24277 + Interview Questions in Biology in Class 12 Page 234 InterviewSolution

11651.	Question : Name the two types of maps generated by HGP.
Answer» SOLUTION :Genetic linkage MAP and PHYSICAL map are the TWO TYPES of maps generated by HGP.

Discussion

11652.	Question :Name the two types of immune systems in a human body. Why are cell mediated and humoral immunities so called
Answer» Solution :The two types ofimmune SYSTEMS in a human BODY are inmate and adaptive immunity. HUMORAL immunity is called so because it consists of antibodies that are present in HUMOURS or body fluids, whereas cell-mediated immunity is PROVIDED by B-cells and T-cells.

Discussion

11653.	Question : Name the two types of food chain.
Answer» Solution :(a) GRAZING FOOD CHAIN (b) Detritus food chain

Discussion

11654.	Question : Name the two type of nutrient cycles with an example each.
Answer» Solution :GASEOUS cycles :- their reservoirs exist in the atmosphere. eg:- Carbon CYCLE, NITROGEN cycle and Hydrogen cycle. Sedimentary cycles : Reservoirs for these cycles exist in earth.s crust. eg:- Phosphorus and SULPHUR cycle.

Discussion

11655.	Question : Name the two sugar cane varieties which were successfully cronsed to produce high yielding sugar cane varieties
Answer» SOLUTION :a. SACCHARUM barberk B. Saccharum officinarum

Discussion

11656.	Question : Name the strategies used in gene therapy .
Answer» SOLUTION :(a) Gene AUGMENTATION THERAPY. (b) Gene INHIBITION therapy.

Discussion

11657.	Question : Name the two Primates those were existingin 15mya.
Answer» SOLUTION :DRYOPITHECUS and RAMAPITHECUS.

Discussion

11658.	Question : Name the two postero-lateral tissues present in the penis.
Answer» SOLUTION :CORPORA CAVERNOSA and CORPUS spongiosum.

Discussion

11659.	Question : Name the two plants where remnants of nucellus can be found in the seed.
Answer» SOLUTION :BLACK PEPPER and BEET

Discussion

11660.	Question : Name the two pollutants that undergo biomagnification.
Answer» ANSWER :D

Discussion

11661.	Question : Name the two initiating codons
Answer» SOLUTION :AUG and GUG

Discussion

11662.	Question : Name the two major groups of cells required in attaining specific immunity.
Answer» SOLUTION :T-lymphocytes, B-lymphocytes

Discussion

11663.	Question : Name the two inherent capacity responsible for cellular totipotency.
Answer» SOLUTION :REDIFFERENTIATION and DEDIFFERENTIATION.

Discussion

11664.	Question : Name the two gases contributing maximum to the green house effect.
Answer» SOLUTION :CARBONDIOXIDE and METHANE.

Discussion

11665.	Question : Name two hormone releasing IUD's.
Answer» SOLUTION :(i) PROGESTASERT (II) LNG-20

Discussion

11666.	Question : Name the two geographic zones in Tamilnadu.
Answer» Solution :(i) Coramandel (or) East COAST (ii) WESTERN GHATS

Discussion

11667.	Question :Name the two categoris of fruits and give one example of each.
Answer» Solution :FALSE fruit e,g, APPLE

Discussion

11668.	Question : Name the two classes to which Archaeopteryx acts as connecting link.
Answer» Solution :ARCHAEOPTERYX is a CONNECTING link between two classes, VIZ., REPTILIA and Aves.

Discussion

11669.	Question : mention the general names for organism that are also called as secondary and tertiary consumers.
Answer» SOLUTION :PRIMARY CARNIVORES and SECONDARY carnivores.

Discussion

11670.	Question : Name the triplet codons that code for (a) Tyrosine (b) Histidine
Answer» Solution :a) Tyrosine - UAU, UAC B) HISTIDINE - CAU, CAC

Discussion

11671.	Question : Name the transcriptionally active region of chromatin in a nucleus.
Answer» SOLUTION :Euchromatin is the transcriptionally active REGION of CHROMATIN in a NUCLEUS.

Discussion

11672.	Question : Name the toxic protein secreted by Bacillus thuringiensis.
Answer» SOLUTION : CRY PROTEIN

Discussion

11673.	Question : Name the tools of recombinant DNA technology. Write a note on restriction enzymes,
Answer» SOLUTION :EXPLAIN the PROCESS of GEL ELECTROPHORESIS.

Discussion

11674.	Question : Name the three types of silk obtained from silkworm.
Answer» SOLUTION :MULBERRY SILK, TUSSAR silk and ERI silk.

Discussion

11675.	Question : Name the types of ecological factors.
Answer» SOLUTION :(1) pyramid of NUMBER (2) pyramid of BIOMASS (3) pyramid of ENERGY.

Discussion

11676.	Question : Name the three sulci present on the cerebral hemispheres.
Answer» SOLUTION :CENTRAL SULCUS, LATERAL sulcus and parieto-occipital sulcus.

