24277 + Interview Questions in Biology in Class 12

1.	Question : The early stage of human embryo distinctly possesses:
Answer» Gills Gills slits External ear Eye brows Answer :B

Discussion

2.	Question : The early belief of the spontaneous origin of life was disproved by
Answer» Louis Pasteur R KOCH LEDERBERG C DARWIN Answer :A

Discussion

3.	Question : The earliest man who used tools was
Answer» HOMO habilis Homo erectus Java man PEKING man Answer :A

Discussion

4.	Question : The earliest hominids that evolved more than four million years ago were
Answer» Homo erectus Australopithecus Cro-Magnon Man Neanderthal Man. Solution :Origin of Homo sapiens . DNA analysis indicates the possibility that human species originated about `200,000` year agoin Africa from a single female/Eve. Separation of human races occurred into asian, european, AUSTRALIAN and other stockes about `100,000 - 50,000` years back. It is called out of Africa model.The other view POINT, called MULTIREGIONAL model, BELIEVES that H. sapiens developed from H. erectus in many parts of world roughly at the same time due to same selective pressure. Neanderthals (Homo sapiens neanderth-alensis)livedin europe and middle east. They were adaptedto cold conditions with heavy built and large-sized brain. Neanderthals died out about `40,000` years ago.DNA test indicates that they are not closely related to modern human beings.

Discussion

5.	Question : The earlist fossils form in the phylogeny of Horse is:
Answer» Merychippus Mesohippus Eohippus Equus Answer :C

Discussion

6.	Question : The E-coil cells, having '2' gene in lac operon do not grow on medium containing lactose as sole source of energy because,
Answer» in these CELL, lac operon is active. they cannot synthesis active `beta`-GALACTOSIDASE E-coli cell do not UTILIZE lactose in presence of glucose they cannot transfer lactose from MEDIUM into the cells. Solution :they cannot synthesis active `beta`-galactosidase

Discussion

7.	Question : The dwarf varieties of wheat brought from Mexico into India were
Answer» Sonara-64 and Sonalika Sonara-64 and Lerma Roja-64 Sharbati sonara and Pusa Lerma Sonalika Solution : Sonora-64 and Lerma Rojo-64 is DWARF variety of wheat, which were BROUGHT to India, modified through mutations and integrated to INDIAN AGRICULTURE.

Discussion

8.	Question : The duration of inhalation is shortened by signals from
Answer» pneumotaxic area apneustic area inspiratory area expiratory area Answer :A

Discussion

9.	Question : The duct from the parotid gland that opens into the vestibule is known as
Answer» Wolffan DUCT Stenson's duct Mullerian duct WHARTON's duct ANSWER :B

Discussion

10.	Question : The drugs, which are commonly abused are opioid, cannabinoids and coca alkaloid. Majority of these are obtained from......... While some are obtained from .........
Answer» FUNGI, non-FLOWERING PLANTS Flowering plants, fungi Fungi, flowering plants Non flowering plants, fungi Answer :B

Discussion

11.	Question : The drug colchicine has inhibitory effect on cell cycle in which of the following stages ?
Answer» `G_1` `G_2` S M ANSWER :D

Discussion

12.	Question : The drug colchicine has inhibitory effect on cell cycle during:
Answer» Interphase Prophase-I Metaphase-II Metaphase-I Answer :B

Discussion

13.	Question : Drought spot of apples is caused by the deficiency of______.
Answer» Copper Nitrogen Boron Magnesium Answer :C

Discussion

14.	Question : The drones in honey bee are ……………….
Answer» FERTILE MALE fertile FEMALE STERILE male sterile female SOLUTION :fertile male

Discussion

15.	Question : The drone develops form an unfertilized eff if its larva if fedupon incresing porportions of
Answer» rolyal jelly honey MUCUS polen ANSWER :B

Discussion

16.	Question : The driving pressure (triangleP) in breathing which causes air to flow into the lungs is
Answer» ATMOSPHERIC PRESSURE MINUS the intra-alveolar pressure the intrapleural pressure (PPL) the intrapleural pressure minus the intraalveolar pressure the intra-alveolar (intrapulmonary) pressure (Palv). ANSWER :A

Discussion

17.	Question : The driving force of the ecosystem is :
Answer» CARBOHYDRATES inplants Biomass producers Solar energy Answer :D

Discussion

18.	Question : The driving force for any existing
Answer» Biomass Carbohydrates in producers Solar energy Producers Answer :D

Discussion

19.	Question : The double helical molecular model of DNA was given by Watson and Crick. But .DNA is double stranded. was suggested by
Answer» HERSHEY and Chase Wilkins and Franklin Griffith Avery ET at Answer :B

