24277 + Interview Questions in Biology in Class 12 Page 110 InterviewSolution

5451.	Question : The mutations that involve addition, deletion or substitution of a single base pair in a gene are referred to as
Answer» POINT mutations lethal mutations silent mutations retrogressive mutations Answer :a

Discussion

5452.	Question : The mutation in germ cells
Answer» Are more DELETERIOUS Are LESS deleterious Can be detected only in the next GENERATION Can be detected in the DAME generation of an individual Answer :C

Discussion

5453.	Question :The muscles of the face are
Answer» Striated muscle Non-striated muscle Cardiac Both (1) & (2) ANSWER :A

Discussion

5454.	Question : The muscle fatigue occurs due to accumulation of :-
Answer» `CO_(2)` LACTIC acid Creatine phosphate Myosin ATPase Answer :B

Discussion

5455.	Question : The muscle which moves a limb away from the median axis is called
Answer» Supinator Pronator Abductor Adductor ANSWER :C

Discussion

5456.	Question : The movements of nutrients through the different components of ecosystem is called
Answer» NUTRIENT CYCLING Biogeological cycling Biogeochemical CYCLE Both (A) and (C) SOLUTION :Both (A) and (C)

Discussion

5457.	Question : The movement of nutrient elements through various component of an ecosystem is called _____
Answer» SOLUTION :NUTRIENT CYCLE or Biogeochemical cycle

Discussion

5458.	Question : The movement of free atoms from higher concentration to lower concentration is called
Answer» Osmosis Diffusion ENDOSMOSIS Exosmosis Answer :B

Discussion

5459.	Question : The movement of a molecule across a typical plant cell (about 50mum) takes approximately 2.5S. At this rate calculate how many years it would take for the movement of molecules over a distance of 1 m within a plant by dissusion alone?
Answer» ANSWER :`1.58xx10^(-3)` YEARS

Discussion

5460.	Question : The movement of a gene from one linkage group to another is called
Answer» INVERSION DUPLICATION Translocation Crossing over Answer :C

Discussion

5461.	Question : The mouth parts of all insects contain the similar structures and so they are
Answer» ANALOGOUS ORGANS HOMOLOGOUS organs Vestigial organs Atavistic organs Answer :B

Discussion

5462.	Question : The mouth ofleech is a ________ aperture situated in the middle of the anterior sucker.
Answer» SOLUTION :triadiate

Discussion

5463.	Question : The motile reproductive structure of algae and fungi, which directly give rise to new individuals are called
Answer» Zygospores Zoospores Cysts Conidia. Answer :B

Discussion

5464.	Question : The mother's blood never gets mixed with that of foetal blood, yet it provides nutrition to foetus. How?
Answer» SOLUTION :The blood vessels of MOTHER and foetus lie very CLOSE to each other. All the physiological ACTIVITIES of foetus are carried out by DIFFUSION.

Discussion

5465.	Question : The mother germs cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
Answer» Solution :A = PRIMARY oocyte, B = Secondary follicle, C = Secondary oocyte The CELLS of GERMINAL epithelium repeatedly divide TILL secondary OOCYTES are not produced. Ovum possesses growth and forms primary oocytes. Granulas cells surround each primary oocyte and also known as primary follicle. Many layers of granulosa are arranged a round primary follicles and they are known as secondary follicles. Seondary follicle immediately convert into tertiary and quaternary follicles which is filled with liquid Antrum in lumen and produces a primary polar body. Quaternary follicle transforms into again mature follicle or Graafian follicle. Graafian follicle breaks by process of ovulation from ovary and produces secondary oocytes.

Discussion

5466.	Question : The most unique mammalian characteristic is the:-
Answer» MAMMARY glands Internal fertilisation Warm BLOODED body Heart is FOUR chambered Answer :A

Discussion

5467.	Question :The most serious consequence of a decrease in global diversity would be the :
Answer» Loss of source of genetic diversity to preserve endangered species Increase in the abundance and diversity of EDGE- adapted species Potential loss of ecosystem services on which HUMAN beings depend Increase in GLOBAL WARMING and thinning of the ozone layer Answer :C

Discussion

5468.	Question : The most thoroughly studies of the known bacteria-plant interaction is the:
Answer» Nodulation of Sesbamnia stems by `N_2` fixing bacteria Plant growth stimulation by phosphate solubilising bacteria Cyanobacterial SYMBIOSIS with some AQUATIC ferns Gall formation on certain ANGIOSPERMS by Agrobacterium Answer :D

Discussion

5469.	Question : The most recent ancestor of living moden man, that emerged about 34,000 years ago
Answer» Cro-Magnon MAN Java APE man NEANDERTHAL man Peking man Answer :A

Discussion

5470.	Question : The most recent and direct prehistoric ancestor
Answer» CROMAGNON Pre-Neanderthal Neanderthal None of the above SOLUTION :Cromagnon

