24277 + Interview Questions in Biology in Class 12 Page 145 InterviewSolution

7201.	Question : T-lymphocytes originate from :
Answer» LIVER THYMUS Bone marrow Both (b) and (c) ANSWER :D

Discussion

7202.	Question : The bacteria which attack dead animals are
Answer» first link of the food chain and are known as PRIMARY producers third link of the food chain and are tertiary consumers the end of food chain and are decomposers the end of food chain and are decomposers. Solution :Bacteria ATTACKING the dead animals represent the end of the food chain and are decomposers. These are the organisms that obtain ENERGY from chemical breakdown of organisms . They secrete enzymes onto dead matter and then absrob the breakdown products. Becteria are specialised to breakdown organic materials that are difficults for ROLE in the ccosystem , returning the constituents of organic matter to the environment in inroganic forms so that they cn AGIN be assimilated by producers.

Discussion

7203.	Question : T-lymphocytes and B-lymphocytes
Answer» SOLUTION :

Discussion

7204.	Question :The B-chain of Insulin is composed of………….aminoacids
Answer» 70 30 45 60 Solution :30

Discussion

7205.	Question : T- Lymphocytes become mature in thyroid gland.true or false
Answer» ANSWER :THYMUS GLAND

Discussion

7206.	Question : The back cross of F_1 hybrid with recessive parent is called _____
Answer» SOLUTION :TEST CROSS

Discussion

7207.	Question : T-DNA for gene transfer is present in(A) Bacillus thuringiensis(B) Meloidogyne incognita(C) Agrobacterium tumefaciens(D) E.coli
Answer» BACILLUS thuringiensis Meloidogyne incognitia AGROBACTERIUM TUMEFACIENS E.coli Solution :Agrobacterium tumefaciens

Discussion

7208.	Question : The average price tag of US is 22 trillion US dollars a year. Which is the most price tagged ecosystem service in nature?
Answer» SOLUTION :Soil CREATION is the most PRIZE tagged ecosystem SERVICE.

Discussion

7209.	Question :T-lymphocyte is produced in
Answer» BONE MARROW Spleen Pancreas THYMUS SOLUTION :Bone marrow

Discussion

7210.	Question : T-cells become mature in _____.
Answer» ANSWER :THYMUS

Discussion

7211.	Question : The average process of nitrogen fixation, the redution of NO_(3)in the soil into molecular nitogen is called :
Answer» Chlorination Ammonification Denitrification Nitrification Answer :C

Discussion

7212.	Question : The average efficiency of energy transfer from herbivore to carnivore level is
Answer» `5%` `10%` `30%` `20%` SOLUTION :`10%`

Discussion

7213.	Question : Systemic circulation takes place between which chambers of heart –
Answer» LEFT ATRIUM and left VENTRICLE Left ventricle and RIGHT atrium Right atrium and right ventricle Right ventricle and left atrium Answer :B

Discussion

7214.	Question : The auriculo-ventricular valves need to close to prevent the backflow. But the ventricular pumping is so forceful that these valves need additional support to withstand this force. This support is provided by some special tendons. Which are those tendons ?
Answer» PURKINJE fibres chordae tendineae Achilles tendons epicardium Answer :B

Discussion

7215.	Question : Systemic heart comprises of :-
Answer» LEFT ATRIUM & RIGHT atrium Left VENTRICLE & right ventricle Right atrium & right ventricle Left atrium & left ventricle Answer :D

Discussion

7216.	Question : The attachment muscle proximal to joint is called_____.
Answer» ANSWER :ORIGIN

Discussion

7217.	Question : systematics is
Answer» the science based on characterization, IDENTIFICATION,and NOMENCLATURE of organism the science which deals with diversity of ORGANISMS and their comparative and evolutionary relationship among them derived from Greek word 'systema' the science which is best on observable morphological CHARACTERS. ANSWER :B

Discussion

7218.	Question : Systematics deals with study of :-
Answer» Distribution of living ORGANISMS Classification of living organisms Diversity of living organisms INCLUDING their INTER relationship Nomenclature of living organisms Answer :C

Discussion

7219.	Question : The atrium and the ventricle of the same side are separated by a thick fibrous tissue, called as–
Answer» Atrio-ventricular septum Cuspid valve Fossa ovalis Chordae tendineae Answer :A

Discussion

7220.	Question : System of classification proposed by Linnaeus was :-
Answer» Artificial NATURAL SEXUAL (1) and (3) both ANSWER :D

Discussion

7221.	Question : The atrio ventricularvalves areheldin positionby _______.
Answer» SOLUTION :CHORDAE tendinae

Discussion

7222.	Question : The atmospheric pressure is 760 mmHg at the sea level. Which of the following ranges in nearest to the partial pressure of CO_(2) in mm Hg ?
Answer» <P>0.30.0.31 0.60 - 0.61 3.0 -3.1 6.0 -6.1 SOLUTION :`P_(CO_(3))=0.30-0.31` mm Hg in AIR