Discussion

20.	Question : The double fertilization is the only characteristic of :-
Answer» Bryophytes Pteridophytes Gymnosperm Angiosperm Answer :D

Discussion

21.	Question : The dorsal view of human heart.
Answer» SOLUTION :

Discussion

22.	Question : The dorsal side of the skin of Pheretima is brown due to
Answer» Porphyrin Melanin Heparin Renin Answer :A

Discussion

23.	Question : The dorsal plate of skeleton found on the abdomen of cockroach is called :
Answer» Pleuron STERNUM Tergum Vertex Answer :C

Discussion

24.	Question : Young Cockroach is called
Answer» Tergite Sternite Articular plate Arthordial membrane Answer :A

Discussion

25.	Question : The dominant producers in the neritic zone of the sea are :
Answer» Phytoplankton Zooplankton micro-organism Diatoms Answer :A

Discussion

26.	Question : The dominant epistasis ratio is
Answer» `9:3:3:1` `12:3:1` `9:3:4` `9:6:1` ANSWER :B

Discussion

27.	Question : The DNA strand that has the polarity 3'-5' and acts as a template, is also referred to as
Answer» CODING strand template strand Both (a) and (B) ANSWER :B

Discussion

28.	Question : The DNA synthesis in leading strand is
Answer» continuous not as SINGLE strand discontinuous as OKAZAKI fragments Answer :A

Discussion

29.	Question : The DNA molecule to which the gene of interest is integrated for cloning is called
Answer» transformer VECTOR TEMPLATE CARRIER SOLUTION :vector

Discussion

30.	Question : The DNA sequence of lac gene shows a mutation where the middle base of a triplet code has been substituted. However, the gene,does not show any mutation and expresses normal. This may be due to
Answer» SUPPRESSOR mutation Silent mutation WOBBLING of tRNA Degeneracy of CODON Answer :B

Discussion

31.	Question : The DNA molecule takes a complete turn after every _____ base pairs.
Answer» ANSWER :TEN

Discussion

32.	Question : The DNA in the cell ________is the information source for making proteins:
Answer» NUCLEUS RIBOSOME CELL wall Plasma membrane Answer :B

Discussion

33.	Question : The DNA fragments separated on an agarose gel can be visualised after staining with
Answer» bromophenol BLUE acetocarmine aniline blue ethidium BROMIDE SOLUTION :ethidium bromide

Discussion

34.	Question : The DNA fingerprinting analysis analysisof four family members is shown below. Study the band pattern obtainedand assign each family member to W, X, Y and Z. Choose the correctoption.
Answer» W-father , X-mother , Y-child, Z-paternal UNCLE W-Child , X-father, Y-mother, Z-maternal uncle W-father , X-child,Y-mother, Z-paternal uncle W-child, X-father , Y-maternal uncle, Z-mother Answer :C

Discussion

35.	Question : The DNA content is doubled' during the_____ stage of cell division?
Answer» Prohase METAPHASE Telophase Interphase Answer :D

Discussion

36.	Question : The dividing and undifferentiated cells are known as
Answer» CALLUS Proembryo PRIMORDIUM EMBRYO SOLUTION :Callus

Discussion

37.	Question : The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin provides evidence for
Answer» intraspecific COMPETITION interspecific competition ORIGIN of species by natural SELECTION origin of species by mutation. Solution :Darwin during his famous voyage, observed that finches from various islands of Galapagoshad beaks of different sizes and shapes. He observed that this was due to adaptation to different available food TYPES. He concluded that the ancestral finches on reaching different islands occupied all empty ecological niches in absence of competition and evolved into different species. This PROVIDE evidences for origin of species by natural selection.

Discussion

38.	Question : The diversity of the habitats over the total geographical area is called
Answer» ALPHA diversity beta diversity gamma diversity delta diversity Answer :C

Discussion

39.	Question : The distance or length of the myofibril between two adjacent Z-bands is called
Answer» Sarcomere Sarcolemma Muscle fibre Muscle fibre Answer :A

Discussion

40.	Question : The diversity in the ty of veaks of finches adapted to differenn feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for
Answer» INTRASPECIFIC competition interspecific competition origin of SPECIES by NATURAL selection origin of species by mutation. Answer :C

Discussion

41.	Question : The distance between two consecutive base pairs in DNA is "_________"
Answer» 0.34 NM 3.4 nm 0.034 nm 34 nm Solution :0.34 nm

Discussion

42.	Question : The disease which has caused severe threat to the poultry farmers recently
Answer» fowl cholera bird FLU CHIKUNGUINEA fowl pox Answer :B

Discussion

43.	Question : The disorder in which both B-lymphocytes and T-lymphocytes are not formed?
Answer» SCID AIDS CYSTIC fibrosis Muscular DYSTROPHY SOLUTION :SCID

