Biology - Online Test
Q1. Which compound consists of 5 carbon atoms?
Answer : Option B
Explaination / Solution:
Alpha-ketoglutaric acid is an important biological compound and is a key intermediate in the Krebs cycle. Alpha-ketoglutaric acid occurs naturally within cells.
One of its functions is to combine with ammonia to form glutamic acid and then glutamine. Another function is to combine with nitrogen released in the cell, therefore preventing nitrogen overload.
Q2.
There are two types of ozone
i. Good ozone and bad ozone.
ii. Good ozone is present in stratosphere while bad ozone is present in troposphere.
Answer : Option A
Explaination / Solution:
There are two types of ozone, bad ozone and good ozone.
Bad ozone is present in troposphere, it is bad because it is a type of pollution. Ozone and other compounds in car exhaust form smog.
Good ozone is present in stratosphere, it is good because it protect us from harmful UV radiations from the Sun.
Q3. The fruit develop form a whole inflorescence is called
Answer : Option C
Explaination / Solution:
True frui is the fruit that develops from ovary only. In composite fruits, whole inflorescence develops into fruits as in case of jackfruit.
Q4. The nuclear structures disappear during
Answer : Option C
Explaination / Solution:
The nuclear envelope and the nucleolus disappear and the spindle fibres start forming at the opposite poles of the cell. Metaphase is marked by the alignment of chromosomes at the equatorial plate.
Q5. The separation and purification of recombinant protein product is called as
Answer : Option A
Explaination / Solution:
Downstream processing is the separation and purification of recombinant protein product. Downstream processing and quality control testing vary for different products.
Q6. The hormone with enzymatic action which catalyses conversion of angiotensinogen into angiotensin is :
Answer : Option B
Explaination / Solution:
A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin which converts angiotensinogen in blood to angiotensin I and further to angiotensin II.
Q7. The theory of use and disuse was given by
Answer : Option D
Explaination / Solution:
The theory of use and disuse was given by Lamarck. In his theory of organic evolution he stressed that those traits or organs are used more evolve faster and those are not used degenerate in course of time.
Q8. The vascular bundles are closed when they
Answer : Option B
Explaination / Solution:
In the monocotyledons, the vascular bundles have no cambium present in them. Hence, since they do not form secondary tissues they are referred to as closed.2
Q9. Natural cytokinins are synthesized in
Answer : Option A
Explaination / Solution:
Natural cytokinins are synthesised in regions where rapid cell division occurs, for example, root apices.
Q10. A living organism can be unexceptionally differentiated from nonliving structure on the basis of
Answer : Option A
Explaination / Solution:
A living organism can be differentiated from non-living structures on the basis of reproduction. All the living organism reproduce unexceptionally for continuation of species.