Discussion

5471.	Question : The most primitive bilaterally symmetrical organism is :-
Answer» Ascaris Fasciola Leucosolenia Hydra Answer :B

Discussion

5472.	Question : The most likely reason for the development of resistance against pesticides in insects damaging crops is
Answer» GENETIC recombination directed mutations acquired HERITABLE changes None of these Answer :B

Discussion

5473.	Question : The most likelyreason for the developoment of resistanceagainst pesticides in insects damaging a corp is
Answer» RANDOM MUTATIONS GENETIC recombination Directed mutations Acquired HERITABLE changes Answer :A

Discussion

5474.	Question : The most likely reason for the development of resistance against pesticides in insect damaging a crop is
Answer» RANDOM mutations genetic recombination directed mutations acquired HERITABLE changes Answer :A

Discussion

5475.	Question : The most important use of citric acid is in form of vinegar.
Answer» True False Answer :ACETIC ACID

Discussion

5476.	Question : The most important pattern of biodiversity is........
Answer» LONGITUDINAL GRADIENT in diversity Latitudinal gradient in diversity Polar gradient diversity Equatorial gradient in diversity Answer :B

Discussion

5477.	Question : The most important feature in a plasmid to serve as a vector in gene cloning experiment is:
Answer» Origin of replication (ori) PRESENCE of a selectable marker Presence of SITES for restriction endonuclease Its size Solution :Origin of replication (ori) (A) The most IMPORTANT feature in a plasmid to be used as a VECTOR is origin of replication (ori) because ori is that sequence of DNA which is responsible for initiating replication. Any piece of DNA when linked to this sequence can replicate within the host cell. Also, the ori controls copy NUMBER of linked DNA.

Discussion

5478.	Question : The most important function of diaphragm in mammals is
Answer» To aid in formation of OXYHAEMOGLOBIN To aid in ventilation To DIVIDE the BODY cabith into compartments To aid in swallowing Answer :B

Discussion

5479.	Question :The most important hormone in initiating and maintaining lactation after birth is
Answer» a) OESTROGEN B) FSH c) Prolactin d) Oxytocin Solution :Prolactin

Discussion

5480.	Question : The most important feature of all living system from the viewpoint of the their continuity is their capacity to:
Answer» UTILIZE OXYGEN to generate energy Utilize solar energyfor metabolic activities REPLICATE the genetic information Produce gametes Answer :C

Discussion

5481.	Question : The most important feature in a plasmid to be used as a vector is
Answer» Origin of REPLICATION Presence of a SELECTABLE marker Presence of SITES for restriction endonuclease Its SIZE Answer :A

Discussion

5482.	Question : The most extensively used bacteria in genetic engineering is
Answer» Bacillus Clostridium Escericha Salmonella Answer :C

Discussion

5483.	Question : The most important factor which determined the increase in human population in india during 20th century was
Answer» Natality Mortality IMMIGRATION EMIGRATION ANSWER :A

Discussion

5484.	Question : The most important cause driving animals and plants to extinctions is(A) Alien species invasions(B) Over-exploitation(C) Habitat loss and fragmentation(D) Co-extinctions
Answer» Alien SPECIES invasions Over-exploitation Habitat LOSS and FRAGMENTATION Co-extinctions Answer :C

Discussion

5485.	Question : The most important component of the oral contraceptive pill is:
Answer» Progesterone Growth hormone Thyroxine Luteinizing hormone Answer :D

Discussion

5486.	Question : The most important component of the oral contraceptive pills of
Answer» Progesterone Growth HORMONE THYROXINE Lutteinizing hormone Answer :A

Discussion

5487.	Question : The most effective way to get relief from high temperature is
Answer» OIL SECRETION Frequent urination High WATER intake Profuse sweating ANSWER :D

Discussion

5488.	Question : The most effective methods often used when a woman.s fallopian tubes are blocked or when a man produces very few sperms.
Answer» MTP GIFT ZIFT IVF ANSWER :D

Discussion

5489.	Question : The most exceptional feature of zoophilous flower is(A) scented having nectar and most colourful(B) scented, having nectar but inconspicuous(C) presence of only perianth(D) without colour and show
Answer» SCENTED having NECTAR and most colourful scented, having nectar but inconspicuous presence of only perianth without COLOUR and show Answer :A

Discussion

5490.	Question : The most effective method of vegetative propagation in Cynodon is by the production of ……….. .
Answer» stolon sucker runner offset Answer :C

Discussion

5491.	Question :The most direct threat to biodiversity is :
Answer» Increased LEVELS of ATMOSPHERIC `CO_2` Depletion of OZONE layer Over exploitation of selected species Habitat destruction Answer :D

Discussion

5492.	Question : The most correct definition of genus may be :-
Answer» Genus is an aggregate of DISTANTLY RELATED species Genus is a group of species present in a GIVEN area Genus is an aggregate of CLOSELY related species Genus is a group of species present in a common habitat Answer :C

