Biology - Online Test
Q1. Part of brain that acts as relay centre to receive and transmit general sensations except smell :
Answer : Option A
Explaination / Solution:
Thalamus is the part of brain that acts as relay centre to receiveand transmit general sensations except smell. Thalamus is located in the forebrain superior to the midbrain.
Q2. The algae that secretes and deposit calcium carbonate over their walls to contribute in producing coral reefs is
Answer : Option C
Explaination / Solution:
Red algae in the order Corallinales , characterized by a thallus that is hard because of calcareous deposits which contribute in producing coral reefs in sea water.
Q3. In prokaryotes, the reserved food material is stored in
Answer : Option B
Explaination / Solution:
Reserve material in prokaryotic cells are stored in the cytoplasm in the form of inclusion bodies.
Q4. What does A & B represent?
Answer : Option C
Explaination / Solution:
In figure above, A represent helicase and B represents single strand binding protein. These structures are formed during semi-conservative replication of DNA.
Q5. Conditions favouring decomposition are
Answer : Option C
Explaination / Solution:
Decomposition rate accelerate at high temperature and high humidity. At higher temperature and high humidity number of decomposer increases substantially that accelerate the decomposition.
Q6. What does represent in plant photosynthesis?
Answer : Option D
Explaination / Solution:
The key features of plant photosynthesis were known, namely, that plants could use light energy to make carbohydratesfrom and water, where represents glucose.
Q7. After a forceful expiration :
Answer : Option B
Explaination / Solution:
After a forceful expiration gaseous exchange continues uninterrupted because there is always a residual volume of air that continues the diffusion of gasese.
Q8. Which one of the following is commonly used in transfer of foreign DNA into crop plants?
Answer : Option B
Explaination / Solution:
Genetically modified foreign DNA is transferred into crops plants through a vector. Agrobacterium tumefaciens is most common bacterium used for this purpose.
Q9. Identify the odd combination of the habitat and the particular animal concerned
Answer : Option D
Explaination / Solution:
Dachigam National Park is located 22 kilometers from Srinagar, Jammu and Kashmir. It covers an area of 141 km. The name of the park literally stands for "ten villages" which could be in memory of the ten villages that were relocated for its formation.
The main animal species that Dachigam is known for is the hangul, or the Kashmir stag.
Q10. When the coelomic fluid serves as a skeleton it is known as
Answer : Option B
Explaination / Solution:
Coelomic fluids serves as a skeleton in some insects called as hydrostatic skeleton that help in maintaining shape and size of the body of organisms in absence of bone or cartilage.
