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11th Standard Biology English Medium - Important 1 Mark MCQ's Question Paper and Answer Key 2022 - 2023

Published on: 31/12/2022

QB365 provides a detailed and simple solution for every Possible Questions in Class 11 Biology Subject - Important 1 Mark MCQ's, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Questions:

Multiple Choice Question

50 x 1 = 50

Which of the following cell type is capable of giving rise to other cell types in sponges?

(a)

Pinacocytes

(b)

Archaeocytes

(c)

Thesocytes

(d)

Collenocytes

Which of the following statement is correct?

(a)

DNA is synthesized through out the cell cycle

(b)

Cell division is inhibited by cytokinin

(c)

Chromosome are condensed at S-Stage

(d)

Only extra chromosomal DNA is replicated at any stage of cell cycle.

Growth in plant height due to the activity of apical and intercalary meristems is called as ________________.

(a)

seady growth

(b)

stationary growth

(c)

primary growth

(d)

secondary growth

Match column A with B:

Column A	Column B
A) Long day plants	i) Sugarcane
B) Short long day plants	ii) Wheat
C) Short day plants	iii) Rice
D) Long short day plants	iv) Potato
E) Intermediate day plants	v) Barley
F) Day neutral plants	vi) Bryophyllum

(a)

A-i, B-iii, C-iv, D-vi E-ii, F-v

(b)

A-v, B-ii, C-iii, D-iv, E-i, F-iv

(c)

A-iv, B-i, C-ii, D-v, E-iii, F-vi

(d)

A-ii, B-iv, C-vi, D-i, E-v, F-iii

During vigorous exercise, how many times higher is the tidal volume than the normal state? Which of the below statement is correct?

(a)

2-10

(b)

4- 10

(c)

6-10

(d)

8- 10

Which of the following enzymes directly acts on proteins?

(a)

Pepsin

(b)

Pepsinogen

(c)

Trypsinogen

(d)

Chymotrypsinogen

The weak lipase is present in _______________.

(a)

Stomach

(b)

Mouth cavity

(c)

Duodenum

(d)

Jejunum

A hard tartar layer is formed by ____________.

(a)

Calcium, phosphorus

(b)

Calcium, magnesium

(c)

Calcium, fluorine

(d)

Magnesium, fluorine

When the heart beat is too high it is called __________

(a)

bradycardia

(b)

tachycardia

(c)

prandycardia

(d)

trachycardia

10.

Random blood sugar level is ___________.

(a)

70-100 mg/dL

(b)

80-120 mg/dL

(c)

70-110 mg/dL

(d)

70-140 mg/dL

11.

Which is false?

(a)

Blood from right side of heart is carried to lungs by pulmonary artery

(b)

Pleura is double covering of kindey

(c)

Pancreas is both exocrine & endocrine gland

(d)

Scurvy is due to vitamin C deficiency.

12.

Carboxypeptidase is secreted by ____________

(a)

Pancreas

(b)

Stomach

(c)

Salivary glands

(d)

Intestine

13.

Carbon dioxide is carried in the RBCs as

(a)

bicarbonate ions

(b)

carbon dioxide

(c)

carbonic acid

(d)

carbaminohaemoglobin

14.

What is the flower of Petunia Solanaceae?

(a)

Bracteate

(b)

Ebracteate

(c)

Physalis

(d)

Tubular

15.

What is the leaf of Solanumtuberosumin Solanaceae?

(a)

Tubers

(b)

Pinnately compound

(c)

Rhiphidium

(d)

Umbellate cyme

16.

What is the habit of Solanumtrilobatumin Solanaceae?

(a)

Solanaceae

(b)

Small trees

(c)

Lianas with prickles

(d)

Vines

17.

____________are the vegetative organs of the flowering plant.

(a)

Leaves, stem, fruits

(b)

Roots, stem, flowers

(c)

Roots, leaves, flowers

(d)

Roots, stem, leaves.

18.

DNA and RNA are polymers of monomers called ____________

(a)

Nucleoside

(b)

Nucleotide

(c)

Pyrimidine

(d)

Dinucleotide

19.

A test for the presence of starch by adding a solution of iodine gives __________

(a)

Greenish blue colour

(b)

Reddish green colour

(c)

blue-black colour

(d)

Violet-pink colour

20.

________ is the powerful growth inhibitor

(a)

Ethanol

(b)

Cytokinins

(c)

ABA

(d)

Auxin

21.

Which of the following reaction is not involved in Kreb's cycle.

(a)

Shifting of phosphate from 3C to 2C

(b)

Splitting of Fructose 1,6 bisphosphate of into two molecules 3C compounds

(c)

Dephosphorylation from the substrates

(d)

All of these

22.

The element which is not remobilized?

(a)

Phosphorous

(b)

Potassium

(c)

Calcium

(d)

Nitrogen

23.

Munch hypothesis is based on _______.

(a)

Translocation of food due to TP gradient and imbibition force

(b)

Translocation of food due to TP

(c)

Translocation of food due to imbibition force

(d)

None of the above

24.

When a leaf trace extends from a vascular bundle in a dicot stem, what would be the arrangement of vascular tissues in the veins of the leaf?