Discussion

7223.	Question : Synthetic DNA or sDNA is synthesised in
Answer» LAB WITHOUT any TEMPLATE cel CELL without any template the lab without any nucleotide the cell without any nucleotide Answer :a

Discussion

7224.	Question : The atmospheric humidity is measured by :
Answer» POTOMETER Photometer Hygrometer Auxanometer Answer :C

Discussion

7225.	Question : Synthesis of yolk in female occurs in:
Answer» kidney Hepatocyte Uterus Vagina Answer :B

Discussion

7226.	Question : The atmosphere of primitive earth was
Answer» REDUCING ATMOSPHERE OXIDISING atmosphere Condensing atmosphere Vestigial organs Answer :A

Discussion

7227.	Question : Synthesis of yolk is known by:
Answer» Gluconeogenesis Glycolysis Vitellogenesis None of the above Answer :C

Discussion

7228.	Question : Synthesis of which molecule initiated cell division and biological evolution?
Answer» ANSWER :DNA(Neucleic ACID)

Discussion

7229.	Question : Synthesis of uric acid from ammonia takes place by …….. Pathway.
Answer» inosinic ornithine purine pyrimidine Answer :A

Discussion

7230.	Question : The association between blue-green algae and fungi occurs in
Answer» Lichens Symbiosis Cannibism Mycorrhiza Answer :A

Discussion

7231.	Question : Synthesis of urea in liver takes place by:
Answer» ORNITHINE cycle Kerbs cycle Calvin cycle Glycolysis Answer :A

Discussion

7232.	Question : The association of histone H1 with a nucleosome indicates
Answer» transcription is occurring DNA replication is occurring the DNA is condensed into chromatin FIBRE the DNA double HELIX is exposed Solution :The association of `H_(1)` histone with nucleosome indicates that DNA REMAINS in its condensed form. Concept Enhancer In eukaryotes , DNA packaging is carried out with the help of histone proteins. Nucleosome is the UNIT of compaction . Its core consists of four pairs of histones `(H_(2)A,H_(2)B,H_(3)andH_(4))`. The linker DNA, consisting of `H_(1)` histone connects two adjacent NUCLEOSOMES. They together constiute chromatosome . it gives rise to a chromatin fibre after further condensation.

Discussion

7233.	Question : Synthesis of testosterone by Leydid cells is stimulated byLHFSHTSHICSH
Answer» LTH FSH TSH ICSH Answer :D

Discussion

7234.	Question : The association of animals when both partners are benefitted is
Answer» Commensalism Amensalism MUTUALISM PARASITISM ANSWER :B

Discussion

7235.	Question : Synthesis of sugars in all photosynthetic plants takes place by
Answer» `CO_2` fixation with PEPcase CALVIN cycle REACTION HATCH and SLACK reactions Both `C_3 and C_4` cycle reactions Answer :B

Discussion

7236.	Question :The assimilatory power of photosynthesis is:
Answer» ATP NADH ATP and NADH ATP,NADH and `CO_2` ANSWER :C

Discussion

7237.	Question : Synthesis of gene when DNA sequence is not known can be done via
Answer» combining NUCLEOTIDES cDNA SYNTHESIS TRNA synthesis All of the above Answer :B

Discussion

7238.	Question : The assemblage of all the populations different species that function as an integrated unit through coevolved metabolic transformation in a specific area is called.
Answer» biome biotic community population ecosystem Answer :B

Discussion

7239.	Question : The arrangement of the nuclei in a normal embryosac in the dicot plant is(A) 2 +4 + 2(B) 3 + 2 + 3(C) 2 + 3 + 3(D) 3 + 3 +2
Answer» `2 +4 + 2` `3 + 2 + 3` `2 + 3 + 3` `3 + 3 +2` ANSWER :B

Discussion

7240.	Question : Synthesis of lipids & carbohydrates is regulated by-
Answer» SER RER Ribosomes Lysosomes Answer :A

Discussion

7241.	Question : The arrangement of xylem in stem is
Answer» Endarch Exarch Mesarch Both (a) and (B) ANSWER :A

Discussion

7242.	Question : Synthesis of food in C_4 pathway occurs in chlorophyll of:
Answer» GUARD cells Bundle sheath Spongy mesophyll Palisade cells Answer :B

Discussion

7243.	Question : Synthesis of glucose from non-carbohydrate sources.
Answer» ANSWER :GLUCONEOGENESIS

Discussion

7244.	Question : The arrangement of the nuclei in a normal embryo sac in the dicot plants is
Answer» 3+3+2 2+4+2 3+2+3 2+3+3 Answer :C

Discussion

7245.	Question : Synthesis of DNA from RNA is explained by
Answer» central dogma REVERSE reverse transcription teminism all of these. Solution :(d) : DNA REPLICATION REFERS to the porcess of formation of two similar copies of DNA using parental DNA as template. The expression of the genetic MATERIAL accurs normally through the production of proteins. This involves two consecutive steps. These are transcription and translation. THe DNA codes for the production of massenger RNA (mRNA) during transcription. mRNA carries coded information to ribosomes. The ribosomes read this information and use itfor protein synthesis. This process is called translation. Crick decribed this undirectional flow of information in 1958 as the central dogma of molecular biology. Many TUMOUR viruses contain RNA as genetic material and replicate by first synthesising a complementary DNA. This process is called reverse transcription (teminism). It is carried out by an RNA-dependent DNA polymerasecalled reverse transcriptase.

