24277 + Interview Questions in Biology in Class 12 Page 400 InterviewSolution

19951.	Question : Carbonic anhydrase is present in W.B.Cs.
Answer» True False Answer :R.B.Cs

Discussion

19952.	Question : Carbonic anhydrase is mostly active in
Answer» RBC WBC Blood plasma Blood platelets Answer :A

Discussion

19953.	Question : Carbonic anhydrase helps in the formation of
Answer» carbamino-haemoglobin oxyhaemoglobin carbonic acid more on Answer :C

Discussion

19954.	Question : Carbon monoxide kills because it destroys:
Answer» Haemoglobin Phytochrome Cytochrome Both (a) and (B) ANSWER :A

Discussion

19955.	Question : Carbon sequestration occurs naturally by plants and oceans. Name any four microalgal species involved in the process.
Answer» SOLUTION :(a) CHLORELLA (B) Scenedesmus (C) Chroococcus . (d) CHLAMYDOMONAS

Discussion

19956.	Question : Carbon is absorbed by the plant as_______from the air.
Answer» ANSWER :`CO_2`

Discussion

19957.	Question : Carbon dioxide is the major limiting factor for photosynthesis. With respect to this . choose the correct Statement from the following.
Answer» Crops LIKE tomato and bell pepper use increased levels of `CO_2`for higher productivity and are hence called GREENHOUSE crops. The current availability of `CO_2`levels is LIMITING to `C_4`plants . `C_4`plants show saturation at about `450ppm`while `C_3`responds to increased `CO_2`concentration and saturation is SEEN only beyond `360 PPM`. Increase in concentration up to 0.03 per cent can cause an increases in `CO_2` fixation rates. Answer :A

Discussion

19958.	Question : Carbon dioxide is considered a harmful by-product of cellular respiration because it
Answer» LOWERS the HYDROGEN ION concentration in the blood combines with HAEMOGLOBIN to form carboxyhaemoglobin has more AFFINITY for haemoglobin lowers the pH of the blood Answer :D

Discussion

19959.	Question : Carbon dioxide entering erythrcicytes react with water to form carbonic acid. The enzyme is:
Answer» CARBONIC anhydrase Carboxypeptidase Hydrolase Oxydoreductase Answer :A

Discussion

19960.	Question : Carbon dioxide (CO) diffuses into blood from tissue site and passes to alveolar site in the form of
Answer» BICARBONATE: 70% bicarbonate: 20-25% CARBAMINO haemoglobin: 60-70% carbamino haemoglobin: 7% ANSWER :A

Discussion

19961.	Question : Carbon cycle .
Answer» SOLUTION :

Discussion

19962.	Question : Carbon dioxide added by biomass burning is
Answer» 0.8 0.6 0.4 0.25 Answer :C

Discussion

19963.	Question : Carbon and energyrequirements of autotrophic organisms are fulfilled by :
Answer» Photosynthesis GLUCONEOGENESIS Glycogenesis External SOURCES Solution :Photosynthesis is a processin which CARBON is taken from the ATMOSPHERE is taken in formof carbon di oxide. Energyis alsosynthesized in lightreactionis subsequent STEPS.

Discussion

19964.	Question : Carbomycin, bacitracin and fumagillin are(A) Vaccines(B) Antibiotics(C) Alcohol(D)Steroids
Answer» Vaccines ANTIBIOTICS Alcohol Steroids SOLUTION :Antibiotics

Discussion

19965.	Question : Carbohydrates are commonly found as starch in plant storage organ . Which of the following five properties of starch (i-v) make it useful as a storage material ? (i) easily translocated(ii) chemically non-reactive(iii)easily digested by animals(iv) osmotically inactive(v) synthesized during photosynthesis The useful properties-are:
Answer» (i), (III) and (V) (i) and (v) (II) and(iii) (ii) and (IV) ANSWER :D

Discussion

19966.	Question : captulum infloresecence does not occur in
Answer» DAHLIA sunflower marigold CHINA rose Answer :d

Discussion

19967.	Question : Capillary pressure in the glomeruli
Answer» is lower than pressure in the efferent ARTERIOLES rises when the alfferent arterioles constric is higher than other CAPILLARIES in the body is reduced by about 10% when ARTERIAL pressure lalls 10% below the normal level Answer :C

Discussion

19968.	Question : Capping and tailing are seen during the transcription of RNA.a. How is this process done? b. What is the use of this process?
Answer» Solution :a. Capping is DONE by adding a methylated GUANOSINE at the 5. end. TAILING is done by adding 200-300 adenylate residues at the 3. end. b. Capping and tailing are used to process the hnRNA. The fully processed hnRNA is called MRNA.

