24277 + Interview Questions in Biology in Class 12 Page 238 InterviewSolution

11851.	Question :Name the muscular and the glandular layers of human uterus . Which one of these layeres undergoes cyclic changes during menstrual cycle ? Name the hormone essential for the maintenance of this layer
Answer» Solution :The muscular layer of UTERUS ismyometrium (Middle thick layer of the smooth muscle)and the glandular layer of the UTERINE cavity is endometnum (innermost). The ENDOMETRIUM UNDERGOES cyclic changes during the menstrual cycle Progesterone is the hormone ESSENTIAL for the maintenance of the endometrjum.

Discussion

11852.	Question : Name the movement launched by the people of Mandal village to protect the trees by hugging them.
Answer» SOLUTION :CHIPKO MOVEMENT.

Discussion

11853.	Question : Name the mould that produces antibiotic penicillin.
Answer» ANSWER :PENICILLIUM notatum

Discussion

11854.	Question : Name the most thickly populated and least populous states of India.
Answer» SOLUTION :UTTAR PRADESH, SIKKIM

Discussion

11855.	Question : Name the most serious water pollutant.
Answer» ANSWER :A::D

Discussion

11856.	Question : Name the most suitable species of honey bee for apiculture.
Answer» SOLUTION :APIS mellifera.

Discussion

11857.	Question : Name the most effective long-acting reversible contraceptive methods.
Answer» SOLUTION :INTRAUTERINE DEVICES and CONTRACEPTIVE IMPLANTS.

Discussion

11858.	Question : Name the molecular scissors used in recombinant DNA (rDNA) technology.
Answer» SOLUTION :RESTRICTION Enzymes/Restriction endonuclease/REN.

Discussion

11859.	Question : Name the milch breed of cows in Punjab and Haryana .
Answer» ANSWER :SAHIWAL

Discussion

11860.	Question : Name the middle part of long bones ?
Answer» ANSWER :Diaphys

Discussion

11861.	Question : Name the microorganisms that cause ripening of Roquefort cheese.
Answer» ANSWER :FUNGI

Discussion

11862.	Question : Name the microbes employed to produce biogas.
Answer» SOLUTION :METHANOGENS

Discussion

11863.	Question : Name the microbe which is used to produce citric acid.
Answer» SOLUTION :ASPERGILLUS NIGER

Discussion

11864.	Question : Name the microbe which forms acetic acid.
Answer» SOLUTION :ACETOBACTER ACETI

Discussion

11865.	Question :Name the microbe used in the production citric acid .
Answer» SOLUTION :ASPERGILLUS NIGER

Discussion

11866.	Question : Name the methods employed in animal breeding. According to you which of the method is best and why?
Answer» Solution :Animal BREEDING are as follows: (1) Inbreeding and (2) Outbreeding, and (3) Artificial methods 1. Inbreeding is the MATING between more closely individuals of same BREED. 2. Outbreeding is the mating between different unrelated animals. Outbreeding is the best method for animal breeding because it overcomes inbreeding depression. Increases vigour, higher GROWTH rate and enhanced PRODUCTIVITY.

Discussion

11867.	Question : Name the methods of selection.
Answer» Solution :There are THREE methods of selection.They are (i)MASS selection (II) PURELINE selection (III)Clonal selection.

Discussion

11868.	Question : Name the methods employed in animal breeding. According to you which of the methods is best? Why?
Answer» Solution :Animal breeding METHODS : (i) INBREEDING (ii) Out breeding : It includes out crossing, crossbreeding and interspecific hybridisation can be included. (iii) Artificial Insemination : It is the best ecause the capacity of pregnancy increases in it and DESIRABLE matings can be CARRIED out.

Discussion

11869.	Question : Name the method/s by which the transgenic sheeps and goats are made. What are other methods?
Answer» Solution :Transgenic sheeps and goats are MADE by injecting new DNA directly into the nucleus of FERTILISED eggs. The other methods of delivering new DNA into MAMMALIAN cell are- i) by DNA-coated tungsten bullets, ii) in a CALCIUM phoshate precipitate and (iii) by electroporation.

