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12th Standard English Medium Biology (Botany) Subject Creative 1 Mark Questions with Solution Part - I updated Creative Questions

Published on: 13/05/2022

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Std: 12th Standard - Biology

chapter: - Creative Questions

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Questions:

Multiple Choice Question

25 x 1 = 25

Assertion (A): DMH -11 is a transgenic mustard.
Reason (R): It is developed by using barnase/ barstar technology.

(a)

Both A and R are wrong.

(b)

A is right R is wrong.

(c)

R explains A.

(d)

A and R are right, R does not explain A.

A vector should________
(i) contain suitable marker
(ii) contain ori site
(iii) have poly linkess
(iv) be small in size

(a)

i, ii and iii

(b)

ii, iii and iv

(c)

i, ii and iv

(d)

all the above

Pick out the mismatched pair(s):
(i) Amphotericin-B - Streptomyces notatum
(ii) Penicillin - Penicillium nodosus
(iii) Streptomycin - Streptomyces griseus
(iv) Tetracycline - Streptomyces aureofaciens

(a)

i and ii

(b)

ii and iii

(c)

iii and iv

(d)

i only

Observe the gene sequence and identify the types of aberration ABC BCD E F?

(a)

Tandem duplication

(b)

Simple duplication

(c)

Reverse tandem duplication

(d)

Displaced tandem duplication

Statement 1: Self-sterility in Nicotiana is controlled by multiple alleles.
Statement 2: Multiple alleles are always responsible for the same character.

(a)

Statement 1 is correct and Statement 2 is incorrect

(b)

Statement 1 is incorrect and Statement 2 is correct

(c)

Both the statements are correct

(d)

Both the statements are incorrect

Sharbati Sonora is a mutant wheat variety which is developed by irradiating the seeds with _________

(a)

Thermal neutrons

(b)

Gamma radiation

(c)

X-rays

(d)

UV radiations

Which is not a non-ionizing radiation?

(a)

X-rays

(b)

Gamma rays

(c)

Alpha rays

(d)

UV rays

Mechanism of crossing over involves the following stages. Select the correct sequence.

(a)

Tetrad stage ~ Synapsis ~ Bivalent stage ~ cross over

(b)

Syndesis ~ Tetrad ~ Crossing over ~ Terminalisation

(c)

Terminalisation ~ Tetrad ~ Bivalent ~ Cross over

(d)

Cross over ~ Bivalent ~ Tetrad ~ Terminalisation

Identify the syntenic gene from the given genes sequence of a chromosome G-H-I-J-K-L-M-A-B

(a)

G and H

(b)

J, K and L

(c)

G and B

(d)

A and B

10.

Name the scientist(s) who rediscovered the Mendelian work?
(i) Hugo de Vries
(ii) Carl Correns
(iii) Tschermak
(iv) T.H. Morgan

(a)

i and iv

(b)

i, ii and iv

(c)

i, ii and iii

(d)

ii, iii and iv

11.

Identify the allelic interaction

(a)

Dominant epistasis

(b)

Co-dominance

(c)

Recessive epistasis

(d)

Duplicate genes

12.

Ratio of recessive epistasis is ___________

(a)

12: 3 : 1

(b)

9: 7

(c)

9: 3 : 4

(d)

9: 6 : 1

13.

Identify the incorrect statement

(a)

In incomplete dominance, the traits are blended not the genes

(b)

Incomplete dominance is noticed in Mirabilis jalapa by Carl Correns

(c)

It is a type of Intragenic gene interaction

(d)

Incomplete dominance F₂ ratio is 1 : 3 : 1

14.

Assertion (A): Test cross is done between F₂ hybrid with F₁ recessive
Reason (R): It helps to identify the homozygosity of hybrids

(a)

A and R are correct R explains A

(b)

A and R are incorrect

(c)

A is correct R is incorrect

(d)

A is incorrect R is correct

15.

Identify the correct sequence of anther wall layers from periphery towards core part.

(a)

Epidermis ⟶ endothelium ⟶ stomium ⟶ tapetum

(b)

Epidermis ⟶ middle layer ⟶ endothecium ⟶ endothelium

(c)

Epidermis ⟶ endothelium ⟶ middle layers ⟶ tapetum

(d)

Epidermis ⟶ endothelium ⟶ endothecium ⟶ tapetum

16.

An allele is__________

(a)

another word for a gene

(b)

Alternate forms of a gene

(c)

morphological expression of a gene

(d)

genetic make up of an organism

17.

Observe the diagram and select the correct option mentioning the parts A, B, C and D.

(a)

A	B	C	D
Synergid	Egg	polar nuclei	Antipodals

(b)

A	B	C	D
Antipodals	Synergid	polar nuclei	Egg

(c)

A	B	C	D
Egg	Synergid	Antipodals	polar nuclei

(d)

A	B	C	D
Antipodals	polar nuclei	Egg	Synergid

18.

Examine the figures and name the respective type of ovule.

(a)

A	B	C	D
Campylotropous	Amphitropous	Circinotropous	Anatropous

(b)

A	B	C	D
Anatropous	Hemianatropous	Amphitropous	Campylotropous

(c)

A	B	C	D
Campylotropous	Circinotropous	Hemianatropous	Anatropous

(d)

A	B	C	D
Hemianatropous	Campylotropous	Amphitropous	Circinotropous

19.

Identify the type of ovule, where the nucellus acquires a horse-shoe shaped structure.

(a)

Anatropous

(b)

Hemianatropous

(c)

Campylotropous

(d)

Amphitropous

20.

Identify the correct statement.

(a)

Grafting is a modem method of artificial propagation.

(b)

The plant which is used for graft is Scion.

(c)

In tongue grafting, the scion bud is placed inside the incision beneath bark.

(d)

Grafting is usually carried out in monocot plants.

21.

Assertion (A): Epidermis is protective in function.
Reason (R): Epidermis is outermost unilayer of another wall.

(a)

A is correct R is incorrect.

(b)

R explains A.

(c)

Both A and R are incorrect.

(d)

Both A and R are correct. R does not explain A.

22.

Which of the following characters does not exist in Ornithophilous flowers?

(a)

Huge sized flowers

(b)

Bright coloured

(c)

Scented flowers

(d)

Nectar is secreted in large

23.

Pick out the non-spermous seed

(a)

Wheat

(b)

Sunflower

(c)

Bean

(d)

Orchids

24.

Innermost layer of anther wall is ________________

(a)

Endothecium

(b)

Endothecum

(c)

Endothelium

(d)

Tapetum

25.

Identify the incorrect statement:
(a) Explants are surface sterilized
(b) Nutrient media are autoclaved
(c) Culture rooms are UV radiated for 15 minutes
(d) Glasswares and accessories are autoclaved

(a)

a only

(b)

b and c

(c)

d only

(d)

none of the above