4951 + Interview Questions in Biology in Class 10 Page 85 InterviewSolution

4201.	Question : "Bile juice does not contain any enzyme but is essential for digestion ." Justify the statement.
Answer» Solution :Bile is a YELLOWISH greenalkaline fluid secreted by liver. It contains bile pigments(bilirubin and biliverdin) and salts. Although it does not contain any digestive ENZYME but is still ESSENTIAL due to following reasons : (1)Bile neutralisesthe acidity of CHYME and protectsthe duodenal wall from corrosion. (2)Itmakes the food alkaline for the action of pancreatic juice. (3)It breaksdown complex FAT into finesmall globules fortheaction of lipaseof pancreaticjuice. Breakingof fatinto fine small globules is referredas emulsification.

Discussion

4202.	Question : Biceps branchii and triceps branchii are
Answer» ANTAGONISTIC MUSCLES adductors abductors complementary muscles Answer :A

Discussion

4203.	Question : Bhushan noticed that his sister Seema had developed swollen neck. Being a science student of class 10, Bhushan knew the reason that causes the neck of a person to swell up. Bhushan asked his mother which type of common salt she purchases from the market for cooking food. The mother told Bhushan that she never checked the brand or contents of the common salt packet. She purchased whatever common salt shopkeeper gave her. Bhushan then went to the market himself and purchased a special type of common salt. He asked his mother to always use this salt in preparing food for the whole family. When Bhushan's sister was taken to a doctor, he confirmed what Bhushan had in mind. The doctor also advised his sister and everyone else in the family to use a special type of salt to prevent such a condition. (a) Name the disease which Seema is suffering from ? (b) What causes this disease ? (c ) Which part of endocrine system is involved in this disease ? What happens to this part during the occurrence of this disease ? (d) What type of salt was recommended by Bhushan and doctor for the whole family ? Why was this salt recommended ? (e) Why does this disease occur more in hilly areas but not at all in coastal areas ? (f) Wha values are displayed by Bhusan in this episode ?
Answer» SOLUTION :(a) Seema is suffering from a disease called 'goitre'. (b) Goitre gland of the endocrine system is involved in this disease. Due to the deficiency of iodine in the diet, thyroid gland is not able to make sufficient amount of iodine-containing hormone called 'thyroxine'. And due to the deficiency of thyroxine hormone, thyroid gland present in the neck of Seema ENLARGES too much, causing the neck to swell too much. (d) BHUSHAN and the doctor both recommended iodised common SALT or iodised salt (which contains an appropriate amount of iodine mineral). This was done to make up for the deficiency of iodine (and that of thyroxine hormone) in the body to prevent goitre. (e) Goitre disease occurs more in hilly areas because the soil (in which food is grown), and water in hilly areas is deficient in iodine mineral. Goitre disease does not occur at all in coastal areas (or sea-side areas) because the people of coastal areas eat a lot of sea food (sea fish, etc.) which contains a good amount of iodine. (f) The values displayed by Bhushan in this episode are (i) Awareness (or knowledge) that goitre disease develops due to the deficiency of iodine in the diet and can be prevented by USING iodised salt, and (ii) Concern to protect his family goitre disease by using iodised salt in cooking food.

Discussion

4204.	Question : Besides water, name any two main components of human sweat.
Answer» Solution :SODIUM CHLORIDE, lactic acid, GLUCOSE (any two).

Discussion

4205.	Question : Besides giving out secretory vesicles the golgi complex is also concerned with the formation of
Answer» lysosomes plastids grana of chloroplast CELL PLATES during cell division Solution :N/A

Discussion

4206.	Question : Besides blood, there's another fluid connective tissue in our body called lymph. Describe briefly.
Answer» SOLUTION :Lymph is a light yellow viscousfluid which is formed by PASSAGE of some fluid from blood capillaries into intercellular spaces in the tissuesthrough the pores presentin the walls of capillaries. Lymph is similar to the plasma of bloodbut contains very less protein . Lymph is specialised to collect tissue secretions whichcannot pass directly intoblood e.g., hormones, plasma, PROTEINS form liver, fats formintestine. It also carrieswaste productsand drains EXCESS fluid from extra cellular space back into the blood.