Discussion

11870.	Question : name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase in the girth of the organ in which they are active.
Answer» ANSWER :LATERAL MERISTEMS (Vascular combium and CORK cambium).

Discussion

11871.	Question : Name the metal present in haemoglobin
Answer» ANSWER :FE

Discussion

11872.	Question : Name the mechanism responsible for the formation of seed without fertilization in angiosperms. Give an example of flowering plants withsuch seed formation.
Answer» SOLUTION :APOMIXIS, e.g. GRASSES and MEMBERS of ASTERACEAE

Discussion

11873.	Question : Name the mechanism by which new alleles appear in a population.
Answer» SOLUTION :MUTATION

Discussion

11874.	Question : Name the major RNA types of prokaryotes and mention their role.
Answer» Solution :In prokaryotes, there are three major types of RNAs: MRNA, tRNA, and rRNA. All three RNAs are needed to synthesize a protein in a cell. The mRNA provides the template, tRNA BRINGS AMINO ACIDS and READS the genetic code, and rRNAs play structural and catalytic role during translation.

Discussion

11875.	Question :Name the major biomes of the Earth.
Answer» SOLUTION :TUNDRA biome, Taiga biome, Grassland biome, Alpine biome, FOREST biome and DESERT biome

Discussion

11876.	Question :Name the longest gene.
Answer» SOLUTION :Duchenne muscular DYSTROPHY (2400 KILO BASE PAIRS)

Discussion

11877.	Question : Name the lymphoid organ in humans where all the blood cells are produced.
Answer» SOLUTION :BONE MARROW

Discussion

11878.	Question : Name the ligaments that keep uterus in place.
Answer» Solution :UTERUS is CONNECTED to ovary by ovarian ligaments and suspensory ligaments connects uterus to lateral BODY wall, the mesometrium which is DOUBLE peritoneum or broad ligament that helps in the attachment of the uterus to the body wall.

Discussion

11879.	Question : Name the liver disorder associated with alcoholism.
Answer» Solution :FATTY acid syndrome, ALSO CALLED cirrhosis.

Discussion

11880.	Question : Name the ligaments that hold ovaries in place.
Answer» Solution :Two ligaments keep each ovary in position. These are (a) Suspensory LIGAMENT from MESOVARIUM to BODY wall, and (b) OVARIAN ligament from ovary to uterus.

Discussion

11881.	Question : Name the lice that cause pubic itching .
Answer» ANSWER :Phthirus PUBIS

Discussion

11882.	Question : Name the layers of peritoneum that surrounds the heart sequentially from outside to inside.
Answer» Solution :Fiborus PERICARDIUM, visceral layer of SEROUS pericardium called epicardium and PARIETAL layer of serous pericardium.

Discussion

11883.	Question : Name the layer of the uterus that exhibits strong contractions during parturition.
Answer» SOLUTION :MYOMETRIUM

Discussion

11884.	Question : Name the law that states that the sum of allelic frequencies in a population remains constant. What are the five factors that influence these values '?
Answer» Solution :Hardy - Weinberg principle states that the sum of allelic FREQUENCIES in a population remains constant. Five factors are known to affect Hardy-Weinberg equilibrium. These are gene migration or gene FLOW, genetic drift, mutation, genetic recombination and natural selection. (i) Gene migration or gene flow :When migration of a section of populations to another place occurs, gene frequencies change in the original as well as in the new population. New genes/alleles are added to the new population and these are lost from the old population. (ii) Genetic drift : It refers to the ELIMINATION of the genes of certain traits when a section of population migrates or DIES of natural calamity. (iii) Mutation : The sudden heritable change which is direction LESS in gene and alter the genetic makeup of an individual. (iv) Genetic recombination : It occurs during gamete formation when chromosomes pass from parent to offspring. (v) Natural selection : It is an phenomenon by which some numbers of the population having traits that enable them to grow and reproduce at higher rate are favoured.

