Zoology - Online Test
Q1. The property which doesn’t belong to nerve fibres is :
Answer : Option A
Explaination / Solution:
Nerve fibres are specialized to transmit impulses form one part of the body to other. Nerve fibres do not shows the property of elasticity and contractility.
Q2. Cytoskeleton is made of
Answer : Option A
Explaination / Solution:
Cytoskeleton is a series of intercellular proteins that help a cell with shape, support andmovement. So, cytoskeleton is made up of proteinaceous filaments.
Q3. By which bonds the purine & pyrimidine pairs of Complementary Strands of DNA held together?
Answer : Option D
Explaination / Solution:
Three hydrogen bonds form between guanine and cytosine. Two hydrogen bonds form between adenine and thymine or adenine and uracil. Complementary pairs always involve one purine and one pyrimidine base.
Q4. Producers in the aquatic ecosystem are :
Answer : Option A
Explaination / Solution:
Phytoplanktons are small floating photosynthetic unicellular plant. In the aquatic ecosystem phytoplankton are producers that fix solar energy by the process of photosynthesis.
Q5. Skin is the only respiratory organ in :
Answer : Option C
Explaination / Solution:
There are no special respiratory organs in Hirudinaria. In addition to its primary role of a protective covering, the skin also serves a respiratory function. It is provided with a rich supply of haemocoelomic fluid in an extensive system of capillaries and capillary loops, which penetrate into the spaces between the inner ends of the epidermal cells.
Q6. Cloning is not meant for
Answer : Option C
Explaination / Solution:
Cloning is the method of increasing the number of individual having similar genetic organization. It is not a means of reproduction or production of the organism.
Q7. Biological diversity level that doesn’t exist is:
Answer : Option C
Explaination / Solution:
Biological diversity level is classified as alpha, beta and gamma. Delta is not a biological diversity level.
The terms alpha, beta, and gamma diversity were all introduced by R. H. Whittaker to describe the spatial component of biodiversity. Imagine that you have a landscape containing of a number of separate sites and habitats. Alpha diversity is just the diversity of each site (local species pool). Beta diversity represents the differences in species composition among sites. Gamma diversity is the diversity of the entire landscape (regional species pool).
Q8. In Coelenterates, the cell shows
Answer : Option D
Explaination / Solution:
In coelenterates, the arrangement of cells is more complex. Here, the cells performing the same function are arranged into tissues, hence is called tissue level of organisation.
Q9. External genitalia of human female is called as
Answer : Option D
Explaination / Solution:
The external genitalia of human female is called vulva. Vulva includes mons pubis, labia majora, labia minora, hymen and clitoris.
Q10. The inhibition of enzyme activity by the presence of a chemical that competes with the substrate for binding to the active site of the enzyme is called
Answer : Option C
Explaination / Solution:
The inhibition of enzyme activity by presence of a chemical that competes with thesubstrate for binding to the active site of the enzyme is called substrate analogue.