Discussion

4207.	Question : Besdes calcium phosphate the bones contain
Answer» CALCIUM chloride magnesium carbonate sodium chloride magnesium phosphate Answer :D

Discussion

4208.	Question : Benign malaria is caused by
Answer» PLASMODIUM vivax Plasmodium falciparum Plasmodium malariae none of the above ANSWER :C

Discussion

4209.	Question : Bending of growing shoot towards sunlight is called
Answer» heliotropism hydrotropism photonasty phototropism Answer :D

Discussion

4210.	Question : Behaviour that involves an external stimulus triggering a genetically determined response is called
Answer» innate learned conditioned imprinted Answer :A

Discussion

4211.	Question : Because most of the amino acids are represented by more than one codons, the genetic code is said to be
Answer» deaminated comma LESS DEGENERATE overlapping Answer :C

Discussion

4212.	Question : BCG vaccine provides protection from
Answer» EMPHYSEMA pneumonia polio tuberculosis Answer :D

Discussion

4213.	Question : Basic unit of plasma membrane is
Answer» CELLULOSE and CARBOHYDRATE PROTEIN and PHOSPHOLIPID protein and cellulose protein and carbohydrate SOLUTION :N/A

Discussion

4214.	Question :Basic idea of organic evolution is
Answer» COSMIC evolution descent with modification special creation spontaneous generation Answer :B

Discussion

4215.	Question : Basic functional unit of human kidney is
Answer» HENLE's loop Nephridia Nephron Pyramids Answer :C

Discussion

4216.	Question : Based on the given model, make a suitable piair from the following box: Model Charles Darwin - The theory of natural selection
Answer» Answer :Genome - The COMPLETE genetic MATERIAL present in an ORGANISM.

Discussion

4217.	Question : Based on the air pollution, water pollution and soil pollution, complete the following chart.
Answer» SOLUTION :

Discussion

4218.	Question : Based on given diagram, answer the following questions a] Label the parts A, B, C,D. b] Name the hormone secreted by testis and mention its role. c] State the function of B and C in the process of reproduction.
Answer» Solution :a] A: URETER, B: Seminal vesicle, C: Urethra, D: Vas deferens b] Testosterone: helps in secondary sexual development and formation of male gametes. c] Seminal vesicle: glands like seminal vesicles add their SECRETIONS which make transport of sperms easier and this fluid also provides nutrition. d] Urethra: In males, it has the ADDITIONAL function of ejaculating semen.

Discussion

4219.	Question : Barr body represents
Answer» heterochromatin in male and female CELLS one of the TWO X-chromosomes in SOMATIC cells of female Y-chromosome in somatic cells all hetrochromatin in female cells Answer :B

Discussion

4220.	Question : "Barr body" is derived from
Answer» AUTOSOMES in MALES autosomes in females x-chromosome in female x-chromosome in males Answer :C

Discussion

4221.	Question : Bark of which plant yields famous drug of malaria?
Answer» Cinchona Quercus Betula Eucalyptus Answer :A

Discussion

4222.	Question : Barbara Mc Clintock work showed that in maize
Answer» RNA transcribed from genes is report to FORM MATURE mRNA genes are stably located at specific sites of chromosomes certain genes MOVE from ONE chromosome to another or WITHIN the same chromosome genes are exchanged between chromosomes during chiasmata formation Answer :C

Discussion

4223.	Question : Balbiani rings occur in
Answer» LAMPBRUSH CHROMOSOMES hetersomes ALLOSOMES POLYTENE chromosomes SOLUTION :N/A

Discussion

4224.	Question : Balanced diet should have
Answer» PROTEIN 1/5, FAT 3/5, CARBOHYDRATE 1/5 protein 3/5, fat 1/5, carbohydrate 1/5 protein 1/5, fat 1/5, carbohydrate 3/5 protein 1/2, fat 1/4, carbohydrate 1/4 Answer :C

Discussion

4225.	Question :Balance the following chemical equation and identify the type of chemical reaction. a)Mg(s) + Cl_2 (g) to MgCl_2 (s) b) HgO(s) to overset("heat")(to) Hg(l) + O_2 (g) uarr c)Na(s) + S(s) overset("heat")(to) Na_2S (s)
Answer» Solution :It is a combination reaction. B) It is a THERMAL DECOMPOSITION reaction. c) It is a combination reaction.

Discussion

4226.	Question : Bacterial ribosomes are found
Answer» in the cytoplasm on NUCLEAR memberane on the CELL wall on ENDOPLASMIC reticulum Answer :A

Discussion

4227.	Question : Bacterial cell wall is composed mainly of
Answer» CELLULOSE CHITIN pepitodoglycan PECTIN SOLUTION :N/A

Discussion

4228.	Question : Bacteria, which directly convert atmospheric nitrogen into nitrogen compounds, are called
Answer» NITROGEN FIXING BACTERIA denitrifying bacteria putrefying bacteria nitrifying bacteria ANSWER :A