Discussion

11885.	Question : Name the layer of cells which forms the outer wall of blastocoel.
Answer» SOLUTION :TROPHOBLAST

Discussion

11886.	Question : Name the largest lymphatic organ in the human body.
Answer» ANSWER :SPLEEN

Discussion

11887.	Question : Name the largest commissure present in human brain.
Answer» SOLUTION :CORPUS CALLOSUM.

Discussion

11888.	Question : Name the largest animal of the world.
Answer» ANSWER :BLUE WHALE,

Discussion

11889.	Question : Name the kind of interaction in the following pairs. (a) Shark and Sucker fish (b) Cat and Rat (c) Lion and Deer
Answer» SOLUTION :(a) Commensalism (B) Amensalism (c) Predation

Discussion

11890.	Question :Name the kind of diseases/disorders and any two symptoms that are likely to occur in humans if: (a) Mutation in the gene that codes for an enzyme phenylalanine hydroxylase occurs. (b) The karyotype is XXY.
Answer» Solution :(a) Phenylalanine hydroxylase converts amino acid phenylalanine into another amino acid, tyrosine.It due to mutation, phenylalanine hydroxylase (PAH) does not form, Phenylalanine `overset("PAH")RARR` Tyrosine It leads to buildup of phenylalanine to toxic levels, a condition called phenylketonuria. The disease leads to mental disorders, seizures and intellectual disability. (b) The karyotype XXY is present in a syndrome called Klinefelter syndrome. It results from two or more X-chromosome in males. Symptoms include weaker muscles, greater HEIGHT,less body HAIR, breast GROWTH POOR coordination and infertility.

Discussion

11891.	Question : Name the island where Darwin observed the modification of beak in birds.
Answer» ANSWER :GALAPAGOS ISLAND

Discussion

11892.	Question :Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction
Answer» CALCIUM MAGNESIUM SODIUM POTASSIUM ANSWER :A

Discussion

11893.	Question : Name the International treaty which controls the emission of ozone depleting substances.
Answer» SOLUTION :Montreal Protocol. Detailed Answer: The Montreal Protocol is International treaty designed to protect the OZONE layer by phasing out the PRODUCTION of NUMEROUS substances that are responsible for ozone DEPLETION.

Discussion

11894.	Question : Name the interaction in: (a) Lichen (b) Sucker fish and shark (c) A protozoan living in the digestive tract of a flea living on dog.
Answer» SOLUTION :(a) Lichen shows mutualism between alga and fungus. THUS this interaction is mutualism. (b) In SUCKER FISH and shark, sucker fish is benefitted for free rides, shark neither gets benfitted nor harmed. Thus this interaction is commensalism. (c) A protozoan living inside the body of flea is a hyperparasite. Flea is also blood SUCKING ectoparasite on the dog. Therefore, a protozoan becomes hyperparasite in its interaction.

Discussion

11895.	Question : Name the interaction in each of the following: (a) Ascaris worms living in the intestine of Human (b) Wasp pollinating fig inflorescence (c) Clown fish living among the tentacles of Sea anemone (d) Disappearance of smaller barnacles when Balanus dominated in the coast of Scotland. (e) Five closely related species of warblers living on the same tree.
Answer» SOLUTION :(a) Parasitism. (b) MUTUALISM. (c) Commensalism. (d) Compeititive RELEASE. (e) COMPETITION with resource partitioning.

Discussion

11896.	Question :Name the insulin obtained from a genetically modified microorganism. Also name that microorganism.
Answer» SOLUTION :HUMULIN, E. COLI

Discussion

11897.	Question : Name the instrument used to measure blood pressure.
Answer» SOLUTION :Sphygmomanometer is USED to measure BLOOD PRESSURE.

Discussion

11898.	Question : Name the insect resistance varieties developed in the following crops. (1) Okra(2) Rapeseed mustard
Answer» SOLUTION :(a) Okra (b) Rapeseed mustard. (a) Okra: PUSA Sawani and Pusa A-4 varieties of Okra are RESISTANCE to shoot an friut borers.(b) Rapeseed mustard: Pusa Gaurav variety of rapeseed mustard SHOWN resistance against Aphids.

