The slides shown in this PPT are very important for all the aspirants preparing for LIfe Sciences Exams like CSIR-NET, DBT-JRF, GATE, ICMR etc..
The points and MCQs depicted in this video are previously appeared in the above said exams.
This Presentation are very helpful for Lecturers to Teach and Students to Learn.
2. 1.) The Plant hormones, Gibberellic Acid is generally not
associated with:
a) Stem elongation
b) Parthenocarpy
c) Parthenogenesis
d) Malt production
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3. Answer is:
c) Parthenogenesis
Explanation: Gibberelic acid is generally meant for the Plant
growth. So it is associated with Stem elongation.
Parthenocarpy is associated with the development of Seedless
fruits.
Parthenogenesis is related to Animals.
Hence the answer is Parthenogenesis.
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5. Answer:
A band of Waterproof corky tissue that is found on the side
and wall of Endodermis of roots.
This strip prevents Water from entering the Pericycle except
through the cytoplasm of Endoderm cells, this may be
important in producing Root Pressure.
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6. 3.) Which one of the following statements is true about Xylem in
Plants?
a) It is characterised by the presence of Tracheary elements
responsible for the conduction of H2O in vascular Plants.
b) It is responsible for the transport of H2O and characterized
by Sieve elements like Parenchyma cells and Scleroids.
c) It is responsible for the transport of assimilates in both
Vascular and characterized by tracheary elements.
d) It is responsible for the transport of assimilates in both
vascular and non-vascular plants.
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7. Answer is:
a.) It is characterised by the presence tracheary elements
responsible for the conduction of H2O in Vascular Plants.
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8. Xylem Phloem
Found deeper in the Stem tissues Usually found in outer edges of the stem.
Transports Water/Sap and minerals Transports sugars, amino acids, and other
foods.
Moves substances up the stem using passive
energy that requires no energy
Moves substances up and down the stem via
active transport which requires energy.
Contains Xylem Parenchyma cells and
tracheal cells
Contains Sieve tube cells, Companion cells
and Phloem Parenchyma cells.
Cells are star-shaped Cells are non-star shaped.
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18. Ans.) Primordial cells are the precursors of Gametes.
– These cells arise outside the Gonads.
– These are highly specialised cells.
– They develop as a Haploid Sperm and Eggs that generate a
new organism upon fertilisation.
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20. Ans.) These are group of proteins (TrxG) are a heterogenous
collections of proteins whose main action is to maintain gene
expression:
DNA binding TrxG
proteins
Chromatin-Remodelling
TrxG proteins
Histone –Modifiying
proteins
3 Types:
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24. Ans.) It binds to Xist during X-Chromosome inactivation. The
name Tsix comes from the reverse of Xist which stands X-
inactive specific transcript.
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30. Ans.) It is an enzyme that acts as Intracellular Antioxidant.
In short words it is SOD.
It also works as a Catalase enzyme that converts:
H2O2 H2 +O2
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31. One Cytokine with many Biological effects. This is called as
_______?
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