Discussion

19969.	Question : Capping of mRNA occurs using …………………..
Answer» (a) POLY A RESIDUES (b) METHYL GUANOSINE triphosphate (c) Deoxy ribonucleotide triphosphate (d) Ribonucleotide triphosphate Solution :Methyl guanosine triphosphate

Discussion

19970.	Question : Capacity of stem and root to orient themselves with regard to the force of gravity.
Answer» ANSWER :GEOTROPISM

Discussion

19971.	Question : Capacity of lungs for air in the healthy man is :
Answer» 3000 ml 1500 ml 6000 ml 10000 ml Answer :C

Discussion

19972.	Question : Capacity of a plant cell to give rise to whole plant body is known as
Answer» REPRODUCTION Budding Totipotency Regeneration Answer :C

Discussion

19973.	Question : Capacitation of sperm is provided by
Answer» Urethra VAS deferens VAGINA Seminal VESICLE Answer :C

Discussion

19974.	Question : Canner cells are damaged by radiations while others are not due to cancer cells
Answer» Being starved Being DIFFERENT in nature Immature and UNDERGOING RAPID division None of the above Answer :C

Discussion

19975.	Question : Capacitation refers to changes in the
Answer» SPERM before fertilization ovum before fertilization ovum after fertilization sperm after fertilization Answer :A

Discussion

19976.	Question : Capacitation occurs in
Answer» FEMALE REPRODUCTIVE Tract Rete testis Epididymis Vas deferens Answer :A

Discussion

19977.	Question : Cancerous cells spread through
Answer» Blood Lymph Secondary GROWTHS of MALIGNANT tumour All the above Answer :D

Discussion

19978.	Question : Cannabinoids are product of tea plant.
Answer» True False Answer :HEMP PLANT

Discussion

19979.	Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe.
Answer» Solution :CHEMOTHERAPY, lmmunotherapy, radioactive and SURGICAL METHODS are some of the treatment methods.

Discussion

19980.	Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe. What are the methods for detection of cancer?
Answer» Solution :ENDOSCOPY, Biopsy, CT Scan, US Scan, MRI Scan are some of the methods to DETECT CANCER.

Discussion

19981.	Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe. What are the causes of cancer?
Answer» Solution :Cancer is caused due to the activation of ONCOGENES. The fectors which cause cancer are CALLED CARCINOGENS. Example for carcinogens are X-rays, ionising radistions, chemicals like FORMALIN, etc.

Discussion

19982.	Question : Cancer developing in lymphglands and lymoh nodes are called what ?
Answer» ANSWER :LYMPHOMA

Discussion

19983.	Question : Cancer causing genes are called
Answer» STRUCTURAL GENES expressor genes oncogenes REGULATORY genes Solution :Oncogenes causes CANCER. Structural genes, Expressor genes and regulatory genes are genes of lac operon.

Discussion

19984.	Question : Cancer cells are more easily damaged by radiation than normal cells because they are
Answer» STARVED of mutation UNDERGOING RAPID DIVISION Different in structure Non-dividing Solution :Undergoing rapid division

Discussion

19985.	Question :Cancer can be cured completely by using chemotherapy. a. Is this statement true? b. What is chemotherapy? c. Name any other five types of treatment against cancer.
Answer» Solution :a. YES b: Treatment of a disease by MEDICINE c. i. Surgery ii. Radiation therapy iii. CHEMOTHERAPY iv. HORMONE therapy V. Immuno therapy

Discussion

19986.	Question : Cancer
Answer» Solution :(1)Cancer is caused due to uncontrolled GROWTH of CELLS and unregulated cell division causing growth of tumours.(2)Tumours can be benign or malignant cells are able to show metastasis.Tumours interfere with other normal organs.(3)Symptoms of cnacer are many and varied,dep[ending upon the location of cnacer and the exent of metastasis.(4)There are five TYPE of cancer,viz,CARCINOMA,sarcoma,lymphoma,leukemia and adenoma.(5)Treatment of cancer is usually combination of surgery,RADIATIONS and chemotherapy.The early diagnosis and treatment can cure cancer completely.

