24277 + Interview Questions in Biology in Class 12 Page 117 InterviewSolution

5801.	Question : The immune system plays an important role in (a) Recognition of foreign antigens (b) Responds to antigens and remembers then (c) Allergic reactions (d) Auto-immune diseases (e) Organ transplantation
Answer» B, C and E a and b only a, b, c and d a, b, c, d and e Answer :D

Discussion

5802.	Question : The leydig's cells as found in the human body are the secretory sources of :
Answer» INTESTINAL MUCUS Glucagon Androgens Progesterone Answer :C

Discussion

5803.	Question : The immunoglobulin present in mother's milk is
Answer» lgD lgE 1gM lgA Answer :D

Discussion

5804.	Question : The Leydig cells secrete :
Answer» Glucagon Androgens Oestrogen Lactogen Answer :B

Discussion

5805.	Question : The Leydig cells secrete
Answer» OESTROGEN TESTOSTERONE Progesterone Corticosterone ANSWER :B

Discussion

5806.	Question : The immunoglobulin abundant in colostrum is
Answer» IG G Ig M Ig D Ig A ANSWER :D

Discussion

5807.	Question : The levels of biological organization in ecology are
Answer» CELL, organism, community, BIOSPHERE organism, family, community, biome SPECIES, population, community biome organism, population, community, biome Answer :D

Discussion

5808.	Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. Which cells of body are affected by the pathogen ?
Answer» SOLUTION :HELPER T-lymphocytes (TH or T4)are AFFECTED.

Discussion

5809.	Question : The letter T-in T-lymphocyte refers to
Answer» THYROID THALAMUS Tonsil THYMUS SOLUTION :Thymus

Discussion

5810.	Question : The immune system of a person is suppressed. He was found positive for a pathogen in the daignostic test ELSIA.(a) Name the disease, the patient is suffering from.(b) Which pathogen is identified by ELSIA test?© Which cells of the body are attacked by the pathogen?(d) Suggest preventive measures of the infection.
Answer» Solution :(i) AIDS (Acquired Immuno Deficiency Syndrome) (ii) HIV (Human Immunodeficiency Virus) (III) Helper T-cells, macrophages, B-lymphocytes. (iv)Preventive measures:(a) PEOPLE should be educated about AIDS transmission. (b) Disposable needles and syringes should be used. (c) Sexual habits should be CHANGED IMMEDIATELY. (d) High-risk groups should be discouraged from donating blood. (e) Routine screening may be done.

Discussion

5811.	Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. What is the causative organism ?
Answer» Solution :Causative AGENT is HUMAN Immuno deficiency Virus (HIV).

Discussion

5812.	Question : The letter T in T-lymphocyte refers to
Answer» THYROID THALAMUS TONSIL Thymus Answer :D

Discussion

5813.	Question : The immune system of a person is suppressed,. In ELISA test, the result is positive (i) Name the disease associated with condition. (ii) Why didhe loose his immunity?
Answer» SOLUTION :AIDS caused by Human Immuno Virus. In AIDS. the PATHOGEN DESTROYS the T-lymphocytes which FORMS the major IMMUNE resouce of our body.

Discussion

5814.	Question : The length of the DNA is far greater than the dimebsion of the nucleus. Mention how DNA is packed within the cell.
Answer» Solution :DNA is warpped AROUND HISTONE actamer (a unit of eight histone molecules) to form a structure CALLED nucleosome.

Discussion

5815.	Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. Name the disease the patient is suffering from.
Answer» Solution :PATIENT is suffering from ACQUIRED IMMUNO DEFICIENCY SYNDROME (AIDS).

Discussion

5816.	Question : The length of the DNA having 23 base pairs is
Answer» 78Å 78.4Å 78.2Å 74.2Å Answer :D

Discussion

5817.	Question : The immediate product of carboxylation in C_3 plants
Answer» RUBP PGA OAA GAP Answer :B

Discussion

5818.	Question : The immoblization of enzyme is achived by:
Answer» killing the cells without AFFECTING enzyme attaching the ENZYMES COVALENTLY to a SOLID support entrapping the living cells in gel All of these Answer :D

Discussion

5819.	Question : The identified species of all organisms on the earth range between 1.7 to 1.8 million. Global Biodiversity Information Facility and the Species 2000 have identified the number of species in each group of animals. a. Name the group with maximum species identified. b. Name the group with the less species identified. c. Give an approximate number of mammalian species identified.
Answer» SOLUTION :a. INSECTS B. VIRUSES C. 4,650

Discussion

5820.	Question : The length of DNA in bacteriophage phi xx 174
Answer» 5386 BASES 48502 BP `4.6xx10^6` bp `3.3xx 10^9` bp Answer :A

Discussion

5821.	Question : The idea that the life originates from pre-existing life is referred as
Answer» BIOGENESIS theory special CREATION theory abiogenesis theory extraterrestrial theory Answer :A

Discussion

5822.	Question : The idea of tissue culture originated from thr concept of totipotency what is meant by it ?
Answer» Solution :The inherent capacity of a cell to give rise to a whole PLANT is CALLED TOLIPOTENCY .

