12th Standard Biology English Medium Model 1 Mark Creative Questions (New Syllabus) 2020

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Questions:

Multiple Choice Question

52 x 1 = 52

Assertion (A): Oparin used the term coacervates
Reason (R): Coacervates are colloidal particles in aqueous environment

(a)

Both A and R are incorrect

(b)

Both A and R are correct

(c)

Both A and R are correct. R explains A.

(d)

A is correct R is incorrect

Assertion (A): Movement of organism from one place to another and back is called migration.
Reason (R): Eel is an example for anadromous migration.

(a)

Both A and R are correct R explain A

(b)

A is correct R is incorrect

(c)

R does not explain A

(d)

Both A and R are incorrect

UN conference on Sustainable development in 2012 was held at_______

(a)

Ruanda

(b)

Rio de Janeiro

(c)

Geneva

(d)

Stockholm

The sequence of bases in coding strand of DNA is GAGTTAGCAGGC, then the sequence of codons in primary transcript is ___________

(a)

C U C A U A C G C C C G

(b)

C U C A A U C G U C C G

(c)

U C A G A U C U G C G C

(d)

U U C A A U C G U G C G

Tetracycline is a ________________
(i) bactericidal antibiotic
(ii) bacteriastatic antibiotic
(iii) narrow spectrum antibiotic
(iv) Broad spectrum antibiotic

(a)

i and iii

(b)

ii and iii

(c)

i and iv

(d)

ii and iv

Whose experiment finally provided convincing evidence that DNA is the genetic material?

(a)

Griffith experiment

(b)

Avery, Macleod and McCarty's experiment

(c)

Hershey-Chase experiment

(d)

Urey-Miller's experiment

Mention the correct number of biodiversity hotspots identified throughout the world.

(a)

(b)

(c)

(d)

Which of the following statement(s) is true regarding cancer cells?
(a) Neoplasm or tumor cells show uncontrolled growth
(b) They are metastatic
(c) They lack contact inhibition
(d) They may be benign or malignant

(a)

(a) only

(b)

(b) and (c)

(c)

(d) only

(d)

All the above

Statement 1: YAC plasmid behaves like a yeast chromosome.
Statement 2: Circular YAC multiplies in bacteria.

(a)

Statement 1 is correct and Statement 2 is also correct.

(b)

Statement 1 is correct and Statement 2 is incorrect

(c)

Both the statements are incorrect.

(d)

Statement 1 is incorrect and Statement 2 is correct.

10.

Which blood group doesn't possess antibodies?

(a)

I^AI^B

(b)

I^OI^O

(c)

I^AO

(d)

I^BI^B

11.

What is the role of fimbriae?

(a)

Secretion of oestrogen and prolactin.

(b)

Helps in the collection of the ovum after ovulation

(c)

Attaches the ovary to the abdominal cavity.

(d)

Cormects oviduct with ovary

12.

Find out the proper sequence representing the parts of female reproductive system.

(a)

Vagina ⟶ Ovary ⟶ Uterus ⟶ Cervix ⟶ Infundibulum ⟶ Oviduct

(b)

Vagina ⟶ Ovary ⟶ Oviduct ⟶ Infundibulum ⟶ Cervix ⟶ Uterus

(c)

Ovary ⟶ Infundibulum ⟶ Oviduct ⟶ Uterus ⟶ Cervix ⟶ Vagina

(d)

Oviduct ⟶ Ovary⟶ Uterus⟶ Infundibulum ⟶ Vagina⟶ Cervix

13.

Identify the autotriploid plant

(a)

Potato

(b)

Coffee

(c)

Ground nut

(d)

Apple

14.

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

15.

The 1 : 2 : 1 ratio of co-dominance process Mendel's ___________

(a)

Law of dominance

(b)

Law of recessiveness

(c)

Law of segregation

(d)

Law of independent assortment

16.

Gregor Mendel ___________
(i) was born in Czechoslovakia
(ii) did his experiments in Pisum fulvum
(iii) was the first systemic researcher in genetics
(iv) Published his results in the paper "Experiments on Plant Hybrids"

(a)

All are correct

(b)

(ii), (iii), (iv) are correct

(c)

(i), (iii),(iv) are correct

(d)

(i), (iii), (iv) are correct

17.

Assertion (A): Anemophilous pollination occurs by animals.
Reason (R): Pollen grains are sticky for easy attachment on animals.

