CBSE 11TH BIOLOGY - Online Test
Q1. Fibroblasts, macrophages and mast cells are present in
Answer : Option D
Explaination / Solution:
Apart from being connective tissue, Areolar tissue is also protective in nature. It has large number of fibroblast cells which produce fibres. Mast cells, plasma cells and macrophages help to protect against pathogens and aid in tissue repair.
Q2. Who is called as “Father of taxonomy”
Answer : Option D
Explaination / Solution:
Carl Linnaeus. Carl Linnaeus, also known as Carl von Linné or Carolus Linnaeus, is often called the Father of Taxonomy. His system for naming, ranking, and classifying organisms is still in wide use today (with many changes
Q3. The hormone causing release of milk after the birth of young one is :
Answer : Option D
Explaination / Solution:
Mammary glands start releasing milk after parturition. The hormone causing release of milk after the birth of young one is Oxytocin.
Q4. The deficiency symptoms in nitrogen,potassium, magnesium is clearly visible first in
Answer : Option C
Explaination / Solution:
Nitrogen deficiency symptoms include poor plant growth, and leaves that are pale green or yellow.
Symptoms of potassium deficiency in plants include brown scorching and curling of leaf tips as well as chlorosis (yellowing) between leaf veins.
The main symptom of magnesium deficiency, chlorosis, or yellowing between leaf veins.
Q5. Which among the following is not in the wall of alimentary canal?
Answer : Option B
Explaination / Solution:
The wall of alimentary canal from oesophagus to rectum possesses four layers namely serosa, muscularis, sub-mucosa and mucosa.
Q6. Read the following about the surface of cerebral hemispheres
i. Is made up of the pia matter.
ii. Is greatly convoluted and called the cerebral cortex.
i. Is made up of the pia matter.
ii. Is greatly convoluted and called the cerebral cortex.
Answer : Option A
Explaination / Solution:
The layer of cells which covers the cerebral hemisphere is called cerebral cortex and is thrown into prominent folds.
Q7. Rhodophyta are commonly called red algae because of the predominance of pigment
Answer : Option A
Explaination / Solution:
The algal class Rhodophyta are commonly called as red algae because it contain red pigment, r-phycoerythrin along with chlorophyll a and d.
Q8. The membrane complex formed in folding of plasma membrane in prokaryotic cells is called
Answer : Option D
Explaination / Solution:
A special membranous structure is the mesosome which is formed by the extensions of plasma membrane into the cell.
Q9. Melvin Calvin use of radioactive in
Answer : Option D
Explaination / Solution:
The use of radioactive C-14 by him in algal photosynthesis studies led to the discovery that the first fixation product was a 3-carbon organic acid.
Q10. If TLC is 5500ml, IRV is 2950ml, ERV is 900ml and TV is 500ml then what will be value of RV ?
Answer : Option B
Explaination / Solution:
RV = TLC - IRV – ERV– TV.
substitute the values
RV = 5500-2950-900-500= 1150ml.
