4951 + Interview Questions in Biology in Class 10 Page 83 InterviewSolution

4101.	Question : Carcinogens are cancer causing agents.
Answer» ANSWER :TRUE

Discussion

4102.	Question : Carbon monoxide has greater affinity for he moglobin as compared to oxygen
Answer» 1000 TIMES 200 times 20 times 2 times ANSWER :B

Discussion

4103.	Question : Carbon monoxide is a pollutant because it
Answer» inhibits GLYCOLYSIS COMBINES with haemoglobin INACTIVATES nerves combines with oxygen ANSWER :B

Discussion

4104.	Question : Carbon monoxide binds morestrongly to haemoglobini than oxygen.
Answer» ANSWER :T

Discussion

4105.	Question : Carbon dioxide in atmospheric air amounts to about
Answer» 0.03 PER CENT 0.003 per cent 0.3 per cent 3 per cent ANSWER :A

Discussion

4106.	Question : (i) Carbon atom does not form C^(4-) anion and C^(4+) cation. Why ? (ii) How can ethanol be converted into ethanoic acid?
Answer» Solution :Carbon can gain four clectrons. But it would be difficult for the nucleus with six protons to HOLD on to ten clectrons, tlhat is LOUR EXTRA electrons. It can lose four electrons but it would require a large amount of energy to remove four electrons leaving belhind a carbon calion with SIX protons in its nucleus holding on to just two eleetrons. Alkaline potassium permangnate or acidified potassium dichromate is added to ethyl alcohol. When it is heated it oxidises to fomr ethanoie acid. `CH_(3)- CH_(2)-OH underset("AciditK"_(2)Cr_(2)O_(7)+"Heat")overset("Basic KmnO4+Heat")rarr CH_(3)COOH`

Discussion

4107.	Question : Cancer of the epithelial cells is called
Answer» LEUKEMIA Sarcoma CARCINOMA Lipoma Solution :Carcinoma

Discussion

4108.	Question : Cancer cells are more easily damaged by radiations than normal cells because they are
Answer» DIFFERENT in structure Non-dividing Mutated Cells UNDERGOING RAPID DIVISION Solution :Undergoing rapid division

Discussion

4109.	Question : Cancer causing genes are called Oncogenes.
Answer» ANSWER :TRUE

Discussion

4110.	Question : Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration ?
Answer» Solution :Complex organism have division of labour in their body, to AVOID DUPLICATION of efforts. Thus they have specialised ORGANS to perform specific functions. Through regeneration, it will not ALWAYS be possible to differentiate in all types of cells. Thus, more complex organisms use more complex ways of reproduction.

Discussion

4111.	Question : Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Answer» Solution :More complex organisms cannot reproduce by regeneration process because: (i) their body is highly complicated, (ii) there are specific organs to do specific functions, (III) there is a division of LABOUR in the body of complex organisms, (iv) regeneration is carried out by SPECIALISED CELLS, which are not present in complex organisms.

Discussion

4112.	Question : Can you suggest some changes in your school which would make it environmentfriendly?
Answer» Solution :A SCHOOL can BECOME environment-friendlyby following ways: (1) Growing plants and trees all around the PLAY ground. (2) Making a rainwater harvesting system. ( 3 ) Arranging solar cell pannel if POSSIBLE. (4) Making compost of BIOMASS waste collected e.g., food waste, fallen leaves, etc.

Discussion

4113.	Question : Can you name different products generated by the following life processes ?
Answer» SOLUTION :

Discussion

4114.	Question :Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.
Answer» Solution :YES, because it RESULTS in the formation of two daughter cells, i.e, it results in the PRODUCTION of more individuals of the ORGANISM.

Discussion

4115.	Question : Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.
Answer» SOLUTION :YES, because it RESULTS in the formation of two daughter CELLS, i.e., it results in the production of more INDIVIDUALS of the organism.

Discussion

4116.	Question : Can we say that grafting is not useful for agriculture ?
Answer» ANSWER :No

Discussion

4117.	Question : Can we call these sources of energy ? Why or why not ?
Answer» SOLUTION :YES, we can CALL all these as SOURCES of ENERGY.