Discussion

11899.	Question : Name the infectious disease which causes wasting of body parts. Give the scientific name of the pathogen and mention the body organs it primarily affects.
Answer» SOLUTION :AIDS, HIV, HELPER T-cells

Discussion

11900.	Question : Name the initial cells of the male and female gametophytes.
Answer» Solution :The haploid microspores (n) and MEGASPORES (n) are the INITIAL CELLS of the male and FEMALE gametophytes.

Discussion

Explore topic-wise InterviewSolutions in .

Question :Name the muscular and the glandular layers of human uterus . Which one of these layeres undergoes cyclic changes during menstrual cycle ? Name the hormone essential for the maintenance of this layer

Question : Name the movement launched by the people of Mandal village to protect the trees by hugging them.

Question : Name the mould that produces antibiotic penicillin.

Question : Name the most thickly populated and least populous states of India.

Question : Name the most serious water pollutant.

Question : Name the most suitable species of honey bee for apiculture.

Question : Name the most effective long-acting reversible contraceptive methods.

Question : Name the molecular scissors used in recombinant DNA (rDNA) technology.

Question : Name the milch breed of cows in Punjab and Haryana .

Question : Name the middle part of long bones ?

Question : Name the microorganisms that cause ripening of Roquefort cheese.

Question : Name the microbes employed to produce biogas.

Question : Name the microbe which is used to produce citric acid.

Question : Name the microbe which forms acetic acid.

Question :Name the microbe used in the production citric acid .

Question : Name the methods employed in animal breeding. According to you which of the method is best and why?

Question : Name the methods of selection.

Question : Name the methods employed in animal breeding. According to you which of the methods is best? Why?

Question : Name the method/s by which the transgenic sheeps and goats are made. What are other methods?

Question : name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase in the girth of the organ in which they are active.

Question : Name the metal present in haemoglobin

Question : Name the mechanism responsible for the formation of seed without fertilization in angiosperms. Give an example of flowering plants withsuch seed formation.

Question : Name the mechanism by which new alleles appear in a population.

Question : Name the major RNA types of prokaryotes and mention their role.

Question :Name the major biomes of the Earth.

Question :Name the longest gene.

Question : Name the lymphoid organ in humans where all the blood cells are produced.

Question : Name the ligaments that keep uterus in place.

Question : Name the liver disorder associated with alcoholism.

Question : Name the ligaments that hold ovaries in place.

Question : Name the lice that cause pubic itching .

Question : Name the layers of peritoneum that surrounds the heart sequentially from outside to inside.

Question : Name the layer of the uterus that exhibits strong contractions during parturition.

Question : Name the law that states that the sum of allelic frequencies in a population remains constant. What are the five factors that influence these values '?

Question : Name the layer of cells which forms the outer wall of blastocoel.

Question : Name the largest lymphatic organ in the human body.

Question : Name the largest commissure present in human brain.

Question : Name the largest animal of the world.

Question : Name the kind of interaction in the following pairs. (a) Shark and Sucker fish (b) Cat and Rat (c) Lion and Deer

Question :Name the kind of diseases/disorders and any two symptoms that are likely to occur in humans if: (a) Mutation in the gene that codes for an enzyme phenylalanine hydroxylase occurs. (b) The karyotype is XXY.

Question : Name the island where Darwin observed the modification of beak in birds.

Question :Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction

Question : Name the International treaty which controls the emission of ozone depleting substances.

Question : Name the interaction in: (a) Lichen (b) Sucker fish and shark (c) A protozoan living in the digestive tract of a flea living on dog.

Question :Name the insulin obtained from a genetically modified microorganism. Also name that microorganism.

Question : Name the instrument used to measure blood pressure.

Question : Name the insect resistance varieties developed in the following crops. (1) Okra(2) Rapeseed mustard

Question : Name the infectious disease which causes wasting of body parts. Give the scientific name of the pathogen and mention the body organs it primarily affects.

Question : Name the initial cells of the male and female gametophytes.