- how many of the following is/are false statement/s w.r.t.
photorespiration?
(i) One aTP is consumed in this cycle.
(ii) It is almost nil in most heliophytes.
(iii) main organ is chloroplast, other organs peroxisome
and mitochondria are required for their completion.
(iv) high light intensity and high temperature promote it.
(v) Out of total carbon entering the cycle 75% will be
regenerated.
(a) 1 (b) 3
(c) 2 (d) None of these
- If half of the leaf of a potted plant is kept in a glass
bottle, through split cork, containing KOh. after keeping
this apparatus in light for one day leaf is taken out of
bottle and iodine test was performed. What can be
observed from this?
(a) Outer half turns blue black
(b) Inner half remain yellow
(c) Whole leaf turns blue black
(d) Both (a) and (b)
- Which of the following are true statements?
- Best light for photosynthesis is white, due to its
photosynthetic enhancement effect.
- Quanta required photosynthesis is 1/8.
- chlorophyll-b contain-chO group attached to its 3rd
carbon.
- Law of limiting factor enunciated by Blackman.
- In Z-scheme Fd found both in PS I and PS II.
(a) 1, 2, 3 and 4 (b) 1, 3, 4 and 5
(c) 2 and 4 (d) 1, 3 and 4
- radioisotopes used in photosynthetic research are
(a)^32 P and^35 S (b)^18 O and^14 c
(c)^15 N and^14 c (d)^14 N and^15 N
- In case of sweet potato for storage of food in root tuber,
it is translocated mainly through
(a) sieve cells as sucrose (b) sieve tubes as starch
(c) sieve cells as starch (d) sieve tubes as sucrose.
- Which of the following statements is true?
(a) Plasmamembrane is a permeable membrane.
(b) curtis called transpiration as a “necessary evil”.
(c) Kranz anatomy of c 4 leaf show large chloroplast in
mesophylls and smaller ones in bundle sheath.
(d) Vallisnaria plant has value of transpiration ratio
more than banyan tree.
157. Which of the following is false about c 4 pathway?
(a) The primary cO 2 acceptor is PEP.
(b) Bundle sheath cells contain PEPcase.
(c) Enzyme for final cO 2 fixation is ruBiscO.
(d) mesophyll cells lack ruBiscO.
158. To form one glucose molecule in c 3 cycle. how much
energy is used for its reduction part?
(a) 12 aTP and 12 NaDh
(b) 18 aTP and 12 NaDPh
(c) 18 aTP and 12 NaDh
(d) 12 aTP and 12 NaDPh
159. how many of the following statements are true?
(j) c 4 plants need 12 aTP more than c 3 plants for
formation of one glucose.
(k) Proteins enter aerobic respiration as organic acid
after deamination of their amino acids.
(l) Bolting in biennial plants ‘in situ’ commonly takes
after low temperature treatment, as in carrot.
(m) Last electron acceptor in ETc is oxygen.
(n) mass flow in sieve tube is an active process.
(a) 4 (b) 3 (c) 2 (d) 5
160. Plants are removed from asthma patient’s room during
night because
(a) they compete for O 2 in room with the patients
(b) they release cO 2 at night
(c) they produce cO 2 all the time but release O 2 only
during day
(d) they do not photosynthesise at night so that they
increase cO 2 concentration at night.
161. ratio between 2-carbon and 3-carbon intermediate
having Nh 2 group formed in ‘photosynthetic carbon
oxidation cycle’ is
(a) 2 : 1 (b) 1 : 1
(c) 3 : 2 (d) 3 : 4.
162. Which of the following is a false statement?
(a) cO 2 is a major limiting factor for photosynthesis.
(b) Plant attains light compensation point twice during
24 hours.
(c) Plant kept at compensation point remains normal
but do not grow.
(d) chloroplasts of bundle sheath lacks properly
developed grana, but, contain large starch grains.
163. Net gain of aTP in plants is 36 per glucose molecule
consumed. how many of these aTP are produced in
mitochondrion?
(a) 34 (b) 30 (c) 24 (d) 33