(a)

A is correct R is incorrect

(b)

R explains A.

(c)

Both A and R are incorrect.

(d)

Both A and Rare correct R does not explain A.

18.

Autecology deals with the study of ___________.

(a)

Community

(b)

Population

(c)

Individual species

(d)

Niche of species

19.

Name the person who discovered the pollen tube?

(a)

E. Strasburger

(b)

Hofmeister

(c)

Nehemiah Grew

(d)

G.B. Amici

20.

Identify the correct sequence of various zones from surface to depth in a pond ecosystem.

(a)

Profundal, limnetic, littoral and benthic

(b)

Benthic, littoral, profundal and limnetic

(c)

Limnetic, profundal, littoral and benthic

(d)

Littoral, limnetic, profundal and benthic

21.

Photosynthetically Active Radiation ranges between the wavelength of __________

(a)

400 - 600 nm

(b)

600 - 700 nm

(c)

400 - 500 nm

(d)

400 - 700 nm

22.

Synseeds are developed by encapsulating embryoids with __________.

(a)

Sodium chloride

(b)

Potassium iodide

(c)

Sodium alginate

(d)

Potassium dichromate

23.

Who is popularly called as the "father of green revolution in India"?

(a)

Nel Jeyaraman

(b)

Dr. M.S. Swaminathan

(c)

Dr. Nammalvar

(d)

N.G.P. Rao

24.

How many numbers of sacred grooves were documented in Tamil Nadu?

(a)

484

(b)

844

(c)

488

(d)

448

25.

Statement 1: Aloevera belongs to the family Asphodelaceae.
Statement 2: Jasminum grandiflorum belongs to the family of Oleaceae.

(a)

Statement 1 is correct and Statement 2 is also correct

(b)

Statement 1 is correct and Statement 2 is incorrect

(c)

Statement 1 is incorrect and Statement 2 is correct

(d)

Both the Statements are incorrect

26.

A scrubber in the exhaust of a chemical industrial plant removes

(a)

Gases like sulphur dioxide.

(b)

Particulate matter of the size 5 micrometer or above.

(c)

Gases like ozone and methane

(d)

Particulate matter of the size 2.5 micrometer or less

27.

Several hormones like hCG, hPL oestrogen and progesterone are produced by

(a)

ovary

(b)

placenta

(c)

fallopian tube

(d)

pituitary

28.

Which of the following statements, support the view that elaborate sexual reproductive process develops much later in the organic evolution?
i. Lower groups of organisms have simpler body design
ii. Asexual reproduction is common- in lower groups
iii. Asexual reproduction is common in higher groups of organisms
iv. The high incidence of sexual reproduction is in angiosperms and vertebrates.

(a)

i, ii and iii

(b)

i, iii and iv

(c)

i, ii and iv

(d)

ii, iii and iv

29.

Peripatus is the connection link between Annelida and _______________

(a)

Arthropoda

(b)

Platyhelminthes

(c)

Mollusca

(d)

Echinodermata

30.

According to Neo Darwinism change in the frequency of genes in population arise due to all Except.

(a)

Natural selection

(b)

Mutation

(c)

Struggle for existence

(d)

Variation

31.

The tolerable level of sound is _____________

(a)

140 db

(b)

120 db

(c)

100 db

(d)

2220 db

32.

Usage of _____ greatly reduces the risk of STI.

(a)

IUDS

(b)

Latex Condoms

(c)

Saheli

(d)

Lippes loop

33.

____________ is not a vestigial organ.

(a)

Nictitating membrane

(b)

Wisdom teeth

(c)

Ear muscles

(d)

Wing ofInsect

34.

Project Tiger was launched in the Jim Corbett National Park in the State of ___ in 1973.

(a)

Assam

(b)

Uttarakhand

(c)

Kerala

(d)

Gujarat

35.

An abnormal foetal heart beat rate or pattern indicates the foetus is not getting enough

(a)

Nutrients

(b)

Oxygen

(c)

Blood

(d)

Signals

36.

The incubation period for _____ can be more than 10 years.

(a)

HPV

(b)

HBV

(c)

Treponema

(d)

HIV

37.

________is not used as a biofertilizer

(a)

Bacillus thuringiensis

(b)

Rhizobium

(c)

Nostoc

(d)

Anabaena

38.

Which of the following is a behavioural adaptation?

