation that occurs due to addition of a part of chromosome so that gene(s) is/are represented twice,is called

Question : Mutation is due to

Question : Mutation is more common when it is present in

Question : Mutation in _____ cells of the body brings about phenotypic changes in the offsprings.

Question : mutaion at tahe chromosmol leval with an addition n indvdual chromosome is referred to as:

Question : Mutagens are the substances that induces mutation. Name any two physical and chemical mutagens.

Question : Mustard and tomato are examples of hypogynous flower.

Question : Mushrooms, bracket fungi or fuffballs are placed in :-

Question : Muscular ridges present inside each ventricle are

Question : Muscular ridges at inner surface of ventricles are called …………… .

Question : Muscular and nervous excitability is reduced by:-

Question : Muscles with characteristic striations and involuntary are

Question : Muscle that is attached to the malleus is

Question : Muscle fatigue is due to accumulation of

Question : Murrah is a high milk yielding breed of cow/buffalo of Haryana/ Gujarat.

Question : Murein is found in the cell wall of:

Question : Murrah, Meshsana,Jaffrabadi are breeds of :

Question : Murein is found in the cell wall of :