List of practice Questions

Study the following and pick up the incorrect combinations:

S.No.	Group	Flourished in...	Example
I	Pisces	Devonian period	Exocoetus
II	Amphibia	Cretaceous period	Colotes
III	Reptilia	Mesozoic era	Hemidactylus
IV	Mammalia	Palaeozoic era	Felis

Assertion (A): Propionibacterium sharmanii is responsible for large holes in Swiss cheese.
Reason (R): Characteristic texture, flavour and taste of cheese is specific to microorganism.
Identify the correct option from the following:

Choose the correct statements among the following
I. Streptokinase is produced by Streptococcus.
II. Saccharomyces cerevisiae is used for commercial production of Ethanol.
III. Cyclosporin-A — blood cholesterol lowering agent produced by Trichoderma polysporum.
IV. Statin produced by yeast.

Taxonomic hierarchy includes the following obligate categories:
Class, Family, Kingdom, Order, Species, Phylum, Genus
Arrange them in correct sequence.

Assertion (A): Radial symmetry is an advantage to sessile or slow moving animals.
Reason (R): Radial symmetry allows equal distribution of sense organs and body parts in all directions, facilitating equal response in any direction.
Identify the correct option from the following:

Statement-I: In articular cartilages, perichondrium is present.
Statement-II: Intervertebral discs contain fibrous cartilage.
Identify the correct option from the following:

Choose the incorrect statements among the following
1. Purines and cytosine are common in DNA and RNA.
2. Thymine is present only in RNA.

3. Uracil is present in DNA at the place of Thymine.
4. Adenine and Guanine are Purines

Assertion (A): In prokaryotes the DNA in the nucleoid is organized in large loops held by proteins.
Reason (R): In prokaryotes, negatively charged DNA molecules are held with positively charged proteins.
Identify the correct option from the following:

Match the following

List - I	List - II
A. Ori	IV. Controlling the copy number of linked DNA
B. Selectable marker	III. Permitting the growth of transformants
C. Cloning site	II. Single recognition site to link alien DNA
D. Cloning vector	I. Low molecular weight

Choose the correct statements among the following
I. Pure DNA can be isolated by using ribonuclease and proteases.
II. Ethidium bromide staining facilitates the visualisation of DNA fragment in Agarose gel.
III. Sticky and ligation techniques help to cut the gene of interest from the source DNA.

Choose the correct statement among the following
I. Validity of GM research and safety of introducing GMO has to be given by GEAC.
II. Molecular farming means utilization of plants as biofactories for obtaining commercially useful products.
III. Basmati Rice variety is a transgenic plant with improved nutritional value.
IV. “Flavr savr” is suitable for food storage technology.

Match the following

List - I	List - II
A) Kinetin	IV) Adenine derivatives
B) ABA (Abscisic Acid)	I) Terpenes
C) GA3 (Gibberellic Acid)	I) Terpenes
D) IAA (Indole Acetic Acid)	III) Indole compound

Choose the correct series of bacteria that cause Tetanus, Diphtheria, Crown gall and Blight, respectively

Number of nucleotides in viroid

Choose the correct statements among the following:
I) CO\textsubscript{2} fixed by the forest will have direct economical value.
II) By reducing the use of pesticides we can protect the pollinators.
III) Ecosystem services are delivered by non-living organisms of ecosystem.
IV) Pollinators play a significant role in the enhancement of food production.
Identify the correct option from the following: