CBSE 11TH BIOLOGY - Online Test
Q1.
Read the following :
i. insects have taste receptors on their feets.
ii. crickets have ears on the legs.
iii. snakes are highly sensitive to air borne sounds.
iv. frogs have colour vision.
Answer : Option D
Explaination / Solution:
Insects have taste receptors on their feets.These receptor are located at different regions to get stimulus more accurately.
Crickets have ears on the legs and frogs have colour vision.
Q2. Which plant has fungal association in the form of mycorrhiza?
Answer : Option C
Explaination / Solution:
Roots in some genera of gymnosperms have fungal association in the form of mycorrhiza(Pinus).
Q3. The ribosomes of a polysome translate
Answer : Option C
Explaination / Solution:
Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. The ribosomes of a polysome translate the mRNA into proteins.
Q4. Carbon dioxide is fixed in
Answer : Option B
Explaination / Solution:
Photosynthesis occurs in two steps- light reaction and dark reaction. During light reaction ATP and NADPH molecules are formed and in dark reaction carbon dioxide is fixed.
Q5. A film of _____ lines lung alveoli that lowers _____ of the alveoli and makes breathing _____ :
Answer : Option D
Explaination / Solution:
A thin film of lecithin lines lung alveoli that lowers surface tension of the alveoli and makes breathing easier. The lining also reduces the friction of alveoli to avoid its damage.
Q6. The correct matched pair out of the following is :
Answer : Option C
Explaination / Solution:
Glucagon hormone released from pancreas increase the sugar level in blood in case deficiency of glucose. Parathyroid hormone is not hypocalcemin and TSH is not a neurohormone.
Q7. Which phylum shows this type of germinal layers shown below?
Answer : Option D
Explaination / Solution:
The germinal layer shows diploblastic. Phylum Coelenterata shows this type of germinal layers.
Q8. Nucleic acids are serve as
Answer : Option D
Explaination / Solution:
Nucleic acids carry hereditary information and are passed on from parental generation to progeny.
Q9. Match the following:
column A
a)Waller
b) Landsteiner
c) de castello and Steini
d) Landsteiner and Weiner
column B
i) rhesus antigen
ii) first ECG
iii) A, B and O blood group
iv) AB blood group
column A
a)Waller
b) Landsteiner
c) de castello and Steini
d) Landsteiner and Weiner
column B
i) rhesus antigen
ii) first ECG
iii) A, B and O blood group
iv) AB blood group
Answer : Option C
Explaination / Solution:
Waller performed first ECG. Landsteiner and Weiner discovered rhesus antigen (Rh). De castello and Steini shows the AB blood grouping and Landsteiner A,B,O blood grouping.
Q10. Net gain of ATP molecules per hexose during aerobic respiration is
Answer : Option D
Explaination / Solution:
Each glucose (hexose) during complete oxidation or aerobic respiration produce net 36 ATP molecules, which is produced in form of NADPH and FADH. Each NADPH produce 3 ATP and FADH two ATP molecules.