Discussion

5823.	Question : The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells . How is this DNA accommodated ?
Answer» SUPER COOLING in nucleosomes Dnase digestion Through ELIMINATION of REPETITIVE DNA Deletion of non-essential genes Answer :A

Discussion

5824.	Question : The idea of tissue culture originated from thr concept of totipotencName the chemical substances present in nutrient medium used as carbon source .
Answer» ltgt Solution :SUCROSE

Discussion

5825.	Question : The idea of spontaneous generation was refuted by
Answer» F REDDI L Pasteur L Spallanzani All of these Answer :D

Discussion

5826.	Question :The length of DNA having 23 base pairs is :
Answer» `78 Å` `78.4 Å` `74.8 Å` `78.2 Å` ANSWER :D

Discussion

5827.	Question : The idea of spontaneous generation was supported by
Answer» Anaximus Anximander Empedocles Pasteur ANSWER :B

Discussion

5828.	Question : The length of different intenodes in a culm of sugarcane is variable because of :
Answer» Size of LEAF lamina at the NODE below each internode Intercalary meristem Shoot APICAL meristem Position of axillary buds Answer :B

Discussion

5829.	Question : The idea of JFM originated from the management of [x] forests in [y].
Answer» x = Ocimum SANCTUM y = Gujarat x = Eichhornia y = West BENGAL x = Water hyacinth y = Himachal Pradesh x = Shorea ROBUSTA y = West Bengal Answer :D

Discussion

5830.	Question : The …. (I)….provides the template, during translation and….(II).... brings amino acids and read the genetic code, and….(III)….play structural and catalytic role. Choose the correct word for I, II and II blanks?
Answer» `{:(I,,II,,III),(r-RNA,,t-RNA,,m-RNA):}` `{:(I,,II,,III),(hn-RNA,,Sn-RNA,,t-RNA):}` `{:(I,,II,,III),(m-RNA,,t-RNA,,r-RNA):}` `{:(I,,II,,III),(m-RNA,, r-RNA,,t-RNA):}` ANSWER :C

Discussion

5831.	Question : The Lederberg replica plating experiment showed that
Answer» mutations are actually pre-adaptive and EVOLUTION is not directed process, in fact evolution is based on chance events in nature and chance mutation in the organism mutations appear in organism in response to change in the enviorment, conscious reaction desire or use and disuse of organs mutations are random and CONTINUOUS variations that FORM the RAW material for gradual changes of evolution all of these Answer :A

Discussion

5832.	Question : The hypofunction od B-cells of islet of Langerhans are
Answer» Hypoglycaemia and glycocuria Hyperglycaemia and glycocuria Hyper insulinisms and uraemia Hyperglycaemia and DIABETES mellitus Answer :D

Discussion

5833.	Question : The leaves, flowers and fruits of the same tree not only have limited dimensions but also appear and fall periodically and some time repeatedly.
Answer» ANSWER :1

Discussion

5834.	Question : If water enters in a cell, the pressure exerted by its swollen protoplast is:
Answer» ANSWER :TURGOR PRESSURE

Discussion

5835.	Question : The hydrostatic pressure developed in the roots is called_______pressure.
Answer» ANSWER :ROOT

Discussion

5836.	Question : The layers of uneven columnar cells which form tracheal lining are component of:
Answer» BRUSH BORDER epithelium Stratified epithelium Pseudostratified epithelium Ciliated epithelium Answer :C

Discussion

5837.	Question : The hybrids containing alleles of contrasting traits are called
Answer» HYBRIDS RECOMBINANTS HOMOZYGOUS HETEROZYGOUS ANSWER :D

Discussion

5838.	Question : The layer of eye ball caontaining many blood vessels and looks bluish in colour is
Answer» CORNEA SCLERA choroid PUPIL ANSWER :C

Discussion

5839.	Question : The latest techniques of improvement of cattle is ___________________.
Answer» ANSWER :MOET

Discussion

5840.	Question : The hybrids are generally found to be superior to their parents , it is because of
Answer» Homozygosity Hybrid vigour Parents are GENERALLY weak None of these Solution :BREEDING usually takes place between members of DIFFERENT varieties or strains, and in CERTAIN PLANTS of closely related species.The progeny is known as hybrid and have phenotypes showing characteristics which are superior to either of the parents stock.This phenomenon is known as hybrid vigour or heterosis.

Discussion

5841.	Question : The hybridoma technique was developed by:
Answer» LOUIS Pasteur Edward Jenner Georges KOHLER and CASER Milstein Bumet Answer :C

Discussion

5842.	Question : The law of segregation is universally applicable.
Answer» Solution :(1) Acording to the law of segregation, the members of the allelic pair remain TOGETHER without mixing with each other. (2) They segregate or separate when the gametes are FORMED. (3) THUS the gametes that are formed receive only one of the two factors. (4) Now it is know that hte organisms are diploid and the gameters PRODUCED by them are haploid. (5) The law of segregation is therefore UNIVERSALLY applicable.