Discussion

4229.	Question : Bacteria, which are smallest in size, are
Answer» Cocci Spirilla Bacilli Vibrio ANSWER :A

Discussion

4230.	Question : Bacteria, which are smallest among the follow ingare
Answer» Spirullum Bacilli Vibrio Cocci ANSWER :D

Discussion

4231.	Question : Bacteria have a simpler body plan whencomparedwith humanbeings. Does it mean thathumanbeings are moreevolved than bacteria?
Answer» Solution :TAKING the totality of life characteristics into account, it is hard to label either bacteria or human being as evolved. Evolution is simply the generation of diversity and the SHAPING of the diversity by environmental selection. Also, it is not as if the newly generated species are in any way better than the older one. It is just that natural selection and genetic DRIFT have together led to the formation of a population that cannot reproduce with the original one. The only progressive trend in evolution seems to be that more and more complex body designs have emerged over time. However, again, it is not as if the older designs are inefficient. In fact, one of the simplest life forms-bacteria-inhabit the most inhospitable habitats like hot springs, deep-sea thermal vents and the ice in Antarctica. In other WORDS, human beings are not the crest of evolution, but simply YET another species in the abundant spectrum of evolving life.

Discussion

4232.	Question : Bacteria lack
Answer» CELL WALL cell MEMBRANE MITOCHONDRIA cytoplasm SOLUTION :N/A

Discussion

4233.	Question : Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria? Provide a suitable explanation.
Answer» Solution :EVOLUTION is simply the generation of diversity and the shaping of the diversity by environmental selection. Human beings have complex body DESIGN COMPARED to bacteria, but Bacteria has the ability to INHABIT in the most inhospitable habitats like hot springs, deep-sea thermal vents and the ice in Antarctica. The simpler body design of bacteria is no way lesser than that of the human beings. Hence human beings are not more evolved than bacteria.

Discussion

4234.	Question : Bacteria cannot survive in a highly salted pickle because
Answer» the pickle does not contain nutrients neces sary for bacterial growth bacteria do not get enough LIGHT for photo synthesis they BECOME plasmolysed and CONSEQUENTLY killed none of the above ANSWER :C

Discussion

4235.	Question : Bacteria cell wall contains
Answer» cellulose peptidoglycan pectin chitin ANSWER :D

Discussion

4236.	Question : "Bacteria and man are different in their external appearance but there are close resemblances in their cell structure and physiology'. Give two examples to the similarities indicated in the Statement
Answer» Answer :i) ENERGY is stored in ATP Moleculesii) Genes DETERMINE HEREDITARY TRAITS.

Discussion

4237.	Question : Bacteria are considered to be the plants because they
Answer» have RIGID cell walls are PRESENT every where can multiply by fission cannot MOVE ANSWER :A

Discussion

4238.	Question : Backflow of blood inside the heart is prevented during contraction by
Answer» thick muscular wall of left ventricle thin WALLS of atria valves PRESENT in heart All of the above Solution :Function of valves in circulatory SYSTEM in to prevent backflow of BLOOD.

Discussion

4239.	Question : (b) What is meant by reproduction? (b) What ae the two general methods of reproducrtion in organisms? (c) How does and Amoebareproduce? Descirbe the process of reproduction in Ameoba with the help of labelled diagrams of different statages by its reproduction process. (d) What is teh name of the process by which Amoeba reproduces? (e) Name two organisms which reproduce by the same asxual process at that of Amoeba.
Answer» SOLUTION :N//A

Discussion

4240.	Question : Axons of preganglionic neurons in the human sympathetic nervous system emerge from which regions of the spinal cord?
Answer» CRANIAL and scaral THORACIC and LUMBER Cranial and thoracic Lumber and sacral Answer :B

Discussion

4241.	Question : Axon is characterised by
Answer» TRANSFORMATION of energy receiving the IMPULSE providing energy for impulse conduction of impulse Answer :D

Discussion

4242.	Question : Axon carries impulses towards the cyton.
Answer» SOLUTION :Axon CARRIES impulses AWAY from the cyton.

Discussion

4243.	Question : Axial skeleton in man is made up of
Answer» 126 bones 100 bones 30 bones 24 bones Answer :D

Discussion

4244.	Question : (a)What is the difference between self-pollination and cross-pollination ? (b) What happens to the pollen which falls on a suitable stigma ? Explain.
Answer» Solution :(a) (b) On a suitable stigma, the pollen BEGINS to germinate and forms a pollen tube. The tube carrying two male gametes GROWS through style, reaches embryo SAC and fertilises the egg to form zygote, with 1st male gamete. The 2nd male gamete fuses with the secondary NUCLEUS resulting in Primary Endosperm Nucleus. This is double fertilisation.

Discussion

4245.	Question : a)What is Biomass. b) An environmentalist on visit to your school suggested the use of three R's to save the environment. Explain what he meant by three 'R's and how you would follow his advice at home.
Answer» Solution :a) The material contained in the bodies of plants and animals is called biomass B) Three R.s to save the environment : We can reduce pressure on the environment by applying the maximum of reduce, recycle and reuse in our lives. Reduce means to use less : By switching off unnecessary lights and fans to save electricity. By repairing leaky taps to save water. By not wasting food. Recycle means to collect plastic, paper glass and metal items and recycle these materials to make REQUIRED things. In order to recycle, firstly SEGREGATION of waste is necessary so that materials that can be recycled are not dumped ALONG with other wastes. Reuse means to use things again and again. The used envelope can be reversed and used again INSTEAD of being thrown away. The plastic bottles of food items like jam or pickle can be used for storing things in the kitchen.