Discussion

4118.	Question : Can the wing of butterfly and the wing of a bat be considered homologous organs? Why or why not?
Answer» Solution :The wings of a BUTTERFLY and the wings of a bat cannot be considered as HOMOLOGOUS organs because they have different basic designs EVEN though they perform similar functions, they are therefore regarded as analogous organs.

Discussion

4119.	Question : Can the wing of a butterfly and the wing of a bat be considered homologous organs ? Why or why not ?
Answer» SOLUTION :Out of SYLLABUS.

Discussion

4120.	Question : Can changes in non-reproductive tissue pass on to next generation ?
Answer» SOLUTION :No, because they cannot PASS on to the DNA of GERM CELLS.

Discussion

4121.	Question : Can asexually reproducing organisms follow similar rules of inheritance ? Why ?
Answer» Solution :No, because single parent is involved in it and NORMAL TWO copies of GENES are inherited of parent. [In bacteria, few algae, FUNGI and BRYOPHYTES have only single set of genes in their normal body cells.]

Discussion

4122.	Question : Can any source of energy be pollution free ? Why or why not ?
Answer» Solution :SOLAR energy, wind energy, GEOTHERMAL energy, ETC. are considered as POLLUTION FREE. But every time a source of energy is exploited or used, it causes envirnomental pollution. So, no source of energy can be pollution free.

Discussion

4123.	Question : Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Answer» Solution :No. A WING of a butterfly and wing of a bat can.t be considered HOMOLOGOUS organs because wings of a bat are skin folds in between the fingers and wings of a butterfly are membrane SUPPORTED by muscles. They are ANALOGOUS organs.

Discussion

4124.	Question : Call wall is found only in ------------- cells.
Answer» Animal Plant Both A and B None of the Above Answer :B

Discussion

4125.	Question : Calcium metabolism of the body is controlled by ……..
Answer» SOLUTION :Parathomone

Discussion

4126.	Question : Calcium deficiency occurs in the absence of vitamin
Answer» D E C B Answer :A

Discussion

4127.	Question : Cadmium pollution is associated with disease
Answer» itai-itai ANAEMIA MINAMATA PNEUMOCONIOSIS ANSWER :A

Discussion

4128.	Question : Ca^(2+)level is controlled by
Answer» THYROXINE FSH PANCREAS THYROID and parathyroid Answer :D

Discussion

4129.	Question : (c) In which phase of interphase duplication of DNA will occur ?
Answer» SOLUTION :During A PHASE or SYNTHESIS phase.

Discussion

4130.	Question : By whom the number of organisms are limited at trophic level of food chain?a.Less availability of energy at higher tropic levelb.Sufficient food supplyc.Polluted aird.Water
Answer» Less aVailability of energy at higher tropic level SUFFICIENT FOOD SUPPLY Polluted AIR Water Solution :Less availability of energy at higher trophic level

Discussion

4131.	Question : By which process roots absorb water ?
Answer» SOLUTION :OSMOSIS.

Discussion

4132.	Question : By which of the following greenhouse effect can be achieved in a solar cooker ?
Answer» BLACK surface CONCAVE MIRROR Convex mirror Covered GLASS plate Answer :A::C::D

Discussion

4133.	Question : By which agents is cross-pollination achieved ?
Answer» Solution :Cross-pollination is achieved by AGENTS LIKE wind, WATER or ANIMALS.

Discussion

4134.	Question : By processing on wastes of used product, new materials can be produced this process is known as ..........
Answer» SOLUTION :RECYCLING

Discussion

4135.	Question : By studying analogous structures we look for
Answer» Similarities in APPEARANCE and FUNCTION but different in STRUCTURE similarities in appearance but differences if function Similarities in organ structure Similarities in cell MAKE up Answer :A

Discussion

4136.	Question : Burning of fossil fuels is the main cause of
Answer» nitrogen OXIDE pollution nitrous oxide pollution SULPHUR dioxide pollution nitric oxide pollution Answer :C

Discussion

4137.	Question : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called
Answer» epimysium perimysium exomysium endomycium Answer :B