Discussion

5843.	Question : The hybrid varieties of wheat are
Answer» Gourani HIGH GATE Both (a) and (B) NP-170 Answer :D

Discussion

5844.	Question : The law derived from Mendel's dihybrid cross is______.
Answer» ANSWER :INDEPENDENT ASSORTMENT

Discussion

5845.	Question : The human sperm was first discovered by :-
Answer» VON BAER Leeuwenhock Robert HOOK Darwin Answer :B

Discussion

5846.	Question : The latest techniques of improvement of cattle is _____.
Answer» ANSWER :MOET

Discussion

5847.	Question : The human male never passes on the gene for haemophillia to his son. Why?
Answer» Solution :Male SEX is DETERMINED by Y-chromosome which does not BEAR the gene for HAEMOPHILLIA.

Discussion

5848.	Question : The lateral ventricles with 3rd ventriclesby_____.
Answer» ANSWER :FORAMEN of MONRO

Discussion

5849.	Question : The human male never passes on the gene for haemophilia to his son. Why is it so ?
Answer» SOLUTION :The gene for harmophilia is present on X chromosome. A male has only one X chromosome which he receives from his mother and Y chromosome from FATHER. The HUMAN male passes the X chromosome to his daughters but not OT the male progeny (sons).

Discussion

5850.	Question : The human kidney is originated from which germ layer?
Answer» is responsible for the storage of nutrients such as glycogen concentrates the urine by ACTIVELY transporting water out of the filtrate produces taoce dilute urine when the COLLECTING ducts become less PERMEABLE to water responds to ANTIDIURETIC bornmone by increasing urine output Solution :From the DCT, the filtrate ENTERS the collecting tubule, where further reabsorption of water takes place. Now the filtrate becomes more concentrated which makes the urine hypertonic. When the collecting duct becomes less permeable to water it produces more dilute urine.

Discussion

Explore topic-wise InterviewSolutions in .

Question : The immune system plays an important role in (a) Recognition of foreign antigens (b) Responds to antigens and remembers then (c) Allergic reactions (d) Auto-immune diseases (e) Organ transplantation

Question : The leydig's cells as found in the human body are the secretory sources of :

Question : The immunoglobulin present in mother's milk is

Question : The Leydig cells secrete :

Question : The Leydig cells secrete

Question : The immunoglobulin abundant in colostrum is

Question : The levels of biological organization in ecology are

Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. Which cells of body are affected by the pathogen ?

Question : The letter T-in T-lymphocyte refers to

Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. What is the causative organism ?

Question : The letter T in T-lymphocyte refers to

Question : The immune system of a person is suppressed,. In ELISA test, the result is positive (i) Name the disease associated with condition. (ii) Why didhe loose his immunity?

Question : The length of the DNA is far greater than the dimebsion of the nucleus. Mention how DNA is packed within the cell.

Question : The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen. Name the disease the patient is suffering from.

Question : The length of the DNA having 23 base pairs is

Question : The immediate product of carboxylation in C_3 plants

Question : The immoblization of enzyme is achived by:

Question : The length of DNA in bacteriophage phi xx 174

Question : The idea that the life originates from pre-existing life is referred as

Question : The idea of tissue culture originated from thr concept of totipotency what is meant by it ?

Question : The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells . How is this DNA accommodated ?

Question : The idea of tissue culture originated from thr concept of totipotencName the chemical substances present in nutrient medium used as carbon source .

Question : The idea of spontaneous generation was refuted by

Question :The length of DNA having 23 base pairs is :

Question : The idea of spontaneous generation was supported by

Question : The length of different intenodes in a culm of sugarcane is variable because of :

Question : The idea of JFM originated from the management of [x] forests in [y].

Question : The …. (I)….provides the template, during translation and….(II).... brings amino acids and read the genetic code, and….(III)….play structural and catalytic role. Choose the correct word for I, II and II blanks?

Question : The Lederberg replica plating experiment showed that

Question : The hypofunction od B-cells of islet of Langerhans are

Question : The leaves, flowers and fruits of the same tree not only have limited dimensions but also appear and fall periodically and some time repeatedly.

Question : If water enters in a cell, the pressure exerted by its swollen protoplast is:

Question : The hydrostatic pressure developed in the roots is called_______pressure.

Question : The layers of uneven columnar cells which form tracheal lining are component of:

Question : The hybrids containing alleles of contrasting traits are called

Question : The layer of eye ball caontaining many blood vessels and looks bluish in colour is

Question : The latest techniques of improvement of cattle is ___________________.

Question : The hybrids are generally found to be superior to their parents , it is because of

Question : The hybridoma technique was developed by:

Question : The law of segregation is universally applicable.

Question : The hybrid varieties of wheat are

Question : The law derived from Mendel's dihybrid cross is______.

Question : The human sperm was first discovered by :-

Question : The latest techniques of improvement of cattle is _____.

Question : The human male never passes on the gene for haemophillia to his son. Why?

Question : The lateral ventricles with 3rd ventriclesby_____.

Question : The human male never passes on the gene for haemophilia to his son. Why is it so ?

Question : The human kidney is originated from which germ layer?