24277 + Interview Questions in Biology in Class 12

1.	Question : Photoreceptor cells are present in ……………………
Answer» BLIND spot retina cochlea cornea Answer :B

Discussion

2.	Question :Photophosphorylation in chloroplast is most similar to which of the following mitochondrial reactions ?
Answer» Oxidative phosphorylation SUBSTRATE LEVEL phosphorylation Oxidative decarboxylation HYDROLYSIS ANSWER :A

Discussion

3.	Question : Photophosphorylaton is a process in which
Answer» LIGHT energy is converted into CHEMICAL energy in the from of ATP NADP is FORMED Chemical energy is used to PRODUCE ATP `CO_2` is REDUCED to a carbohydrate Answer :A

Discussion

4.	Question :Photolysis of water during Photosynthesis occurs with the help of
Answer» PS- II PS - I FERREDOXIN Cytochrome Answer :A

Discussion

5.	Question : Photochemical smogs always contain :
Answer» PAN AND `O_2` `CH_4` and `O_2` CO and `O_3` PAN and `CH_4` ANSWER :A

Discussion

6.	Question : Photolysis of water
Answer» Only II I and II II and IV Only IV ANSWER :B

Discussion

7.	Question : Photochemical smong always contains
Answer» ALUMINIUM ions methane ozone phosphorus Answer :C

Discussion

8.	Question : Photochemical smog pollution does not contain :
Answer» CARBON dioxide PAN (peroxy ACYL NITRATE) Ozone Nitrogen dioxide Answer :A

Discussion

9.	Question : Photochemical smog is the product of .........(A) ozone reaction(B) soil contamination(C) water contamination(D) automobiles
Answer» OZONE reaction soil CONTAMINATION WATER contamination automobiles ANSWER :D

Discussion

10.	Question : Photochemical reaction of nitrogen oxides with unsaturated hydrocarbons produces
Answer» METHYL isocyanate phosgene Benzpyrene peroxy-acyl nitrates. Answer :D

Discussion

11.	Question : Photochemical smog contains Nox and SO_2.
Answer» ANSWER :A::D

Discussion

12.	Question : Photo synthetically active radiation (PAR)
Answer» 390 - 760 NM 390 - 810 nm 535 - 647 nm 647 - 760 nm Answer :A

Discussion

13.	Question : Photo oxidation of chlorophyll-a in the reaction centre is prevented by
Answer» LUTEIN `BETA` CAROTEN PHYCOERYTHRIN All Answer :D

Discussion

14.	Question : Photo centres in higher plants are
Answer» `P_(700)` `P_(680)` Both (1) & (2) CHLOROPHYLL - a Answer :C

Discussion

15.	Question : Photo-oxidation of water results in the formation of:
Answer» `H^+`O and ATP `H^+``O_2`,`e^- and ATP `H^+` `O_2` and `e^- none of these Answer :C

Discussion

16.	Question : Phosphorylation during photosynthesis is
Answer» OXIDATIVE phosphorylation and PHOTOPHOSPHORYLATION occurring in light and DARK conditions. Oxidative phosphorylation occursin lightconditions and photophosphorylation occursin darkconditions. Oxidative phosphorylation occursin dark conditions and photophosphorylation occursin light conditions. Oxidative phosphorylation occursin light and darkconditions and photophosphorylation occursonly in the PRESENCE of light. Answer :D

Discussion

17.	Question : Phosphorylation of glucose during glycolysis is catalyzed by
Answer» Phosphoglucomutase Phosphoglucoiosmerase HEXOKINASE PHOSPHORYLASE ANSWER :C

Discussion

18.	Question : Phosphorus is the major constituent of A.Biological membranes B. Nucleic acids C. Cellular energy transfer systems D. Proteins
Answer» A,B, & C B, C & D A, B, & D All Solution :A,B, & C

Discussion

19.	Question : Phosphorus is present in the rocks in form of
Answer» Phosphorus Phosgene Pyrophoospghates PHOSPHATES Solution :Phosphates

Discussion

20.	Question : Phosphorus is needed by organisms to make
Answer» BONES Teeth Shells All Solution :All

Discussion

21.	Question : Phosphorus has
Answer» imperfact NUTRIENT cycle perfect nutrient cycle gaseous cycle mixed cycle. Answer :A