(a)

Thick fur

(b)

camouflage

(c)

Sharp canines

(d)

Migration

39.

Rearrange the following steps as PCP in correct order.
1. Extension
2. Annealing
3. Denaturation

(a)

Annealing \(\rightarrow \) Extension \(\rightarrow \) Denaturation

(b)

Denaturation \(\rightarrow \) Annealing \(\rightarrow \) Extension

(c)

Annealing \(\rightarrow \)Denaturation \(\rightarrow \) Extension

(d)

Extension\(\rightarrow \) Annealing \(\rightarrow \) Denaturation

40.

The unequal divisions during oogenesis results in small cells called ______

(a)

oogonia

(b)

primary oocyte

(c)

secondary oocyte

(d)

polar bodies

41.

Among the extra embryonic membranes the _____ is the outer most membrane.

(a)

amnion

(b)

chorion

(c)

allantois

(d)

vitelline membrane

42.

__________is not linked to malaria

(a)

Haemozoin

(b)

TNF-a

(c)

Phencyclidine

(d)

Interleuin

43.

The incubation period of malaria is_______days.

(a)

(b)

(c)

(d)

44.

________is a dermotropic disease

(a)

Influenza

(b)

Measles

(c)

Cold

(d)

Rabies

45.

The "non-sense' codons refer to.

(a)

UAA UUU UGA

(b)

UUU ACU UAC

(c)

UAG UGA UAA

(d)

UAG UAA UUU

46.

The term nucleic acid was coined by ________.

(a)

Miescher

(b)

Hofmeister

(c)

Altman

(d)

Mcleod

47.

All of the following are methods of asexual reproduction except

(a)

Regeneration

(b)

Conjugation

(c)

Sporulation

(d)

Fragmentation

48.

______ is seen in Aurelia.

(a)

Binary fission

(b)

Regeneration

(c)

Sporulation

(d)

Strobilation

49.

In ______ the tissues of male and female genotype type form a mosaic

(a)

lIaplo-diploidy

(b)

Gynandromorphy

(c)

Genic balance

(d)

Lygaeus type

50.

_________ is an inborn error of metabolism caused due to autosomal recessive gene.

(a)

Thalassemia

(b)

Albinism

(c)

Phenylketonuria

(d)

Huntington's chorea

51.

_________ proposed the existence of 8 alleles at a single Rh locus.

(a)

Fischer

(b)

Landsteiner

(c)

Bernstein

(d)

Wiener

52.

______ is a second generation vaccine.

(a)

Polio

(b)

MMR

(c)

Hepatitis B

(d)

DPT

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Answers Key:

Multiple Choice Question

52 x 1 = 52

(a)
Both A and R are correct R explain A

(b)
Rio de Janeiro

(b)
C U C A A U C G U C C G

(d)
ii and iv

(d)
All the above

(a)
Statement 1 is correct and Statement 2 is also correct.

10.

(a)
I^AI^B

11.

(b)
Helps in the collection of the ovum after ovulation

12.

13.

(d)
Apple

14.

(b)
Syndesis ~ Tetrad ~ Crossing over ~ Terminalisation

15.

(b)
Law of recessiveness

16.

17.

18.

19.

(d)
G.B. Amici

20.

(d)
Littoral, limnetic, profundal and benthic

21.

(d)
400 - 700 nm

22.

23.

(b)
Dr. M.S. Swaminathan

24.

(d)
448

25.

(a)
Statement 1 is correct and Statement 2 is also correct

26.

(a)
Gases like sulphur dioxide.

27.

(b)
placenta

28.

29.

(a)
Arthropoda

30.

31.

(b)
120 db

32.

(b)
Latex Condoms

33.

(d)
Wing ofInsect

34.

(b)
Uttarakhand

35.

(b)
Oxygen

36.

(d)
HIV

37.

(a)
Bacillus thuringiensis

38.

(d)
Migration

39.

(b)
Denaturation \(\rightarrow \) Annealing \(\rightarrow \) Extension

40.

(b)
primary oocyte

41.

(b)
chorion

42.

43.

(b)
12

44.

(b)
Measles

45.

46.

47.

(d)
Fragmentation

48.

(d)
Strobilation

49.

(b)
Gynandromorphy

50.

(b)
Albinism

51.

(d)
Wiener

52.

12th Standard Biology English Medium Model 1 Mark Creative Questions (New Syllabus) 2020

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