Questions
How many of the given structures are associated with the thylakoid membrane?
PS II, RuBisCO, LHC, PEPcase, $F _0$ of ATP synthase, cytochromes b & f.
- $2$
- $3$
- $4$
- $5$
Read the following statements.
i) Chloroplasts get aligned with their flat surface parallel to the cell walls to receive optimum light intensity.
ii) Water is the only electron donor in all photosynthetic organisms.
iii) ATP and NADPH are utilised in Carboxylation stage of Calvin cycle.
iv) Bundle sheath cells are characterized by having a large number of chloroplasts and impervious walls.
v) Law of limiting factors was proposed by Blackmann.
Which of the given statements are CORRECT?
- (i), (iii) and (iv)
- (i), (ii) and (iii)
- (iii), (iv) and (v)
- (v) only
Which cellular part is correctly described
- Thylakoids - Flattened membranous sacs forming grana
- Centrioles - Sites for active RNA synthesis
- Ribosomes - Those in chloroplasts are larger (80 S) while those in cytoplasm are smaller (70 S)
- Lysosomes - Opimally active at 8.5 pH.
The spaces inside the folds of ER membrane are known as
- Thylakoids
- Cisternae
- Mesosomes
- Periplasmic space
Match the following
| a. | Bacteria | 1. | Synthesis and storage of lipids |
|---|---|---|---|
| b. | Sphaerosomes | 2. | Idiogram |
| c. | Chloroplasts | 3. | Glycocalyx |
| d. | Karyotype | 4. | Thylakoids |
- a-3, b-1, c-4, d-2
- a-3, b-1, c-2, d-4
- a-4, b-3, c-2, d-1
- a-1, b-2, c-3, d-4
- a-3, b-2, c-4, d-1.
Consider the following processes.
a. $O _2$ evolution
b. $CO _2$ fixation
c. NADPH formation
d. Chlorophyll biosynthesis.
Which of these do not occur in thylakoids?
- $1$ and $2$
- $2$ and $3$
- $3$ and $4$
- $2$ and $4$
If $^{14}CO _2$ is added to a suspension of photosynthesizing chloroplasts, which of the following will be the first compound to be radioactive?
- ATP
- NADPH
- NADH
- $3$-phosphor glycerate
Which one of the following options is true in photsynthesis.
- $CO _2$ is oxidized and $ H _2O $ is reduced
- $H _2O $is oxidized and $CO _2 is reduce d$
- Both $CO _2$ and $H _2O$ are reducedd
- Both $CO2$ and$ H2O$ are oxidized
With reference to photosynthesis in chloroplasts, consider the following statements.
a. The reactions that break down water and produce oxygen are located on the lumen side of the thylakoid membrane, in granum areas.
b. The molecules of ferredoxin-NADP re-educate that generate NADPH are located on the side of the membrane facing stroma.
Which of the statements given is/are correct?
- $1$ only
- $2$ only
- Both $1$ and $2$
- Neither $1$ nor $2$
Which of the following pairs are correctly matched? Principal wavelength Physiological of light event.
a. $700$nm- Photo system I
b. $650$nm- Photo system II
c. $690$nm- Photo system III
d. $620$nm- Phycocyanin
Select the correct answer using the codes given.
- $1, 2$ and $4$
- $1, 3$ and $4$
- $2$ and $4$
- $1$ and $3$
When one molecule of $NADP^{+}$ is reduced how many water molecule split in to $H^{+}$ and $[O]$?
- Two
- Three
- One
- Four
When only light of wavelength beyond $680\ mm$ are available then which of the following is not occur?
- Absorption of light
- Formation of ATP
- Release of $O _{2}$
- Excitetion of electron
Match column I with column II and select the correct option from the given codes
| Sr. no | Column I | Sr.no | Column II |
|---|---|---|---|
| A. | $C _4$ plant | i. | Succulents |
| B. | Chlorophyll $b$ | ii. | Accessory photosynthetic pigment |
| C. | PS II | iii. | Photooxodation of $H _2O$ |
| D. | CAM | iv. | Kranz anatomy |
.
- A - (iv), B - (ii), C - (iii), D - (i)
- A - (iii), B - (ii), C - (iv), D - (i)
- A - (i), B - (iii), C - (ii), D - (iv)
- A - (i), B - (ii), C - (iii), D - (iv)
Following table summarises the differences between light reaction and dark reaction.
| Light reaction | Dark reaction | |
|---|---|---|
| i | These arealso called as biosynthetic phase | These are also calledas photochemicalphase |
| ii | These reactionoccur over thylakoids. | These reaction occur in stroma of chloroplasts. |
| iii | These produce assimilatory power i.e.$NADPH _{2}$and ATP | These consume $NADPH _{2}$ and ATP. |
| iv | These are directiondependent uponlight. | These depend upon the products synthesisedduring light reaction |
Which of the above pairs of difference is/are incorrect?
- (i) and (iv)
- (iii) and (iv)
- (ii) only
- (i) only
Why does the total amount of $CO _2$ in the atmosphere remains constant even though respiration liberates $CO _2$?
- $CO _2$ acts as a buffer
- $CO _2$ is converted to carbohydrates in photosynthesis
- $CO _2$ forms carbonic acid
- $CO _2$ undergoes cleavage during photosynthesis.
Thylakoids are found in
- bacteria
- blue green algae
- higher plants
- all of these
In a plant cell chlorophyll is present in:
- Caraplasts
- Stroma
- Leucoplast
- Chloroplast
Minerals controlling synthesis of chlorophyll molecule ______________.
- $Ca$ and $K$
- $Fe$ and $Mg$
- $Mn$ and $K$
- $Ca$ and $Mg$
Ginger-Muller counter is used for ________________.
- Estimating chlorophyll concentration
- Measuring radioactivity
- Identifying phytochrome pigments
- Measuring the light absorption by chlorophyll