Discussion

4138.	Question : Bulk of the tooth in mammals is made up of
Answer» dentine enamel pulp cavity root ANSWER :A

Discussion

4139.	Question : Budh Ram and Sattoare husband and wife who live in a village. They already have two children in the form of two lovely daughters.During third pregnancy, Budh Ram and Satto went to a city clinic and, after paying a hefty bribe, got the pre-natal scan done on the foetus. After knowing the sex of foetus, they went to a famous lady doctor who specialises in gynaecology and requested her to carry out the medical termination of pregnancy. They offered her big money for doing this job. The lady doctor said a firm 'No'. When the couple insisted, the doctor threatened to call the police and get them arrested. (a) What type of scan was done to know the pre-natal (before birth) sex of foetus illegally ? (b) What do you think this scan showed ? (c ) Why did Budh Ram and Satto want to terminate this pregnancy ? (d) What term is used specifically for such type of termination of pregnancy ? (e) What values were displayed by the lady doctor ?
Answer» Solution :(a) An ultrasound scan was done to KNOW the sex of foetus. (b) The ultrasound scan showed that it was a female foetus. (c ) Budh Ram and Satto wanted to terminate this pregnancy so as to abort the female foetus (foetus of the girl child). This is because they wanted to try again for having a BOY child (or son). (d) Female foeticide. (e) The VALUES displayed by the lady doctor are : (i) Awareness (or knowledge) that it is aginst the law to abort a female foetus (foetus of the girl child). (ii) Concern for the girl child. (iii)Responsibility TOWARDS society (to maintain healthy child sex-ratio). (IV) Honesty (in not accepting bribe).

Discussion

4140.	Question : Bubbles of gases support masses of floating Spirogyra in a pond. The gas is
Answer» oxygen air carbon dioxide ethane ANSWER :A

Discussion

4141.	Question : Bt gene from bacteria can kill insects.
Answer» Solution :CORRECT STATEMENT: In vitro FERTILISATION means the fertilisation DONE outside the BODY.

Discussion

4142.	Question : Bryophytes do not have
Answer» gametophytes xylem or phloem sporophytes cuticle ANSWER :B

Discussion

4143.	Question : Bryophytes are dependent on water because
Answer» archegonium has to remain filled with water for FERTILISATION water is ESSENTIAL for fertilisation for ho mosporous nature water is essential for vegetative propaga tion the SPERMS can easily reach up to the egg in the archegonium ANSWER :D

Discussion

4144.	Question : Bryophyllum in nature is reproduced by :
Answer» Foliar ADVENTITIOUS BUDS SEEDS ROOTS NONE of these. Answer :A

Discussion

4145.	Question : Brunner's glands are present in the
Answer» stomach liver small INTESTINE large intestine ANSWER :C

Discussion

4146.	Question : Broccoli has been developed from …………………………….. by artificial selection.
Answer» ANSWER :WILD CABBAGE

Discussion

4147.	Question : Bring out any two physiological activities of abscisic acid (ABA).
Answer» Solution :(a) During water stress and drought CONDITIONS, Abscisic acid causes stomatal closure. (b) ABA INDUCES bud dormancy TOWARDS the APPROACH of winter in TREES like birch.

Discussion

4148.	Question : Briefly note down the prevention and control of AIDS.
Answer» SOLUTION :The following steps help in controlling and preventing the spreading of HIV: (i) Screening of blood from blood banks for HIV, before transfusion. (ii) Ensuring the use or disposable needles and syringes in hospitals and clinics. (iii) Advocating safe sex and advantages of USING condoms. (iv) Creating awareness campaign and educating PEOPLE on the consequences of AIDS. (v) PERSONS with HIV/AIDS should not be ISOLATED from the family and society.

Discussion

4149.	Question : For every calvin cycle
Answer» Solution :1) The reactions of photosynthesis which do not REQUIRE light energy are called dark reactions. These reactions occur both in presence and absence of light. 2) Dark reactions occur in the stroma of the chloroplast and these were discovered by American scientist Melvin CALVIN. 3) In the first reaction carbon DIOXIDE is accepted by Ribulose 1- 5 biphosphate, a five carbon sugar to form hexose sugar. 4) It is an unstable compound so it breaks down into two molecules of three carbon compounds called phospho glyceric acid (PGA). `CO_2` + Ribulose biphosphate `to` Unstable compoundUnstable hexose sugar `to` 2 PGA 6) Phospho glyceric acid undergoes a series of reactions and is converted to glyceraldehyde - 3 phosphate. NADPH and ATP produced in light reactions and used up at this stage. `2PGA underset("NADPH")overset("ATP")to` Glyceraldehyde 3 - phorphase 7) Two molecules of glyceraldehyde -3 phosphate combine together to form glucose molecule. 8) In the end glucose is converted into starch. Summary reaction : `CO_2` + Ribulose 1 -5 biphosphate `to` Hexose sugar Hexose sugar (6c) `to` 2 PGA (3c) PGA `to` glyceralde -3 phosphate glyceraldehyde -3 phosphate `to` glucose glucose `to` starch