Discussion

11677.	Question : Name the three steps of PCR technique in proper sequence.
Answer» Solution :The three steps of PCR TECHNIQUE are HEAT DENATURATION. Annealing and POLYMERISATION (extension).

Discussion

11678.	Question : Name the three RNA polymerases found in eukaryotic cells and mention their functions.
Answer» SOLUTION :There are three RNA polymerases found in eukaryotic cells: (i) RNA polymerase-I : It is used to transcribes 5.8s, 18s and 28s RNA. (B) RNA polymerase-II : It is involved in the TRANSCRIPTION of MRNA precursors. It also catalyzesthe FORMATION of small nuclear RNA's and mRNA. (C) RNA polymerase-III : It is used to transcribe transfer RNA (tRNA), some ribosomal RNA.

Discussion

11679.	Question : Name the three primary germ layers of embryo. Also mention any three organs or organ systems developing from each layer.
Answer» SOLUTION :

Discussion

11680.	Question : Name the three major types of RNAs, specifying the function of each in the synthesis of Polypeptiede.
Answer» Solution :(I) mRNA-(MESSENGER RNA): decides the sequence of AMINO acids. (ii) rRNA(RIBOSOMAL RNA): (a) Recognises the codon on mRNA (b) TRANSPORT the aminoacid to the site of protein to the site of protein synthesis. (iii) rRNA (Ribosomal RNA) : PLAYS the structural and catalytic role during translation.

Discussion

11681.	Question : Name the three layers of the uterus.
Answer» SOLUTION :Perimetrium, MYOMETRIUM and ENDOMETRIUM.

Discussion

11682.	Question : Name the three important components of biodiversity.
Answer» SOLUTION :GENETIC DIVERSITY, SPECIES diversity and ECOLOGICAL diversity.

Discussion

11683.	Question : Name the theory which attempts to explain 'origin of universe'.
Answer» SOLUTION : BIG BANG THEORY.

Discussion

11684.	Question : Name the theory of evolution that supports industrial melanism in insects.
Answer» ANSWER :DARWINISM

Discussion

11685.	Question : Name the first test tube baby produced in England.
Answer» ANSWER :LOUSE JOY BROWN

Discussion

11686.	Question : Name the term for the transmission of HIV from pregnant mother to foetus.
Answer» Solution :TRANSMISSION of HIV from pregnant mother to FOETUS is called TRANSPLACENTAL.

Discussion

11687.	Question : Name the term for the increase in the amount non-biodegradable pollutant in successive trophic level in a food chain.
Answer» ANSWER :A::B::C

Discussion

11688.	Question : Name the term for arrangement of different types of teeth in mammals.
Answer» ANSWER :DENTITION

Discussion

11689.	Question : Name the term for pre-natal diagnostic technique aimed to know the sex developing foetus and congenital disorder.
Answer» ANSWER :AMNIOCENTOSIS

Discussion

11690.	Question : Name a technology that has successfully increased herd size of cattle in a short time.
Answer» SOLUTION :MOET (Multiple Ovulation and Embryo Transfer) Steps: (a) It is used to improve chances of successful production of hybrids. (b) Cow is administered hormones with FSH-like activity, which induce follicular maturation and super ovulation (C) Production of 6-8 eggs instead of one egg per cycle. (d) The female is either mated with an elite bull or artificially inseminated. (E) Non-surgical recovery of fertilized eggs at 8-32 cells stages. (f) Each one transferred to surrogate mother. (g) The GENETIC mother is available for another round of super ovulation.

Discussion

11691.	Question : Name the technology that can successfully increase the herd size of cattle in a short time and explain the steps involved in the technology
Answer» Solution :MOET (MULTIPLE Ovulation and Embryo TRANSFER) Steps: (a) It is USED to improve chances of successful production of hybrids. (b) Cow is administered hormones with FSH-like activity, which induce follicular maturation and SUPER ovulation (c) Production of 6-8 eggs instead of one egg per cycle. (d) The female is either mated with an elite BULL or artificially inseminated. (e) Non-surgical recovery of fertilized eggs at 8-32 cells stages. (f) Each one transferred to surrogate mother. (g) The genetic mother is available for another round of super ovulation.

Discussion

11692.	Question : Name the technique used to prevent the attack of nematode in root of tobacco plants.
Answer» ANSWER :RNA INTERFERENCE

Discussion

11693.	Question : Name the technique and the property of plant cells that can help to grow somaclones of certain desired varitey of apple. Explain how somaclones of apple can be obtained in the lab so as to get the desired variety on a large scale.
Answer» Solution :Tissue culture or micropropagation is used which utilizes totipotency to grow somaclones of certain desired VARIETIES of apples in short period of TIME. A specific tissue of desired varieties is chosen and grown invitro under sterile conditions to give callus. Callus is cut into small parts taken in different TEST tubes added with specific phyto-hormones. Roots and shoots grows after few DAYS. Plants after few WEEKS of hardening process get ready to be planted in field.

