- Which of the following statements about plasmolysis is/are
true?
I. Plasmolysis occurs when water moves into the cell.
II. Cells shrink in hypotonic solutions.
III. An isotonic solution balances the osmotic pressure of
the cytoplasm, thus preventing plasmolysis.
(a) I only (b) II only
(c) III only (d) I and II only. - The given table summarises the differences between
photosystem I and photosystem II.
Photosystem I Photosystem II
(i) The system is located in
the nonappressed part of
grana thylakoids as well
as stroma thylakoids.
Photosystem II is present in
the appressed part of grana
thylakoids.(ii) Chlorophyll to carote-
noid ratio is low.Chlorophyll to carotenoid
ratio is high.
(iii) It is connected with
photolysis of water.It is not connected with
photolytic oxidation of water.
(iv) Usually it hands over its
electron to NADP+.Usually it hands over its
electrons to PS I.Which of the given differences are incorrect?
(a) (ii) and (iv) (b) (i) and (ii)
(c) (ii) and (iii) (d) (ii), (iii) and (iv)
- The process that is opposite to denitrification is
(a) nitrification (b) nitrate reduction
(c) nitrogen fixation (d) ammonification. - Apoplastic path for the transport of water in root is through
(a) intercellular spaces
(b) intercellular spaces and cell walls
(c) cell walls only
(d) intercellular spaces, cell walls and endodermis. - Select the correct option to fill up the blanks in the following
statements.
(i) Mn and Cl present in PSII play an important role in
.
(ii) The process that makes important difference between
C 3 and C 4 plants is .
(iii) In photosynthesis, light independent reactions takes
place in .
(iv) Wavelength of PAR is .
(i) (ii) (iii) (iv)
(a) ATP Photorespiration Stromal 500-600 nm
synthesis matrix
(b) Photolysis Photorespiration Stromal 400-700 nm
of water matrix
(c) Photolysis Transpiration Thylakoid 450-950 nm
of water lumen
(d) ATP Transpiration Stromal 400-700 nm
synthesis matrix
11. Which of the following is correct pair of free living nitrogen
fixing bacteria?
(a) Anabaena and Azotobacter
(b) Azotobacter and Clostridium
(c) Rhizobium and Azotobacter
(d) None of these
12. Which of the relations is correct?
(a) ψs = ψp + ψw (b) ψp = ψm + ψw + ψs
(c) ψw = ψs + ψp (d) ψw = ψm – ψp + ψs
13. Premature fall of flower bud is due to deficiency of
(a) phosphorous (b) manganese
(c) copper (d) zinc.
14. Consider the following statement and select the correct
option stating which ones are true (T) and which ones are
false (F).
(i) PS II can operate only in conjunction with PS I.
(ii) Chloroplast stroma contains light independent reaction
enzymes.
(iii) Chloroplast do not have grana in bundle sheath cells
of C 4 plants.
(iv) Solarisation is formation of chlorophyll.
(v) Chemiosmotic hypothesis of ATP synthesis in chloroplast
is based on accumulation of Na+ ions.
(i) (ii) (iii) (iv) (v)
(a) T F T F T
(b) T T F T F
(c) T T T F F
(d) T F T F T
15. Study the given diagram of stomata.
Which of the following statements is correct regarding the
above diagram?
(a) Orientation of part A helps in the opening of stoma.
(b) B is thick and elastic in structure.
(c) Opening and closing of the C is caused by expansion
and contraction of B.
(d) All of these.- Read the given statements and select the correct option.
Statement A : C 4 plants are more efficient than the C 3
plants.
Statement B : C 4 plants are more efficient in accepting
CO 2 from atmosphere even when it is found in low
concentration.
(a) Both statements A and B are correct and statement B
is the correct explanation of statement A.