Biology - Online Test
Q1. Towards the centre of the inner concave surface of the kidney is a notch called:
Answer : Option D
Explaination / Solution:
On the medial margin of the kidney is concave region called the renal hilum. The renal hilum is the entrance to the renal sinus. Structures such as the renal veins, artery, nerves and lymphatic vessels are located in the renal hilum.
Q2. Organic compounds first evolved in earth required for origin of life were
Answer : Option C
Explaination / Solution:
The organic compounds first evolved in earth required for origin of life were proteins and nucleic acids. Proteins are made of amino acids arranged in different order and DNA and RNA are nucleic acids.
Q3. The characteristic feature of which cells have lignified thickening at the corner?
Answer : Option C
Explaination / Solution:
Sclerenchyma consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.
Q4. Maximum growth occurs in
Answer : Option A
Explaination / Solution:
In growth curve, maximum growth occurs in exponential phase of sigmoid curve. During this periods cells divide mitotically to increase length and girth of the plant.
Q5. Hierarchical classification refers to
Answer : Option C
Explaination / Solution:
Classification is not a single step process but involves hierarchy of steps in which each step represents a rank or category. Hence, the correct option is To rank one above the other.
Q6. Look at the following figure of movement of the thin filaments
The label x, y, and z are respectively
The label x, y, and z are respectively
Answer : Option A
Explaination / Solution:
The label x is H-zone, y is I band and z is A band.
Q7. The correct result of ATPase activity that occurs during muscle contraction is :
Answer : Option A
Explaination / Solution:
ATPase enzyme acts on myosin to act on ATP to convert into ADP. The activated myosin combine with actin for contraction.
Q8. First gene therapy was done for
Answer : Option A
Explaination / Solution:
A four-year old girl became the first gene therapy patient on September 14, 1990 at the NIH Clinical Center. She has adenosine deaminase (ADA) deficiency, a genetic disease which leaves her defenseless against infections.
Q9. Sexually transmitted disease can be transmitted through sharing of injection or from mother to foetus is
Answer : Option A
Explaination / Solution:
AIDS can be transmitted from infected partner to healthy partner during sexual intercourse. Beside this this syndrome can be transmitted from infected mother to their child and through sharing of injection and blood transfusion.
Q10. The instrument used for measuring rate of transpiration is
Answer : Option D
Explaination / Solution:
Potometer is used for measuring rate of transpiration in plant. Loss of water in form of water vapour is called transpiration.
Repeated question
