By QB365 on 31 Dec, 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.
11th Standard
Biology
Answer All The Questions
Which one of the following statement about virus is correct?
Possess their own metabolic system
They are facultative parasites
They contain DNA or RNA
Enzymes are present
The correct statement regarding Blue green algae is ______.
lack of motile structures
presence of cellulose in cell wall
absence of mucilage around the thallus
presence of floridean starch
Roots are ______.
Descending, negatively geotrophic, positively phototropic
Descending, positively geotrophic, negatively phototrophic
Ascending, positively geotrophic, negatively phototrophic
Ascending, negatively geotrophic, positively phototrophic
In an inflorescence where flowers are borne laterally in an acropetal succession the position of the youngest floral bud shall be ______.
Proximal
Distal
Intercalary
Anywhere
Sequences of which of the following is used to know the phylogeny.
mRNA
rRNA
tRNA
HnRNA
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?
Chromosomes will be fragmented
Chromosomes will not condense
Chromosomes will not segregate
Recombination of Chromosomes will occur
An example of feedback inhibition is
Cyanide action on cytochrome
Sulpha drug on folic acid synthesiser bacteria
Allosteric inhibition of hexokinase by glucose-6-phosphate
The inhibition of succinic dehydrogenase by malonate
Molecular taxonomic tool consists of ______.
DNA and RNA
Mitochondria and Endocplamic reticulum
Cell wall and Membrane proteins
All the above
Which of the following animals has a true coelom?
Ascaris
Pheretima
Sycon
Taenia solium
Which of the following cell type is capable of giving rise to other cell types in sponges?
Pinacocytes
Archaeocytes
Thesocytes
Collenocytes
Which of the following have an open circulatory system?
Frog
Earthworm
Pigeon
Cockroach
Absorption of glycerol, fatty acids and monoglycerides takes place by ______.
Lymph vessels within villi
Walls of stomach
Colon
Capillaries within villi
CO2 is transported through blood to lungs as _____.
carbonic acid
oxyhaemoglobin
carbamino haemoglobin
carboxy haemoglobin
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-
AB
O+
O-
Malpighian tubules remove excretory products from _____.
mouth
oesophagus
haemolymph
alimentary canal
Muscles are formed by ____.
myocytes
leucocytes
osteocytes
lymphocytes
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.
P = Acetylcholine, Q = Ca++
P = Acetylcholine, Q =Na+
P = GABA, Q = Na+
P = Cholinesterase, Q = Ca++
Serum calcium level is regulated by _____.
Thyroxine
FSH
Pancreas
Thyroid and Parathyroid
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.
1 – ii – IV
2 – iii – II
3 - i - I
4 - iv - III
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?
Xylem would be on top and the phloem on the bottom
Phloem would be on top and the xylem on the bottom
Xylem would encircle the phloem
Phloem would encircle the xylem
Munch hypothesis is based on _______.
Translocation of food due to TP gradient and imbibition force
Translocation of food due to TP
Translocation of food due to imbibition force
None of the above
The element which is not remobilized?
Phosphorous
Potassium
Calcium
Nitrogen
Which of the following reaction is not involved in Kreb's cycle.
Shifting of phosphate from 3C to 2C
Splitting of Fructose 1,6 bisphosphate of into two molecules 3C compounds
Dephosphorylation from the substrates
All of these
________ is the powerful growth inhibitor
Ethanol
Cytokinins
ABA
Auxin
___________ are considered as pollution indicators.
Mycorrhiza
Actinomycete
Lichens
Cyanobacteria
____________are the vegetative organs of the flowering plant.
Leaves, stem, fruits
Roots, stem, flowers
Roots, leaves, flowers
Roots, stem, leaves.
What is the habit of Solanumtrilobatumin Solanaceae?
Solanaceae
Small trees
Lianas with prickles
Vines
What is the leaf of Solanumtuberosumin Solanaceae?
Tubers
Pinnately compound
Rhiphidium
Umbellate cyme
What is the flower of Petunia Solanaceae?
Bracteate
Ebracteate
Physalis
Tubular
Which of the following statement is correct?