Discussion

19987.	Question : cancel(square) In pedigree analysis this symbol indicates
Answer» AFFECTED male Carrier Aborted male Male DIED after birth Answer :D

Discussion

19988.	Question : Canal systems are seen in :
Answer» SEA urchin Hydra Sea anemone Sponges Answer :D

Discussion

19989.	Question : Canal system in sponges helps in
Answer» EXCRETION RESPIRATION CIRCULATION All of these Answer :D

Discussion

19990.	Question : Can you think of a situation where we deliberately want to make a species extinct ? How would you justify it ?
Answer» Solution :Yes, these are various KINDS of parasites and disease causing microbes that we deliberately WANT to eradicate from the Earth. SINCE these micro organisms are harmful to human beings scientists are working hard to fight against them. Scientists have been able to eliminate smallpox virus from the world through the use of vaccinations. This SHOWS that HUMANS deliberately want to make these species extinct. Several other eradication programmes such as polio and hepatitis B vaccinations are aimed to eliminate these disease causing microbes.

Discussion

19991.	Question : Can you think of a situation where we deleberately want to make a species extinct?How would you justify it?
Answer» SOLUTION :When a species is DANGEROUSLY harmful to us.e.g.,HIV,POLIO VIRUS,etc.We can think of deliberate extinction.pathogens are not part of any food chain.They are aso not components of any decomposer system.Their extinction will not affect ecosystem in anyway.

Discussion

19992.	Question : Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?
Answer» Solution :If a particular species is extinct DUE to any activity, it will affect the existence of other related plants and ANIMALS. For eg. RELATIONSHIP between Calvaria tree and DODO.

Discussion

19993.	Question : Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker ?
Answer» Solution :Alternative selectable marker separates Alternative TRANSFORMED and non - transformed molecules on the basis of their COLOUR like recombinant DNA is inserted with the coding sequence of an ENZYME, `beta` galactosidase. This results into inactivation of the gene for synthesis of enzyme, which is referred to as INSERTIONAL inactivation.

Discussion

19994.	Question : Can you think and answer how can a reporter enzyme be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker?
Answer» SOLUTION :Reporter enzyme can be used to IDENTIFY transformed cells out of nontransformed BACTERIAL cells. Nontransformed bacterial cells have active lac-Z gene and can produce `beta` -galactosidase enzyme. They produce blue colonies in lactose rich culture medium. fn transformed bacterial cels, lac-Z gene is inactivated by recombinant DNA. Colony of such BACTERIA remains COLOURLESS because their lac-Z gene does not produce `beta` -galactosidase.

Discussion

19995.	Question : Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct relationship between diversity and stability of an ecosystem ?
Answer» Solution :David Tilman.s long-term ecosystem experiments using outdoor plots provide some tentative answers. Tilman found that plots with more species SHOWED less year-to-year variation in total biomass. He ALSO showed that in his experiments, increased diversity contributed to higher productivity. Although, we may not understand COMPLETELY how species richness CONTRIBUTES to the well-being of an ecosystem, we know enough to realise that rich biodiversity is not only essential for ecosystem health but imperative for the very survival of the human RACE on this planet.

Discussion

19996.	Question : Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition being a selectable marker?
Answer» Solution :Alternative selectable markers have been developed which the DIFFERENTIATE recombinants and non-recombinants on the basis of colour production on the PRESENCE of chromogenic SUBSTRATE. A alien DNA is inserted in the coding sequences of an ENZYME `beta`-galactorisedase. This CAUSES inactivation of an enzyme, i.e., insertional inactivation. The colonies of the baceria produced are colourless and are called as recombinant. Bacteria colonies whose plasmids do not have an insert the presene of chromogenic substrate gives bluish coloured colonies, which are non-recombinants.

Discussion

19997.	Question : Can you suggest a method to remove oil (hdrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
Answer» SOLUTION :It is the nature of ftty ACIDS that determines the uniqueness of the oil in each plant. Most of the oils contain oils we can construct a RECOMBINANT BACTERIA that can synthesize these oils, and extract from them.

Discussion

19998.	Question : Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil ?
Answer» Solution :Oil is a LIPID. There is one molecule of glycerol and three molecules of FATTY acid PRESENT in its constitution. Thus to remove oil from seed Lipase enzyme can be used. By introducing gene PRODUCING Lipase, oil can be removed.