Discussion

22.	Question : Phosphorus cycle : Sedimentary cycle Carbon cycle : _____
Answer» SOLUTION :GASEOUS CYCLE

Discussion

23.	Question : Phosphorus cycle
Answer» SOLUTION :

Discussion

24.	Question : Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as
Answer» Neural IONS NEGATIVELY CHARGED ions Positively charged ions Both positively and negatively charged but disproportionate mixture Answer :B

Discussion

25.	Question :Phosphoenol pyruvate (PEP) is the primary CO_2acceptor in :
Answer» `C_3`PLANTS `C_4`plants `C_2`plants `C_3 and C_4`plants Answer :B

Discussion

26.	Question : phi_(p) becomes negative in transpiring xylem tissue when
Answer» The water column inside the XYLEM is subjected to NEGATIVE PRESSURE or tension The water column inside the xylem is subjected to push The water column inside the xylem is subjected to POSITIVE hydrostatic pressure The water column in the xylem is BROKEN due to embolism Answer :A

Discussion

27.	Question : Phica semilunaris is
Answer» funcational 3rd eye LID Vestigial UPPER lid Vestigial 3rd eye lid Vestigial LOWER eye lid Answer :C

Discussion

28.	Question : Pheromones are secreted:
Answer» EXTERNALLY as a means of absorption externally as a means of conduction of impulses externally as a means of conduction of communication internally for AROUSING SEXUAL urge Answer :C

Discussion

29.	Question : Pheromones are chemical messengers that help insect in (a) Communication (b) Sending alarm signals (c) Marking trails (d) Attracting males (e) Killing pests
Answer» All EXCEPT (C) & (e) All except (B) & (d) All except (C) All except (e) Answer :D

Discussion

30.	Question : Pheretima and its close relatives obtain nourishment from
Answer» DECAYING fallen leaves and soil ORGANIC matter Soil insects Sugarcane roots Small pieces of FRESH fallen leaves of maize and others Solution :Decaying fallen leaves and soil organic matter

Discussion

31.	Question : Pheromone is:
Answer» PRODUCT of ENDOCRINE gland A protein mRNA used for ANIMAL communication Answer :D

Discussion

32.	Question : Phenylketonuria, Huntington's disease and sickle-cell anaemia are caused respectively due to disorders associated with
Answer» chromosome 4,chromosome 7 and chromosome 11 chromosome 12,chromosome 4 and chromosome 11 chromosome 7,chromosome 12 and chromosome 11 chromosome 7,chromosome 11 and chromosome 12 Answer :B

Discussion

33.	Question : Phenylketonuria (PKU) is inherited disease that is characterised by
Answer» ELIMINATION of gentisic ACID in urine Increased occurrrence of phenylalamine in BLOOD nad TISSUES Elimination of sugar in urine Decrease in phenylalanine in blood and tissues. Answer :B

Discussion

34.	Question : Phenylketonuria is a genetic disorder due to a defect in metabolism of the following.
Answer» A.Polysaccharides B.Fatty acids C. Vitamins D.AMINO ACID SOLUTION : Amino acid

Discussion

35.	Question : Phenylketonuria is
Answer» An EXAMPLE of pleiotrophy An AUTOSOMAL dominant disorder Relatade to the mutation of multiple genes An X-linked dominant disorder Answer :B

Discussion

36.	Question : Phenylketonuria is a genetic disorder of
Answer» TRISOMIC condition monosomic condition AUTOSOMAL DOMINANT GENE autosomal RECESSIVE gene Answer :D

Discussion

37.	Question : Phenylketonuria is a genetic disorder due to a defect in metabolism of the following
Answer» Polysaccharides Amino acids Vitamins Hormones Answer :D

Discussion

38.	Question : Fill In The blank : The phenotypic ratio and genotypic ratio of monohybrid test cross is ……………………
Answer» ANSWER :3:1

Discussion

39.	Question : phenotypic ratio in plant Snapdragon in F_2 is:
Answer» `1:1` `2:1` `3:1` `1:2:1` ANSWER :D

Discussion

40.	Question : What is the phenomenon of sexual reproduction that involves different strains of thalli?
Answer» ANSWER :HETEROTHALLISM

Discussion

41.	Question : phenotypic and genotypic ratios are equal in
Answer» incomplete dominance Test cross All MONOHYBRID crosses Both (1)&(2) Answer :D

Discussion

42.	Question : Phenomenon of plasmolysis occurs when:
Answer» CELLS are KEPT in hypertonic solution cells are kept in HYPOTONIC solution cells are kept ISOTONIC solution none of these Answer :A

Discussion

43.	Question : Phenomenon of industrial melanism demonstrates
Answer» GEOGRAPHICAL isolation reproductive isolation natural selection induced MUTATION. SOLUTION :Refer to answer 41.

Discussion

44.	Question : Phenomenon of industral melanism demonstrates:
Answer» GEOGRAPHICAL ISOLATION NATURAL selection Reproductive isolation Induced isolation Answer :B

Discussion

45.	Question :Phenolic inhibitors occur in plants as
Answer» GLYCOSIDES turpenols indoles phospholipids Answer :A

Discussion

46.	Question : Phenomenal and rapid increase of population in a short period is called
Answer» NATURAL increase POPULATION growth Population EXPLOSION None of the above ANSWER :C

Discussion

47.	Question : ...........phase in crucial in Calvin cycle for uninterrupted and continuous cycle .
Answer» CARBOXYLATION PHASE REDUCTION phase REGENERATION phase All the above Answer :C

Discussion

48.	Question : Phase contrast scanning, light microscope was invented by
Answer» Fritz-Zernike Galileo galilie M KNOLL and E ruska J JANSEN and Z Janssen Answer :A

Discussion

49.	Question : Pharynx is a voice box.
Answer» ANSWER :LARYNX

Discussion

50.	Question : Phagocytic cells of blood are
Answer» NEUTROPHILS only Acidophils only Monocytes only Neutrophils and monocytes Answer :D

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : Photoreceptor cells are present in ……………………

Question :Photophosphorylation in chloroplast is most similar to which of the following mitochondrial reactions ?

Question : Photophosphorylaton is a process in which

Question :Photolysis of water during Photosynthesis occurs with the help of

Question : Photochemical smogs always contain :

Question : Photolysis of water

Question : Photochemical smong always contains

Question : Photochemical smog pollution does not contain :

Question : Photochemical smog is the product of .........(A) ozone reaction(B) soil contamination(C) water contamination(D) automobiles

Question : Photochemical reaction of nitrogen oxides with unsaturated hydrocarbons produces

Question : Photochemical smog contains Nox and SO_2.

Question : Photo synthetically active radiation (PAR)

Question : Photo oxidation of chlorophyll-a in the reaction centre is prevented by

Question : Photo centres in higher plants are

Question : Photo-oxidation of water results in the formation of:

Question : Phosphorylation during photosynthesis is

Question : Phosphorylation of glucose during glycolysis is catalyzed by

Question : Phosphorus is the major constituent of A.Biological membranes B. Nucleic acids C. Cellular energy transfer systems D. Proteins

Question : Phosphorus is present in the rocks in form of

Question : Phosphorus is needed by organisms to make

Question : Phosphorus has

Question : Phosphorus cycle : Sedimentary cycle Carbon cycle : _____

Question : Phosphorus cycle

Question : Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as

Question :Phosphoenol pyruvate (PEP) is the primary CO_2acceptor in :

Question : phi_(p) becomes negative in transpiring xylem tissue when

Question : Phica semilunaris is

Question : Pheromones are secreted:

Question : Pheromones are chemical messengers that help insect in (a) Communication (b) Sending alarm signals (c) Marking trails (d) Attracting males (e) Killing pests

Question : Pheretima and its close relatives obtain nourishment from

Question : Pheromone is:

Question : Phenylketonuria, Huntington's disease and sickle-cell anaemia are caused respectively due to disorders associated with

Question : Phenylketonuria (PKU) is inherited disease that is characterised by

Question : Phenylketonuria is a genetic disorder due to a defect in metabolism of the following.

Question : Phenylketonuria is

Question : Phenylketonuria is a genetic disorder of

Question : Phenylketonuria is a genetic disorder due to a defect in metabolism of the following

Question : Fill In The blank : The phenotypic ratio and genotypic ratio of monohybrid test cross is ……………………

Question : phenotypic ratio in plant Snapdragon in F_2 is:

Question : What is the phenomenon of sexual reproduction that involves different strains of thalli?

Question : phenotypic and genotypic ratios are equal in

Question : Phenomenon of plasmolysis occurs when:

Question : Phenomenon of industrial melanism demonstrates

Question : Phenomenon of industral melanism demonstrates:

Question :Phenolic inhibitors occur in plants as

Question : Phenomenal and rapid increase of population in a short period is called

Question : ...........phase in crucial in Calvin cycle for uninterrupted and continuous cycle .

Question : Phase contrast scanning, light microscope was invented by

Question : Pharynx is a voice box.

Question : Phagocytic cells of blood are