Biology - Online Test
Q1. What do the following figure represent in (i),(ii) and (iii) ?
Answer : Option D
Explaination / Solution:
Figure represents muscle fibres marked
i. as M-line,
ii as actomyosin myofilaments and
iii. Represents Z-line.
Q2. AIDS can be detected by
Answer : Option B
Explaination / Solution:
A series of blood screenings are performed to test for HIV. The enzyme-linked immunosorbent assay (ELISA), also known as an enzyme immunoassay (EIA), is the first test that your healthcare provider will order to screen for HIV. ELISA, like the Western blot test, detects HIV antibodies in your blood.
Q3. Name the fluid from which foetal cells are obtained for chromosomal analysis.
Answer : Option A
Explaination / Solution:
Amniotic fluid is used to obtain foetal cells for chromosomal analysis. This method is misuse as it can determine the sex of foetus. The fluid is collected form the surrounding of growing foetus.
Q4. The molecules which move from higher to lower regions are called as
Answer : Option C
Explaination / Solution:
In diffusion, molecules move in a random fashion, the net result being substances moving from regions of higher concentration to regions of lower concentration.
Q5. The most abundant type of animal tissue in the complex animals is
Answer : Option B
Explaination / Solution:
The most abundant type of animal tissue connective tissue as it forms variety of tissues such as blood, bone, cartilage, adipose, lymph, tendon and ligament. These connective tissue types perform wide range of functions in the animal body such as giving support, packing, repairing, storing of fat, connecting different organs, etc.
Q6. All prokaryotic, unicellular organisms are included under kingdom
Answer : Option D
Explaination / Solution:
All prokaryotic, unicellular organisms are included in the kingdom Monera. The Eukaryotic unicellular organisms are placed in Protista kingdom.
Q7. Exponential growth pattern in a population results into
Answer : Option D
Explaination / Solution:
Exponential growth pattern in population results into j-shaped curve. During exponential growth faster growth occurs and j-shaped curve is formed when time v/s growth is drawn.
Q8. Those essential element which occur in 1-10 mg/g of dry matter are
Answer : Option A
Explaination / Solution:
The nutrient required in larger quantity is called macronutrients. Those essential elements which occur in 1-10mg/g quantity is called macronutrients.
Q9. Which layer of alimentary canal is formed of loose connective tissues?
Answer : Option D
Explaination / Solution:
The submucosa consists of a dense and irregular layer of loose connective tissue with blood vessels, lymphatics, and nerves branching into the mucosa and muscular layer. It contains the submucous plexus, and enteric nervous plexus, situated on the inner surface of the muscular layer.
Q10. Where memory cells are formed?
Answer : Option D
Explaination / Solution:
Memory cells are formed in lymphocytes of WBC. Immunization against the particular disease based on the function of memory cell induced due to mild, heat killed pathogen administrated during immunization.