(a)

Xylem would be on top and the phloem on the bottom

(b)

Phloem would be on top and the xylem on the bottom

(c)

Xylem would encircle the phloem

(d)

Phloem would encircle the xylem

25.

During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

(a)

P = Acetylcholine, Q = Ca⁺⁺

(b)

P = Acetylcholine, Q =Na⁺

(c)

P = GABA, Q = Na⁺

(d)

P = Cholinesterase, Q = Ca⁺⁺

26.

Serum calcium level is regulated by _____.

(a)

Thyroxine

(b)

FSH

(c)

Pancreas

(d)

Thyroid and Parathyroid

27.

Match the following.

1. Bombyx mori	(i) Champa	(I) Muga
2. Antheraea assamensis	(ii) Mulberry	(II) Eri
3. Antheraea mylitta	(iii) Arjun	(III) Tassar
4. Attacus ricini	(iv) Castor	(IV) Mulberry

Select the correct one.

(a)

1 – ii – IV

(b)

2 – iii – II

(c)

3 - i - I

(d)

4 - iv - III

28.

Muscles are formed by ____.

(a)

myocytes

(b)

leucocytes

(c)

osteocytes

(d)

lymphocytes

29.

A healthy human breathes ____________

(a)

12 - 16 times / minute

(b)

7 times / minute

(c)

2 times / second

(d)

20 times / minute

30.

CO₂ is transported through blood to lungs as _____.

(a)

carbonic acid

(b)

oxyhaemoglobin

(c)

carbamino haemoglobin

(d)

carboxy haemoglobin

31.

Malpighian tubules remove excretory products from _____.

(a)

mouth

(b)

oesophagus

(c)

haemolymph

(d)

alimentary canal

32.

Absorption of glycerol, fatty acids and monoglycerides takes place by ______.

(a)

Lymph vessels within villi

(b)

Walls of stomach

(c)

Colon

(d)

Capillaries within villi

33.

An unconscious patient is rushed into the emergency room and needs a fast blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should you as her doctor, give her?

(a)

A^-

(b)

(c)

O⁺

(d)

O^-

34.

Which of the following have an open circulatory system?

(a)

Frog

(b)

Earthworm

(c)

Pigeon

(d)

Cockroach

35.

Which of the following animals has a true coelom?

(a)

Ascaris

(b)

Pheretima

(c)

Sycon

(d)

Taenia solium

36.

Molecular taxonomic tool consists of ______.

(a)

DNA and RNA

(b)

Mitochondria and Endoplasmic reticulum

(c)

Cell wall and Membrane proteins

(d)

All the above

37.

Enzyme and substrate complement each other like a ___________.

(a)

Pencil & eraser

(b)

Pen & Paper

(c)

Lock & key

(d)

all above

38.

The DNA strands are antiparallel because of:

(a)

Ester bond

(b)

Phosphodiester bond

(c)

Disulphide bond

(d)

Hydrogen bond

39.

What is Guanine?

(a)

Purine

(b)

Hormone

(c)

Enzyme

(d)

Pyrimidine

40.

The primary structure of proteins is due to __________.

(a)

Ionic bonds

(b)

Peptide bonds

(c)

Hydrogen bond

(d)

S-S Linkages

41.

The unique property of each amino acid is determined by its particular:

(a)

-COOH group

(b)

-NH₂ group

(c)

-R group

(d)

Peptide bond

42.

________ is a polysaccharide which is used as anticoagulant.

(a)

Keratan

(b)

Hyaluronic acid

(c)

Heparin

(d)

Inulin

43.

Roots are ______.

(a)

Descending, negatively geotrophic, positively phototropic

(b)

Descending, positively geotrophic, negatively phototrophic

(c)

Ascending, positively geotrophic, negatively phototrophic

(d)

Ascending, negatively geotrophic, positively phototrophic

44.

In an inflorescence where flowers are borne laterally in an acropetal succession the position of the youngest floral bud shall be ______.

(a)

Proximal

(b)

Distal

(c)

Intercalary

(d)

Anywhere

45.

___________ are considered as pollution indicators.

(a)

Mycorrhiza

(b)

Actinomycete

(c)

Lichens

(d)

Cyanobacteria

46.

The correct statement regarding Blue green algae is ______.

(a)

lack of motile structures

(b)

presence of cellulose in cell wall

(c)

absence of mucilage around the thallus

(d)

presence of floridean starch

47.

Which one of the following statement about virus is correct?

(a)

Possess their own metabolic system

(b)

They are facultative parasites

(c)

They contain DNA or RNA

(d)

Enzymes are present

48.

An example of feedback inhibition is

(a)

Cyanide action on cytochrome

(b)

Sulpha drug on folic acid synthesiser bacteria

(c)

Allosteric inhibition of hexokinase by glucose-6-phosphate

(d)

The inhibition of succinic dehydrogenase by malonate

49.

Sequences of which of the following is used to know the phylogeny.

(a)

mRNA

(b)

rRNA

(c)

tRNA

(d)

HnRNA

50.

Anaphase promoting complex APC is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in human cell, which of the following is expected to occur?

(a)

Chromosomes will be fragmented

(b)

Chromosomes will not condense

(c)

Chromosomes will not segregate

(d)

Recombination of Chromosomes will occur