Discussion

19999.	Question : Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of r DNA technology and chemistry of oil?
Answer» Solution :OIL is a lipid synthesized by the condensation of one MOLECULE of glycerol and three molecules of fatty ACIDS. Thus the oil from the seeds can be removed by PREVENTING the syntheis of either glycerol or the enzyme lipsase which catalyses the synthesis of oil. It can beachieved by non-functioning the genes coding for the enzyme lipase or the enzyme required for the synthesis of glycerol.

Discussion

20000.	Question :Can you suggest a method to extract oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?
Answer» Solution : Oilless SEEDS from oil-yielding plants can be OBTAINED using rDNA technology. In plants, oil is synthesised by the condensation of three fatty acids with one molecule of glycerol. An enzyme COMPLEX of fatty acid synthetases is needed for the synthesis of fatty acids (a) Identify the GENE/genes associated with the synthesis of fatty acid synthetase. (b) Using restriction enzyme remove these genes from the genome of the cells of oil plant. (c) Culture the cells which are without fatty acid synthetase gene. (d) The plants developed from such cells will bear seeds DEVOID of fatty acids and oil using rDNA technology, gene for productivity of oil is introduced into the oil plants.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Carbonic anhydrase is present in W.B.Cs.

Question : Carbonic anhydrase is mostly active in

Question : Carbonic anhydrase helps in the formation of

Question : Carbon monoxide kills because it destroys:

Question : Carbon sequestration occurs naturally by plants and oceans. Name any four microalgal species involved in the process.

Question : Carbon is absorbed by the plant as_______from the air.

Question : Carbon dioxide is the major limiting factor for photosynthesis. With respect to this . choose the correct Statement from the following.

Question : Carbon dioxide is considered a harmful by-product of cellular respiration because it

Question : Carbon dioxide entering erythrcicytes react with water to form carbonic acid. The enzyme is:

Question : Carbon dioxide (CO) diffuses into blood from tissue site and passes to alveolar site in the form of

Question : Carbon cycle .

Question : Carbon dioxide added by biomass burning is

Question : Carbon and energyrequirements of autotrophic organisms are fulfilled by :

Question : Carbomycin, bacitracin and fumagillin are(A) Vaccines(B) Antibiotics(C) Alcohol(D)Steroids

Question : captulum infloresecence does not occur in

Question : Capillary pressure in the glomeruli

Question : Capping and tailing are seen during the transcription of RNA.a. How is this process done? b. What is the use of this process?

Question : Capping of mRNA occurs using …………………..

Question : Capacity of stem and root to orient themselves with regard to the force of gravity.

Question : Capacity of lungs for air in the healthy man is :

Question : Capacity of a plant cell to give rise to whole plant body is known as

Question : Capacitation of sperm is provided by

Question : Canner cells are damaged by radiations while others are not due to cancer cells

Question : Capacitation refers to changes in the

Question : Capacitation occurs in

Question : Cancerous cells spread through

Question : Cannabinoids are product of tea plant.

Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe.

Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe. What are the methods for detection of cancer?

Question : Cancer is one of the most dreaded diseases of human beings and is a major concern of death all over the globe. What are the causes of cancer?

Question : Cancer developing in lymphglands and lymoh nodes are called what ?

Question : Cancer causing genes are called

Question : Cancer cells are more easily damaged by radiation than normal cells because they are

Question :Cancer can be cured completely by using chemotherapy. a. Is this statement true? b. What is chemotherapy? c. Name any other five types of treatment against cancer.

Question : Cancer

Question : cancel(square) In pedigree analysis this symbol indicates

Question : Canal systems are seen in :

Question : Canal system in sponges helps in

Question : Can you think of a situation where we deliberately want to make a species extinct ? How would you justify it ?

Question : Can you think of a situation where we deleberately want to make a species extinct?How would you justify it?

Question : Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

Question : Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker ?

Question : Can you think and answer how can a reporter enzyme be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker?

Question : Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct relationship between diversity and stability of an ecosystem ?

Question : Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition being a selectable marker?

Question : Can you suggest a method to remove oil (hdrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?

Question : Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil ?

Question : Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of r DNA technology and chemistry of oil?

Question :Can you suggest a method to extract oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?