CBSE 11TH BIOLOGY - Online Test
Q1. Lysosomes are rich in hydrolytic enzymes such as
Answer : Option A
Explaination / Solution:
Lysosomes are found to be very rich in almost all types of hydrolytic enzymes (hydrolases – lipases, proteases, carbohydrases) optimally active at the acidic pH. These enzymes are capable of digesting carbohydrates, proteins, lipids and nucleic acids.
Q2. Which wavelength is inactive in PS I
Answer : Option B
Explaination / Solution:
Photosystem are light reactive centre to capture solar energy. Photosystem I is active below the wavelength of light below 780 nm. While photsystem II is active above 780 nm.
Q3. Read the following about blood pigments :
i. Hemoglobin is the pigment present in our blood and is iron containing protein.
ii. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
iii. Haemocyanin is much more efficient than haemoglobin.
i. Hemoglobin is the pigment present in our blood and is iron containing protein.
ii. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
iii. Haemocyanin is much more efficient than haemoglobin.
Answer : Option A
Explaination / Solution:
Haemoglobin is the pigment present in our blood and is iron containing protein. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
Q4. To exert their effect on the target cell, water soluble hormones will need to bind with
Answer : Option C
Explaination / Solution:
Hormones are released in trace amount from endocrine glands and to exert their effect on the target cell, water soluble hormones will need to bind with cell membrane bound receptors.
Q5. Choose the odd one out: Round worm, Hook worm, Filaria worm, Earthworm
Answer : Option B
Explaination / Solution:
Earthworm belongs to phylum Annelida where as all other worms belong to phylum Aschelminthes.
Q6.
What should be TDS of and in soft water?
Answer : Option D
Explaination / Solution:
TDS stands for total dissolved solids which are inorganic salts dissolved in water. The TDS of soft water should be up to 120 ppm.
Q7. The left atrium receives deoxygenated blood in :
Answer : Option A
Explaination / Solution:
Deoxygenated blood from body parts reaches to left atrium of lizards but in human beings left atrium receives the oxygenated blood.
Q8. The cytochrome c moves in between
Answer : Option D
Explaination / Solution:
Cytochrome c is a small protein attached to the outer surface of the inner membrane and acts as a mobile carrier for transfer of electrons between complex III and IV.
Q9. Bat is member of order
Answer : Option B
Explaination / Solution:
Bat is a member of order Chiroptera of class Mammalia. Bats are only mammals to have achieved powered fight in which forelimb is modified as wings.
Q10. At the end of meiosis II how many cells are formed?
Answer : Option B
Explaination / Solution:
Four haploid cells are formed at the end of meiosis II. It is reductional division resulting in halving of chromosome number in daughter cells.