Discussion

4150.	Question : Briefly describe the working mechanism of the human heart.
Answer» Solution : The circulation of blood in the body takes place due to the pumping action of the heart. The heart receives blood from the veins and pumps it into the arteries. This pumping action is caused by the alternate contraction and relaxation of the muscles of the heart. During relaxation, both the ATRIA (singular - atrium) get filled with blood. The left atrium gets filled with the oxygenated blood BROUGHT by pulmonary veins from the lungs while the right atrium with the deoxygenated blood brought by inferior vena cava and superior vena cava from different parts of the body. When atria contract, the biscuspid and tricuspid valves open. As a result of this, the oxygenated blood enters from the left atrium into the left ventricle while deoxygenated blood from the right atrium enters into the right ventricle. When the ventricles contract, the bicuspid and tricuspid valves get closed. Owing to this, the oxygenated blood from the left ventricle enters into the AORTA which supplies it to different parts of the body through its branches, while the deoxygenated blood from the right ventricle is carried to the lungs through pulmonary artery for PURIFICATION. From this, it is obvious that blood CIRCULATES in the body due to the pumping action of the heart.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Carcinogens are cancer causing agents.

Question : Carbon monoxide has greater affinity for he moglobin as compared to oxygen

Question : Carbon monoxide is a pollutant because it

Question : Carbon monoxide binds morestrongly to haemoglobini than oxygen.

Question : Carbon dioxide in atmospheric air amounts to about

Question : (i) Carbon atom does not form C^(4-) anion and C^(4+) cation. Why ? (ii) How can ethanol be converted into ethanoic acid?

Question : Cancer of the epithelial cells is called

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

Question : Cancer causing genes are called Oncogenes.

Question : Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration ?

Question : Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Question : Can you suggest some changes in your school which would make it environmentfriendly?

Question : Can you name different products generated by the following life processes ?

Question :Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.

Question : Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.

Question : Can we say that grafting is not useful for agriculture ?

Question : Can we call these sources of energy ? Why or why not ?

Question : Can the wing of butterfly and the wing of a bat be considered homologous organs? Why or why not?

Question : Can the wing of a butterfly and the wing of a bat be considered homologous organs ? Why or why not ?

Question : Can changes in non-reproductive tissue pass on to next generation ?

Question : Can asexually reproducing organisms follow similar rules of inheritance ? Why ?

Question : Can any source of energy be pollution free ? Why or why not ?

Question : Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?

Question : Call wall is found only in ------------- cells.

Question : Calcium metabolism of the body is controlled by ……..

Question : Calcium deficiency occurs in the absence of vitamin

Question : Cadmium pollution is associated with disease

Question : Ca^(2+)level is controlled by

Question : (c) In which phase of interphase duplication of DNA will occur ?

Question : By whom the number of organisms are limited at trophic level of food chain?a.Less availability of energy at higher tropic levelb.Sufficient food supplyc.Polluted aird.Water

Question : By which process roots absorb water ?

Question : By which of the following greenhouse effect can be achieved in a solar cooker ?

Question : By which agents is cross-pollination achieved ?

Question : By processing on wastes of used product, new materials can be produced this process is known as ..........

Question : By studying analogous structures we look for

Question : Burning of fossil fuels is the main cause of

Question : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called

Question : Bulk of the tooth in mammals is made up of

Question : Bubbles of gases support masses of floating Spirogyra in a pond. The gas is

Question : Bt gene from bacteria can kill insects.

Question : Bryophytes do not have

Question : Bryophytes are dependent on water because

Question : Bryophyllum in nature is reproduced by :

Question : Brunner's glands are present in the

Question : Broccoli has been developed from …………………………….. by artificial selection.

Question : Bring out any two physiological activities of abscisic acid (ABA).

Question : Briefly note down the prevention and control of AIDS.

Question : For every calvin cycle

Question : Briefly describe the working mechanism of the human heart.