Discussion

5493.	Question : The most commonly usedmatrix for gel electrophoresis is
Answer» Agarose PROTEINS LIPIDS Organic acids Answer :A

Discussion

5494.	Question : The most common types of fossils are ………… .
Answer» moulds casts actual remains models Answer :C

Discussion

5495.	Question : The most common type of tapetum is
Answer» SECRETARY or GLANDULAR type AMOEBOID or invasive type Nonglandular and noninvasive type Resupinate type Answer :B

Discussion

5496.	Question : The most common substrate used in distilleries for the production of ethanol is
Answer» CORN meal Soya meal Ground gram Molasses ANSWER :D

Discussion

5497.	Question : The most common substrate used in distilleries for the production of ethanol is:
Answer» CORN meal Soya meal Trichoderma Molasses Answer :D

Discussion

5498.	Question : The most common substrate used in distilleries for the production of ethanol is(A) Corn meal(B) Soya meal(C) Ground gram(D) Molasses
Answer» CORN MEAL SOYA meal groundgram MOLASSES Solution :molasses

Discussion

5499.	Question : The most common substrate used in distilleries for the production of ethanol is___________
Answer» Soyameal Groundram MOLASSES CORN meal Answer :C

Discussion

5500.	Question : The most common sources of single cell protein
Answer» yeasts bacteria other fungi All of these SOLUTION :All of these

Discussion

Explore topic-wise InterviewSolutions in .

Question : The mutations that involve addition, deletion or substitution of a single base pair in a gene are referred to as

Question : The mutation in germ cells

Question :The muscles of the face are

Question : The muscle fatigue occurs due to accumulation of :-

Question : The muscle which moves a limb away from the median axis is called

Question : The movements of nutrients through the different components of ecosystem is called

Question : The movement of nutrient elements through various component of an ecosystem is called _____

Question : The movement of free atoms from higher concentration to lower concentration is called

Question : The movement of a molecule across a typical plant cell (about 50mum) takes approximately 2.5S. At this rate calculate how many years it would take for the movement of molecules over a distance of 1 m within a plant by dissusion alone?

Question : The movement of a gene from one linkage group to another is called

Question : The mouth parts of all insects contain the similar structures and so they are

Question : The mouth ofleech is a ________ aperture situated in the middle of the anterior sucker.

Question : The motile reproductive structure of algae and fungi, which directly give rise to new individuals are called

Question : The mother's blood never gets mixed with that of foetal blood, yet it provides nutrition to foetus. How?

Question : The mother germs cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.

Question : The most unique mammalian characteristic is the:-

Question :The most serious consequence of a decrease in global diversity would be the :

Question : The most thoroughly studies of the known bacteria-plant interaction is the:

Question : The most recent ancestor of living moden man, that emerged about 34,000 years ago

Question : The most recent and direct prehistoric ancestor

Question : The most primitive bilaterally symmetrical organism is :-

Question : The most likely reason for the development of resistance against pesticides in insects damaging crops is

Question : The most likelyreason for the developoment of resistanceagainst pesticides in insects damaging a corp is

Question : The most likely reason for the development of resistance against pesticides in insect damaging a crop is

Question : The most important use of citric acid is in form of vinegar.

Question : The most important pattern of biodiversity is........

Question : The most important feature in a plasmid to serve as a vector in gene cloning experiment is:

Question : The most important function of diaphragm in mammals is

Question :The most important hormone in initiating and maintaining lactation after birth is

Question : The most important feature of all living system from the viewpoint of the their continuity is their capacity to:

Question : The most important feature in a plasmid to be used as a vector is

Question : The most extensively used bacteria in genetic engineering is

Question : The most important factor which determined the increase in human population in india during 20th century was

Question : The most important cause driving animals and plants to extinctions is(A) Alien species invasions(B) Over-exploitation(C) Habitat loss and fragmentation(D) Co-extinctions

Question : The most important component of the oral contraceptive pill is:

Question : The most important component of the oral contraceptive pills of

Question : The most effective way to get relief from high temperature is

Question : The most effective methods often used when a woman.s fallopian tubes are blocked or when a man produces very few sperms.

Question : The most exceptional feature of zoophilous flower is(A) scented having nectar and most colourful(B) scented, having nectar but inconspicuous(C) presence of only perianth(D) without colour and show

Question : The most effective method of vegetative propagation in Cynodon is by the production of ……….. .

Question :The most direct threat to biodiversity is :

Question : The most correct definition of genus may be :-

Question : The most commonly usedmatrix for gel electrophoresis is

Question : The most common types of fossils are ………… .

Question : The most common type of tapetum is

Question : The most common substrate used in distilleries for the production of ethanol is

Question : The most common substrate used in distilleries for the production of ethanol is:

Question : The most common substrate used in distilleries for the production of ethanol is(A) Corn meal(B) Soya meal(C) Ground gram(D) Molasses

Question : The most common substrate used in distilleries for the production of ethanol is___________

Question : The most common sources of single cell protein