Discussion

11694.	Question : name the technique other than microsocopy used for the study of the cell.
Answer» Obliteration Plasmolysis Flow cytometry None of these Answer :C

Discussion

11695.	Question : Name the technique to know genetic disorder of the foetus.
Answer» ANSWER :AMNIOCENTESIS

Discussion

11696.	Question : Name the technique based on the principal of antigen-antibody interaction used in detection of virus(HIV).
Answer» ANSWER :ELISA( ENZYME kinkes immouno-sorbent ASSAY)

Discussion

11697.	Question : Name the substance present in the semen which causes contractions of female reproductive tract at the time of fertilization?
Answer» Solution :Prostaglandin is the substance present in the semen which causes CONTRACTIONS of female reproductive tract at the TIME of fertilization.

Discussion

11698.	Question : Name the study that deals with soil factors. Also mention the optimal soil pH for crop cultivation.
Answer» Solution :The STUDY of soil is CALLED PEDOLOGY. The best PH of soil for crop cultivation is 5.5 to 6.8.

Discussion

11699.	Question : Name the structures formed at the end of these two events.
Answer» SOLUTION :Each MICROSPORE produces a haploid male gametophyte or 2 celled pollen grain. Single functional megaspore produces a haploid 7 celled 8 nucleate embryo sac or female gametophyte.

Discussion

11700.	Question : Which structure connects testis of man to the wall of scrotalsac ?
Answer» ANSWER :INGUINAL CORD/Spermatic cord

Discussion

Explore topic-wise InterviewSolutions in .

Question : Name the two types of maps generated by HGP.

Question :Name the two types of immune systems in a human body. Why are cell mediated and humoral immunities so called

Question : Name the two types of food chain.

Question : Name the two type of nutrient cycles with an example each.

Question : Name the two sugar cane varieties which were successfully cronsed to produce high yielding sugar cane varieties

Question : Name the strategies used in gene therapy .

Question : Name the two Primates those were existingin 15mya.

Question : Name the two postero-lateral tissues present in the penis.

Question : Name the two plants where remnants of nucellus can be found in the seed.

Question : Name the two pollutants that undergo biomagnification.

Question : Name the two initiating codons

Question : Name the two major groups of cells required in attaining specific immunity.

Question : Name the two inherent capacity responsible for cellular totipotency.

Question : Name the two gases contributing maximum to the green house effect.

Question : Name two hormone releasing IUD's.

Question : Name the two geographic zones in Tamilnadu.

Question :Name the two categoris of fruits and give one example of each.

Question : Name the two classes to which Archaeopteryx acts as connecting link.

Question : mention the general names for organism that are also called as secondary and tertiary consumers.

Question : Name the triplet codons that code for (a) Tyrosine (b) Histidine

Question : Name the transcriptionally active region of chromatin in a nucleus.

Question : Name the toxic protein secreted by Bacillus thuringiensis.

Question : Name the tools of recombinant DNA technology. Write a note on restriction enzymes,

Question : Name the three types of silk obtained from silkworm.

Question : Name the types of ecological factors.

Question : Name the three sulci present on the cerebral hemispheres.

Question : Name the three steps of PCR technique in proper sequence.

Question : Name the three RNA polymerases found in eukaryotic cells and mention their functions.

Question : Name the three primary germ layers of embryo. Also mention any three organs or organ systems developing from each layer.

Question : Name the three major types of RNAs, specifying the function of each in the synthesis of Polypeptiede.

Question : Name the three layers of the uterus.

Question : Name the three important components of biodiversity.

Question : Name the theory which attempts to explain 'origin of universe'.

Question : Name the theory of evolution that supports industrial melanism in insects.

Question : Name the first test tube baby produced in England.

Question : Name the term for the transmission of HIV from pregnant mother to foetus.

Question : Name the term for the increase in the amount non-biodegradable pollutant in successive trophic level in a food chain.

Question : Name the term for arrangement of different types of teeth in mammals.

Question : Name the term for pre-natal diagnostic technique aimed to know the sex developing foetus and congenital disorder.

Question : Name a technology that has successfully increased herd size of cattle in a short time.

Question : Name the technology that can successfully increase the herd size of cattle in a short time and explain the steps involved in the technology

Question : Name the technique used to prevent the attack of nematode in root of tobacco plants.

Question : Name the technique and the property of plant cells that can help to grow somaclones of certain desired varitey of apple. Explain how somaclones of apple can be obtained in the lab so as to get the desired variety on a large scale.

Question : name the technique other than microsocopy used for the study of the cell.

Question : Name the technique to know genetic disorder of the foetus.

Question : Name the technique based on the principal of antigen-antibody interaction used in detection of virus(HIV).

Question : Name the substance present in the semen which causes contractions of female reproductive tract at the time of fertilization?

Question : Name the study that deals with soil factors. Also mention the optimal soil pH for crop cultivation.

Question : Name the structures formed at the end of these two events.

Question : Which structure connects testis of man to the wall of scrotalsac ?