Discussion

44.	Question : The disease which is caused by helminth parasite of man's blood that has an intermediate host of snail is ?
Answer» LIVER rot Bilharzia Ascariasis Filariasis Answer :B

Discussion

45.	Question : The disease transmitted from father to grandson through daughter in zig-zag manner is an example of
Answer» SICKLE CELL ANEMIA hemophilia phenyl ketonuria Turners syndrome Answer :B

Discussion

46.	Question : The disease that may cause sterlity due to infection spreading to sex organs is
Answer» Measles Syphilis Gonorrhoea Mumps Answer :D

Discussion

47.	Question : The disease spread by birds
Answer» SOLUTION :BIRD FLU

Discussion

48.	Question : The disease root-knot of brinjal is caused by
Answer» FUSARIUM udum Meloidogyne INCOGNITA Pseudomonas rubillieneans Phytophthora infestans SOLUTION :Meloidogyne incognita

Discussion

49.	Question : The disease pneumonia is caused by
Answer» Virus Bacterium Cyanobacterium Protozoan Answer :B

Discussion

50.	Question : The disease due to inflammation of vermiform appendix is called:
Answer» Amoebiosis Gastritis Appendicits Hepatitis Answer :C

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : The early stage of human embryo distinctly possesses:

Question : The early belief of the spontaneous origin of life was disproved by

Question : The earliest man who used tools was

Question : The earliest hominids that evolved more than four million years ago were

Question : The earlist fossils form in the phylogeny of Horse is:

Question : The E-coil cells, having '2' gene in lac operon do not grow on medium containing lactose as sole source of energy because,

Question : The dwarf varieties of wheat brought from Mexico into India were

Question : The duration of inhalation is shortened by signals from

Question : The duct from the parotid gland that opens into the vestibule is known as

Question : The drugs, which are commonly abused are opioid, cannabinoids and coca alkaloid. Majority of these are obtained from......... While some are obtained from .........

Question : The drug colchicine has inhibitory effect on cell cycle in which of the following stages ?

Question : The drug colchicine has inhibitory effect on cell cycle during:

Question : Drought spot of apples is caused by the deficiency of______.

Question : The drones in honey bee are ……………….

Question : The drone develops form an unfertilized eff if its larva if fedupon incresing porportions of

Question : The driving pressure (triangleP) in breathing which causes air to flow into the lungs is

Question : The driving force of the ecosystem is :

Question : The driving force for any existing

Question : The double helical molecular model of DNA was given by Watson and Crick. But .DNA is double stranded. was suggested by

Question : The double fertilization is the only characteristic of :-

Question : The dorsal view of human heart.

Question : The dorsal side of the skin of Pheretima is brown due to

Question : The dorsal plate of skeleton found on the abdomen of cockroach is called :

Question : Young Cockroach is called

Question : The dominant producers in the neritic zone of the sea are :

Question : The dominant epistasis ratio is

Question : The DNA strand that has the polarity 3'-5' and acts as a template, is also referred to as

Question : The DNA synthesis in leading strand is

Question : The DNA molecule to which the gene of interest is integrated for cloning is called

Question : The DNA sequence of lac gene shows a mutation where the middle base of a triplet code has been substituted. However, the gene,does not show any mutation and expresses normal. This may be due to

Question : The DNA molecule takes a complete turn after every _____ base pairs.

Question : The DNA in the cell ________is the information source for making proteins:

Question : The DNA fragments separated on an agarose gel can be visualised after staining with

Question : The DNA fingerprinting analysis analysisof four family members is shown below. Study the band pattern obtainedand assign each family member to W, X, Y and Z. Choose the correctoption.

Question : The DNA content is doubled' during the_____ stage of cell division?

Question : The dividing and undifferentiated cells are known as

Question : The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin provides evidence for

Question : The diversity of the habitats over the total geographical area is called

Question : The distance or length of the myofibril between two adjacent Z-bands is called

Question : The diversity in the ty of veaks of finches adapted to differenn feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for

Question : The distance between two consecutive base pairs in DNA is "_________"

Question : The disease which has caused severe threat to the poultry farmers recently

Question : The disorder in which both B-lymphocytes and T-lymphocytes are not formed?

Question : The disease which is caused by helminth parasite of man's blood that has an intermediate host of snail is ?

Question : The disease transmitted from father to grandson through daughter in zig-zag manner is an example of

Question : The disease that may cause sterlity due to infection spreading to sex organs is

Question : The disease spread by birds

Question : The disease root-knot of brinjal is caused by

Question : The disease pneumonia is caused by

Question : The disease due to inflammation of vermiform appendix is called: