Inter Botany Important Questions for Eamcet 2017

1) Read the following statements and find out the incorrect statement.
a) The more the solute molecules, the higher is the
b) For a solution at atmospheric pressure,
c) Solute potential is always negative while pressure potential is usually positive.
d) None of the above

2) If a cell A with OP 10 bars and TP 4 bars is connected to cells B, A and D having OP and TP respectively 4 and 4, 10 and 5 and 7 and 3 bars, the flow of water will be
a) C to A, B and D
b) B to A, C and D
c) D to A, B and C
d) A to B, C and D

3) Assertion: Xylem vessels and tracheids are the part of apoplast. 
Reason: Xylem vessels and tracheids are non-living conduits.
a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
c) If assertion is true but reason is false.
d) If both assertion and reason are fals.

4) Match the column I and column II and select the correct combination.

Column I	Column II
a. Magnesium	i. Protein synthesis
b. Iron	ii. Nucleic acid synthesis
c.Calcium	iii. Overall metabolism is plants
d.Potassium	iv. Formation of mitotic spindle
e.Boron	v. Chlorophyll formation
f. Copper	vi. Pollen germination

A) a- v, b-i, d-ii, e-vi

B) b- v, c-I, d-iv, f-iii

C) a-ii, e-vi, c-iv, d-v

D) f-iii, b-v, a-ii, e-vi

5) Potassium is involved in 
a) Photosynthesis

b) Promoting many enzymatic activities that regulate plant process

c) Providing reddish pigmentation to fruit

d) Formation of vascular cambium

6) Steps in non-cyclic photophosphorylation include passage of electrons  along

a) FRS->FD->Cyt b6->Cytf->PC- >Chl a

b) Chl a->Cyt b6->Cytf->PC->PS I- >FRS->FD

c) Chl a->PQ->Cy b6->Cytf->PC- >PS I->FRS->FD

d) PQ->Cyt b6->Cytf->PC->PS I- >FRS->FD

7) Which statement about photosynthesis is false?

a) Enzymes required for carbon fixation are located in grana of chloroplasts

b) In green plants, both PS I and PS II are required for synthesis of NADPH + H+

c) Electron carriers of photophosphorylation are located on thylakoid membranes

d) Photosynthesis is a redox process in which water is oxidised and CO2 is reduced

8) Assertion: The whole scheme of transfer of electrons, starting from the PS II uphill to the acceptor, down the election transport chain to PS I, excitation of electrons, transfer to another acceptor, and finally downhill to NADP+ causing it to be reduced to NADPH+ H+ is called the Z scheme or cyclic photophosphorylation. 
Reason: Both ATP and NAD + H+ are synthesised by this kind of electron flow.

a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

c) If assertion is true but reason is false.

d) If both assertion and reason are  false.

9) What are the reasons why plants can get along without respiratory organs?

1) Each plant part takes care of its own gas exchange needs. There is very little transport of gases from one plant part to another.
2) Plants do not present great demands for gaseous exchange; root, stem and leaves respire at rates far lower than animals do.

3) The distance that gases must diffuse even in large, bulky plants is not great.

A) 1 and 2
B) 2 and 3

C) 3 and 1
D) 1, 2 and 3

10) In Krebs’ cycle number of molecules of CO2, NADH, FADH2 and ATP produced from one glucose molecule

a) 6 CO2, 8 NADH, 1 FADH2, 1 ATP

b) 6 CO2, 6 NADH, 2 FADH2, 2 ATP

c) 4 CO2, 6 NADH, 1 FADH2, 1 ATP

d) 4 CO2, 6 NADH, 2 FADH2, 2 ATP

11) In aerobic respiration one glucose produces

a) 8 NADH + 2 FADH2 + 2 ATP

b) 12 NADH + 2 FADH2 + 38 ATP

c) 12 NADH + 30 ATP + H2O

d) 10 NADH + 2 FADH2 + 2 ATP + 2 GTP

12) Find out the values of x, y and z in the given equation:

2(C51 H98 O6) + xO2->y CO2 + z H2O + Energy

a) x- 102, y-145, z- 98

b) x- 145, y- 102, z-98

c) x-98, y-102, z-145

d) x-145, y- 98, z-102

13) Chemiosmotic coupling hypothesis of oxidative phosphorylation proposes ATP synthesis because of

a) Proton gradient forms across inner membrane

b) Changed impermeability of inner mitochondrial membrane to ADP

c) High energy bonds are formed in mitochondrial proteins

d) ADP is pumped out of the matrix into inter membrane space

14) Which of the following is an example of differentiation?

a) The formation of tracheary elements (xylem tracheids and xylem vessels)

b) Formation of meristem like interfascicular cambium form fully differentiated parenchyma cells

c) Formation of meristem like cork cambium from fully differentiated parenchyma cells

d) Both B and C

15) The PGR, ethylene, could fit either the groups-plant growth promoters and inhibitors but it is largely an

a) Promoter of growth activities

b) Inhibitor of growth activities

c) Supporter of growth activities

d) Inducer of growth activities

16) Fill in the blanks:

1. Spraying sugarcane crop with...a... incr eases in the length of the stem, thus incre asing the yield by as much as...b...tonnes per acre.

2. ..c...does not occur naturally in plants.

3. Search for natural substances with cytokinin like activities led to the isolation of...d..from corn kernels and coconut milk.

A) a- auxins,            b- 10,      c- NAA,       d- zeatin

B) a- gibberellins,     b- 20,     c- zeatin,      d- kinetin

C) a- gibberellins,     b- 10,     c- zeatin,      d-kinetin

D) a-gibberellins,      b- 20,     c- Kinetin,    d- zeatin

17) Correct statements of the following.

I) Transduction is mediated by bacteriophages

II) Discovery of DNA as the genetic material was based on transformation experiments

III) Conjugation is genetic transfer through direct contact between two bacterial cells and is facilitated by conjugative plasmids.

IV) Transduction was discovered in Salmonella typhimurium

a) I, II & III only

b) III &IV only

c) II, III & IV only

d) I, II, III & IV

18) There are 1200 F- E.coli cells and 200F+E.coli cells in a test tube. Conjug ation occurs twice between opposite strains. At the end of conjugation the ratio between the number of F+ and F- is

a) 3: 4
b) 1: 1

c) 2 : 1
d) 4 : 3

19) In a Mendelian dihybrid cross the number of phenotypic recombinants is 36 in F2 generation. The number of organisms with the genotype that itself accounts for 1/4th of F2 generation is

a) 48
b) 24
c) 18
d)12

20) Observe the following with regard to Retroviruses.
S s R N A - > s s D N A - > d s D N A - >mRNA
a) Virion RNA and mRNA are of the same polarity
b) Virion RNA and sense strand of dsDNA are of the same polarity
c) Virion RNA and ssDNA formed from it are of the same polarity
d) a & b correct

21)

Column-I	Column-II	Column-III
A) First crystallized virus	Protein and nucleic acid	TMV
B) Enveloped virus	Envelope, protein and nucleic acid	Influenza virus
C) Spiked enveloped virus	Glycoproteins, proteins and nucleic acid	Measles virus
D) Prion	Protein coat only	Madcow disease
E) Viroid	Nucleic acid only	Potato spindle tuber disease

a) All except B are correct 

b) All except C are correct 

c) All except A are correct 

d) All are correct

22) When a green full pod producing pea plant is crossed to an yellow constricted pod producing pea plant in the progeny green fullpod and green constricted pod producing pea plants only are formed in 1:1 ratio. The genotype of tested individual is
a) GGFF
b) GgFF
c) GGFf
d) GgFf

23) Identify the incorrect combinations

Nutritional type	Source of carbon	Source of energy	Example
A) Photo-autotroph	Oxidation of organic substances	Sunlight	Chlorobium
B) Photo-heterotroph	Oxidation of Inorganic substances	Sunlight	Rhodospirillum
C) Chemo-autotroph	Atmosopheric CO2	Oxidation of Organic substances	Beggiotoa
D) Chemo-heterotroph	Organic substances	Organic substances	Bacillus

1) Except A 

2) Except C 

3) Except D 

4) Except B

24) When a heterozygous maize plant  with colored and full endosperm seeds is crossed to a plant with colorless and shrunken seeds, in the progeny 480 colored full endospe rm seed containing, 480 colourless shrunken seed containing 20 colored shrunken seed containing and 20 colorless and full endosperm seed containing plants are produced. What is the percentage of recombination?
a) 96
b) 4
c) 50
d) 2

25) When a grey colour seed producing pea plant is crossed to white colour seed producing pea plant, in the progeny 164 grey seed producing and 156 white seed producing plants are obtained. This cross is
a) Receprocal cross
b) Test cross
c) Incomplete dominance
d) Codominance

26) The sequence of nitrogen bases in a particular region of the non-coding strand to a DNA molecule was fou nd to be CATGTTTATCGC. What would be the sequence of nitrogen bases in the mRNA that is synthesized by the corresponding region of the coding strand in that DNA?
a) GUA CAA AUA GCC
b) GTA CAA ATA GCC
c) CAU GUU UAU CGC
d) CAA GAA TAU CGC

27) In the processing of hn RNA tailing involves the attachment of
a) Adenylate residueces at the -5’ end of hn RNA in a template dependent manner
b) Adenylate residues at the -5’ end of hn RNA in a template independent manner
c) Adenylate residues at the -3’ end of hn RNA in a template independent manner
d) Guanosine residues at the -5’ end of hn RNA in a template independent manner

28) What would happen if a cistron coding a polypeptide of 50 amino acids, 25th codon UGC is mutated to UAA
a) A polypeptide with 24 amino acids is formed
b) a polypeptide with 49 amino acids is formed
c) A protein with 25 amino acids is formed
d) A protein with 50 amino acids is  formed

29) Given below is the sequence of codons in mRNA ready for translation
5’ AUG UUU GGG UCU UCG UGA3’. The polypeptide contains
a) Methionine- valine- proline-serine-glycine
b) Methionine- phenylalanineglycine-serine-serine
c) Methionine-serine- glycinevaline-serine
d) Phenylalanine- valine- prolineglycine

30) What is the amino acid sequence in the polypeptide segment translated from the m-RNA base sequence of AUG-UUUUCC-GGG-UCG?
a) Serine-glycine-serinephenylalamine-serine
b ) M e t h i o n i n e - Phenylalanine-serine-glycine-serine
c) Serine-serine-phenylalanine-glycine-serine
d) Phenylalanine-serine-serine-glycine-serine

33) Assertion: When an alien piece of DNA integrated into the genome of the recipient, it may multiply and be inherited along with host DNA
Reason: The alien piece of DNA has become part of recipient’s chromosome which has a specific sequence known as ‘origin of of replication’
A) Both A and R are correct and R is correct explanation of A
B) Both A and R are correct but R is not correct explanation of A
C) A is correct but R is not correct
D) A is not correct but R is correct

34) Untrue regarding the target site in ds DNA for the action of E.co.RI is
A) It consists of 4 G=C and 2A=T pairs
B) It’s length is 20.4 A0
C) The polarity of Sticky ends of fragments is 5’ TTAA3’
D) It contains 14 Hydrogen bonds
1) A,B
2) C,D
3) A,C
4) B,D

35) Some foreign DNA fragment is attached to Cla I site of p BR322. This recombinant vector is used to transition Escherichia coli host cells. The cells subjected to transformation are plated on two different media-one containing ampicillin and the other containing tetracycline. The transformed cells containing the recombinant vector
a) will grow on both tetracycline containing and ampicillin containing media
b) will not grow on either tetracycline containing or ampicillin containing media
c) will grow on tetracycline but not on ampicillin containing medium
d) will grow on ampicillin but not on tetracycline containing medium

36) A: Restriction endonucleases are also called molecular scissors’
Reason: When fragments generated by restriction endonucleases are mixed, they join together due to their sticky ends.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true and R is not the correct explanation of A.
c) A is true, R is false
d) A is false but R is true

37) Transgenic plants are
a) produced by a somatic embryo in artificial medium
b) generated by introducing foreign DNA into a cell and regenerating a plant from that cell.
c) Produced after protoplast fusion in artificial medium
d) grown in artificial medium after hybridization in the field

38) What is true?
a) Flavr-Savr tomato has more ethylene for improving taste
b) Bt in Bt cotton signifies biotechnology
c) Anticoagulant hirudin is produced by transgenic Brassica napus seeds
d) Somatic hybridization involves fusion of two complete cells with desired genes

39) Cry II Ab and Cry I Ab produce toxins that control.
a) Cotton bollworms and corn borer respectively
b) Corn borer and cotton bollworm respectively
c) Tobacco budworms and nematodes respectively
d) Corn borer and Tobacco budworms respectively

40) Chlorella and Spirulina which are grown to harvest SCP are
1) Unicellular green alga and filamentous blue green alga respectively
2) Filamentous blue green alga and unicellular green alga respectively
3) Bakers Yeast and Torula yeast respectively
4) Filamentous fungus and unicellular fungus respectively

41) Jaya and Ratna are
a) Better yielding semidwarf varieties of Rice developed in Mexico
b) Better yielding, semidwarf varieties of Rice developed in India
c) Semi-dwarf and disease resistant Rice varietie developed in IRRI at Philippines.
d) Disease resistant variety of Rice developed in Taiwan

42) Study the following lists
         List-I                List-II
A) Gerplasm           I Steam sterilizer
B) Autoclave         II Variations through tissue culture
C) Micropropa      III Seed surface gation sterilization
D) Somaclonal      IV Entrie collection havvariations of seeds with all divers alleles
                            V Mass production of plants invitro
The correct match is
1) IV II V III
2) V IV III I
3) IV I V II
4) IV III V II

43) Yield of soybean and Red gram could be increased by employing the following as biofertilizer
I) Glomus 
II) Azospirillum
III) Cyanobacteria 
IV) Rhizobium
1) I only
2) I and II
3) I, II and IV
4) I & IV