Discussion

7246.	Question : The arrangement of megaspores in a tetrad in an angiosperm is :
Answer» Decussate Tetrahedral Linear Isobilateral Answer :C

Discussion

7247.	Question : Synthesis of ATP in mitochondria requires:
Answer» NADP FMN Oxygen Pyruvic acid Answer :C

Discussion

7248.	Question : The arrangement of atoms in a molecule can be studies using
Answer» centrifugation histochemistry spectrophotometer X-ray crystallography Answer :D

Discussion

7249.	Question : Synthesis of amino acids to to prove that amino acids were formed in primitive ocean was experimentally proves
Answer» Oparin Haldane Sydney fox Stanley Miller Answer :D

Discussion

7250.	Question : The arrangement of axonemal microtubules in eukaryotic cilia and flagella is
Answer» 9 + 2 9 + 0 18 + 2 27 + 2 Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : T-lymphocytes originate from :

Question : The bacteria which attack dead animals are

Question : T-lymphocytes and B-lymphocytes

Question :The B-chain of Insulin is composed of………….aminoacids

Question : T- Lymphocytes become mature in thyroid gland.true or false

Question : The back cross of F_1 hybrid with recessive parent is called _____

Question : T-DNA for gene transfer is present in(A) Bacillus thuringiensis(B) Meloidogyne incognita(C) Agrobacterium tumefaciens(D) E.coli

Question : The average price tag of US is 22 trillion US dollars a year. Which is the most price tagged ecosystem service in nature?

Question :T-lymphocyte is produced in

Question : T-cells become mature in _____.

Question : The average process of nitrogen fixation, the redution of NO_(3)in the soil into molecular nitogen is called :

Question : The average efficiency of energy transfer from herbivore to carnivore level is

Question : Systemic circulation takes place between which chambers of heart –

Question : The auriculo-ventricular valves need to close to prevent the backflow. But the ventricular pumping is so forceful that these valves need additional support to withstand this force. This support is provided by some special tendons. Which are those tendons ?

Question : Systemic heart comprises of :-

Question : The attachment muscle proximal to joint is called_____.

Question : systematics is

Question : Systematics deals with study of :-

Question : The atrium and the ventricle of the same side are separated by a thick fibrous tissue, called as–

Question : System of classification proposed by Linnaeus was :-

Question : The atrio ventricularvalves areheldin positionby _______.

Question : The atmospheric pressure is 760 mmHg at the sea level. Which of the following ranges in nearest to the partial pressure of CO_(2) in mm Hg ?

Question : Synthetic DNA or sDNA is synthesised in

Question : The atmospheric humidity is measured by :

Question : Synthesis of yolk in female occurs in:

Question : The atmosphere of primitive earth was

Question : Synthesis of yolk is known by:

Question : Synthesis of which molecule initiated cell division and biological evolution?

Question : Synthesis of uric acid from ammonia takes place by …….. Pathway.

Question : The association between blue-green algae and fungi occurs in

Question : Synthesis of urea in liver takes place by:

Question : The association of histone H1 with a nucleosome indicates

Question : Synthesis of testosterone by Leydid cells is stimulated byLHFSHTSHICSH

Question : The association of animals when both partners are benefitted is

Question : Synthesis of sugars in all photosynthetic plants takes place by

Question :The assimilatory power of photosynthesis is:

Question : Synthesis of gene when DNA sequence is not known can be done via

Question : The assemblage of all the populations different species that function as an integrated unit through coevolved metabolic transformation in a specific area is called.

Question : The arrangement of the nuclei in a normal embryosac in the dicot plant is(A) 2 +4 + 2(B) 3 + 2 + 3(C) 2 + 3 + 3(D) 3 + 3 +2

Question : Synthesis of lipids & carbohydrates is regulated by-

Question : The arrangement of xylem in stem is

Question : Synthesis of food in C_4 pathway occurs in chlorophyll of:

Question : Synthesis of glucose from non-carbohydrate sources.

Question : The arrangement of the nuclei in a normal embryo sac in the dicot plants is

Question : Synthesis of DNA from RNA is explained by

Question : The arrangement of megaspores in a tetrad in an angiosperm is :

Question : Synthesis of ATP in mitochondria requires:

Question : The arrangement of atoms in a molecule can be studies using

Question : Synthesis of amino acids to to prove that amino acids were formed in primitive ocean was experimentally proves

Question : The arrangement of axonemal microtubules in eukaryotic cilia and flagella is