CBSE 11TH BIOLOGY - Online Test
Q1. The correctly matched pair is :
Answer : Option A
Explaination / Solution:
Cats have binocular vision that is cat can use two eyes together. This kinds of vision helps in depth measurement and analysis of the image formed on retian.
Q2. Which one is a peat moss?
Answer : Option D
Explaination / Solution:
Sphagnum is also known as peat moss as it provide peat that have long been used as fuel.
Q3. Mitochondria is called “Power house of the cell” because
Answer : Option B
Explaination / Solution:
Mitochondria is called as power house of the cell because it contain enzyme for cellular respiration in which energy is released in form of ATP.
Q4. The process of synthesis of ATP from ADP in the presence of light are
Answer : Option B
Explaination / Solution:
The process of which ATP is synthesised by cells (in mitochondria and chloroplasts) is named phosphorylation. Photophosphorylation is the synthesis of ATP fromADP and inorganic phosphate in the presenceof light.
Q5.
The given graph shows consumption and ventilation during exercise so we can infer from this graph :
i. During exercise, oxygen consumption rate in our body increases.
ii. Neural stimulus allows abdominal muscles , which are a kind of smooth muscle to contract to facilitate ventilation while exercising.
iii. Increase in ventilation during exercise prevents large changes in the partial pressure of or
iv. The overall impact is breathing rate increases.
Answer : Option A
Explaination / Solution:
During exercise Oxygen consumption and ventilation changes drastically. Oxygen consumption rate in our body increases during exercise. Increase in ventilation during exercise prevents large change in the partial pressure of and to increase breathing rate.
Q6. During adolescence phase, Sunil’s body became abnormally large due to excessive growth of bones of his lower jaw and limbs.This abnormality is called
Answer : Option C
Explaination / Solution:
Acromegaly is the abnormal growth of the hands, feet and face caused by over production of growth hormone by pituitary gland.
Q7. A marine cartilaginous fish that can produce electric current is
Answer : Option B
Explaination / Solution:
Torpedo is a genus of rays, commonly known as electric rays, torpedo rays, or torpedoes. They are slow-moving bottom-dwellers capable of generating electricity as a defense and feeding mechanism.
Q8. Identify the incorrect pair in the following
Answer : Option B
Explaination / Solution:
Haemoglobin present in blood transport gases, RNA ( tRNA and mRNA) are involved in proteinsynthesis and steroids are used as sex stimulating chemicals but glucose is not a storage product.
Q9.
Read the following statements :
i. when the heart is not pumping blood sufficient to meet the need of the body then this state is called as heart attack.
ii. when the heart stops beating due to irreversible death of cells then this state is called as heart failure.
Answer : Option C
Explaination / Solution:
The state when the heart is not pumping blood sufficient to meet the need of the body then this state is called heart failure. When the heart muscles is suddenly damaged due to inadequate blood supply is called heart attack.
Q10. In electron transport system, the oxidation of one molecule of NADH produces
Answer : Option B
Explaination / Solution:
Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of produces 2 molecules of ATP.