DNA is synthesized through out the cell cycle
Cell division is inhibited by cytokinin
Chromosome are condensed at S-Stage
Only extra chromosomal DNA is replicated at any stage of cell cycle.
________ is a polysaccharide which is used as anticoagulant.
Keraton
Hyaluronic acid
Heparin
Inulin
The unique property of each amino acid is determined by its particular:
-COOH group
-NH2 group
-R group
Peptide bond
The primary structure of proteins is due to __________.
Ionic bonds
Peptide bonds
Hydrogen bond
S-S Linkages
What is Guanine?
Purine
Hormone
Enzyme
Pyrimidine
The DNA stands are antiparallel because of:
Ester bond
Phosphodiester bond
Disulphide bond
Hydrogen bond
Enzyme and substrate complement each other like a ___________.
Pencil & eraser
Pen & Paper
Lock & key
all above
A test for the presence of starch by adding a solution of iodine gives __________
Greenish blue colour
Reddish green colour
blue-black colour
Violet-pink colour
DNA and RNA are polymers of monomers called ____________
Nucleoside
Nucleotide
Pyrimidine
Dinucleotide
Carboxypeptidase is secreted by ____________
Pancreas
Stomach
Salivary glands
Intestine
A hard tartar layer is formed by ____________.
Calcium, phosphorus
Calcium, magnesium
Calcium, fluorine
Magnesium, fluorine
The weak lipase is present in _______________.
Stomach
Mouth cavity
Duodenum
Jejunum
Which of the following enzymes directly acts on proteins?
Pepsin
Pepsinogen
Trypsinogen
Chymotrypsinogen
An healthy human breathes ____________
12 - 16 times / minute
7 times / minute
2 times / second
20 times / minute
Carbon dioxide is carried in the RBCs as
bicarbonate ions
carbon dioxide
carbonic acid
carbaminohaemoglobin
Which is false?
Blood from right side of heart is carried to lungs by pulmonary artery
Pleura is double covering of kindey
Pancreas is both exocrine & endocrine gland
Scurvy is due to vitamin C deficiency.
During vigorous exercise, how many times higher is the tidal volume than the normal state? Which of the below statement is correct?
2-10
4- 10
6-10
8- 10
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-i, B-iii, C-iv, D-vi E-ii, F-v
A-v, B-ii, C-iii, D-iv, E-i, F-iv
A-iv, B-i, C-ii, D-v, E-iii, F-vi
A-ii, B-iv, C-vi, D-i, E-v, F-iii
Growth in plant height due to the activity of apical and intercalary meristems is called as ________________.
seady growth
stationary growth
primary growth
secondary growth
Random blood sugar level is ___________.
70-100 mg/dL
80-120 mg/dL
70-110 mg/dL
70-140 mg/dL
When the heart beat is too high it is called __________
bradycardia
tachycardia
prandycardia
trachycardia
Answers
They contain DNA or RNA
lack of motile structures
Descending, positively geotrophic, negatively phototrophic
Proximal
rRNA
Chromosomes will not segregate
Allosteric inhibition of hexokinase by glucose-6-phosphate
DNA and RNA
Pheretima
Archaeocytes
Cockroach
Lymph vessels within villi
carbamino haemoglobin
O+
haemolymph
myocytes
P = Acetylcholine, Q = Ca++
Thyroid and Parathyroid
1 – ii – IV
Xylem would be on top and the phloem on the bottom
Translocation of food due to TP
Calcium
All of these
ABA
Lichens
Roots, stem, leaves.
Lianas with prickles
Pinnately compound
Bracteate
Only extra chromosomal DNA is replicated at any stage of cell cycle.
Heparin
-R group
Peptide bonds
Purine
Phosphodiester bond
Lock & key
blue-black colour
Nucleotide
Pancreas
Calcium, magnesium
Stomach
Pepsin
12 - 16 times / minute
carbaminohaemoglobin
Pleura is double covering of kindey
4- 10
A-v, B-ii, C-iii, D-iv, E-i, F-iv
primary growth
70-140 mg/dL
tachycardia