CBSE 11TH BIOLOGY - Online Test
Q1. Transport of water and mineral in plants take place through
Answer : Option C
Explaination / Solution:
Transport of water and mineral in plant take place through xylem tissue present in vascular bundles. Vessels and tracheids are main water conducting elements of xylem.
Q2. Where is ciliated epithelium found in human body?
Answer : Option D
Explaination / Solution:
The ciliated epithelium is mainly present in the inner surface of hollow organs like bronchioles and fallopian tubes.
Q3. The five kingdom classification was proposed by
Answer : Option A
Explaination / Solution:
Five kingdom classification was proposed by R.H. Whittaker in 1969. The kingdoms identified by him were Monera, Protista,Fungi, Plantae and Animalia.
Q4. Which of the following is not a mixed/composite gland?
Answer : Option A
Explaination / Solution:
A gland that contain both exocrine and endocrine portion is called mixed or composite gland. These glands secretes both hormone and enzymes. Pineal gland is an example of endocrine gland.
Q5. Zn2+ is an activator of
Answer : Option C
Explaination / Solution:
Zn2+ also serves as an activator of a group of enzymes: alcohol dehydrogenase, pyridine nucleotide dehydrogenase, carboxypeptidase.
Q6. The teeth occur in human beings are
Answer : Option A
Explaination / Solution:
Each tooth is embedded in a socket of jaw bone called thecodont. Human being forms two sets of teeth during their life temporary milk or deciduous teeth replaced by a set of permanent or adult teeth called diphyodont. An adult human has 32 permanent teeth which are of four different types called heterodont.
Q7. Nissl’s granules are absent in :
Answer : Option B
Explaination / Solution:
Nissl’s grains are mainly present in cyton and dendrite. These granules are rough endoplasmic reticulum with rosettes of free ribosome, the site for protein synthesis. It is absent in axon.
Q8. In Phaeophyceae, the food stored in the form of
Answer : Option D
Explaination / Solution:
In Phaeophyceae, food is stored as complex carbohydrates which may be in the form of laminarin or mannitol.
Q9. New cells generate from
Answer : Option C
Explaination / Solution:
All living organisms are composed of cells and products of cells.all cells arise from pre-existing cells.
Q10. The chief pigment associated in process of photosynthesis is
Answer : Option C
Explaination / Solution:
Chlorophyll a, shows higher rate of photosynthesis.so, chlorophyll a is the chief pigment associated with photosynthesis.
