Biology - Online Test
Q1. The endoskeleton is fully ossified and the long bones are pneumatic in
Answer : Option A
Explaination / Solution:
Endoskeleton is fully ossified (bony) and the long bones are hollow with air cavities (pneumatic) in class aves.
Q2. Assertion: Fallopian tubes ends in a funnel shaped structure called the infundibulum.
Reason: Infundibulum is covered with small finger like projections called fimbriae.
Answer : Option A
Explaination / Solution:
Fallopian tube extends from the left and right superior corners of the uterus to the edge of the ovaries. It end in a funnel shaped structure called Infundibulum which is covered with small finger like projections called fimbriae.
Q3. Which is the most abundant chemical for the living organisms?
Answer : Option D
Explaination / Solution:
Water is the most abundant chemical for the living organisms.
In adult men, about 60% of their bodies are water.
Q4. Haploid chromosome number is 12. What is the number in monosomic?
Answer : Option D
Explaination / Solution:
Monosomic is an aneuploidy in which a chromosome is deficient of its homologous causing genetic imbalance resulting in weaker than normal form. In normal form(2n) 24 chromosome should be present but 1 homologous pair is absent so, only 23 chromosome will be present in monosomic individual.
Q5. Which one of the following plant is commonly used as green manure?
Answer : Option A
Explaination / Solution:
Green manure is organic substance that increases the fertility of soil. Crotalaria juncea is grown into and ploughed to soil that decompose and increase the fertility.
Q6. Meghna suffers from allergic asthma. After a blood test her leucocyte count displayed an abnormal increase in the number of :
Answer : Option B
Explaination / Solution:
An absolute eosinophil count is a blood test that measures the number of white blood cells called eosinophils. Eosinophils become active when you have certain allergic diseases infections, and other medical conditions.
Q7. In mitochondria, protein accumulate in
Answer : Option B
Explaination / Solution:
In mitochondria, protein accumulate in intermembrane space between two layers of mitochondria.
Q8. The possible drawback of bioremediation method for oil spill containment is :
Answer : Option C
Explaination / Solution:
Bioremediation is a waste management technique that involves the use of organisms to neutralize pollutants from a contaminated site.
In this method large number of bacteria outcompete other organisms for oxygen creating a dead zone.Dead zones are low- oxygen, or hypoxic, areas in the world's oceans and lakes.
Q9. In telophase I, which of the following event takes place?
Answer : Option C
Explaination / Solution:
In telophase I, the nuclear membrane and nucleolus reappear indicating the process of completion od nuclear division . Meiosis II is similar to mitosis.
Q10. Technique associated with DNA amplification is
Answer : Option C
Explaination / Solution:
DNA amplification is done by using the technique of polymerase chain reaction in which millions of copies of DNA segments are produced.