Discussion

4246.	Question : Avena coleoptile test to find out the amount of growth promoting hormones was discovered by
Answer» F.W. Went L.J. Oudum K.V. Thimann F. Skoog Answer :A

Discussion

4247.	Question : Avena coleoptile test was conducted by
Answer» DARWIN SOLUTION :F.W. WENT

Discussion

4248.	Question : Auxins, Parthenocarpy, apical dominance, Parathormone.
Answer» SOLUTION :PARATHORMONE

Discussion

4249.	Question : Auxins, cytokinins and gibberellins inhibit plant growth, while abscisic acid and Ethylene promote plant growth.
Answer» SOLUTION :False -CORRECT Statement: Auxins, cytokinins and gibberellins promote PLANT growth. wh1le abscisic ACID and ethylene inhibit plant growth.

Discussion

4250.	Question : Auxin inhibits the growth of
Answer» APICAL BUDS parthenocarpic development of FRUITS lateral axillary buds ROOTS of cuttings Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : "Bile juice does not contain any enzyme but is essential for digestion ." Justify the statement.

Question : Biceps branchii and triceps branchii are

Question : Besides water, name any two main components of human sweat.

Question : Besides giving out secretory vesicles the golgi complex is also concerned with the formation of

Question : Besides blood, there's another fluid connective tissue in our body called lymph. Describe briefly.

Question : Besdes calcium phosphate the bones contain

Question : Benign malaria is caused by

Question : Bending of growing shoot towards sunlight is called

Question : Behaviour that involves an external stimulus triggering a genetically determined response is called

Question : Because most of the amino acids are represented by more than one codons, the genetic code is said to be

Question : BCG vaccine provides protection from

Question : Basic unit of plasma membrane is

Question :Basic idea of organic evolution is

Question : Basic functional unit of human kidney is

Question : Based on the given model, make a suitable piair from the following box: Model Charles Darwin - The theory of natural selection

Question : Based on the air pollution, water pollution and soil pollution, complete the following chart.

Question : Based on given diagram, answer the following questions a] Label the parts A, B, C,D. b] Name the hormone secreted by testis and mention its role. c] State the function of B and C in the process of reproduction.

Question : Barr body represents

Question : "Barr body" is derived from

Question : Bark of which plant yields famous drug of malaria?

Question : Barbara Mc Clintock work showed that in maize

Question : Balbiani rings occur in

Question : Balanced diet should have

Question :Balance the following chemical equation and identify the type of chemical reaction. a)Mg(s) + Cl_2 (g) to MgCl_2 (s) b) HgO(s) to overset("heat")(to) Hg(l) + O_2 (g) uarr c)Na(s) + S(s) overset("heat")(to) Na_2S (s)

Question : Bacterial ribosomes are found

Question : Bacterial cell wall is composed mainly of

Question : Bacteria, which directly convert atmospheric nitrogen into nitrogen compounds, are called

Question : Bacteria, which are smallest in size, are

Question : Bacteria, which are smallest among the follow ingare

Question : Bacteria have a simpler body plan whencomparedwith humanbeings. Does it mean thathumanbeings are moreevolved than bacteria?

Question : Bacteria lack

Question : Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria? Provide a suitable explanation.

Question : Bacteria cannot survive in a highly salted pickle because

Question : Bacteria cell wall contains

Question : "Bacteria and man are different in their external appearance but there are close resemblances in their cell structure and physiology'. Give two examples to the similarities indicated in the Statement

Question : Bacteria are considered to be the plants because they

Question : Backflow of blood inside the heart is prevented during contraction by

Question : Axons of preganglionic neurons in the human sympathetic nervous system emerge from which regions of the spinal cord?

Question : Axon is characterised by

Question : Axon carries impulses towards the cyton.

Question : Axial skeleton in man is made up of

Question : (a)What is the difference between self-pollination and cross-pollination ? (b) What happens to the pollen which falls on a suitable stigma ? Explain.

Question : a)What is Biomass. b) An environmentalist on visit to your school suggested the use of three R's to save the environment. Explain what he meant by three 'R's and how you would follow his advice at home.

Question : Avena coleoptile test to find out the amount of growth promoting hormones was discovered by

Question : Avena coleoptile test was conducted by

Question : Auxins, Parthenocarpy, apical dominance, Parathormone.

Question : Auxins, cytokinins and gibberellins inhibit plant growth, while abscisic acid and Ethylene promote plant growth.

Question : Auxin inhibits the growth of