CPH 201 (1+1) Crop Physiology Question Paper for Agriculture

UNIVERSITY OF AGRICULTURAL SCIENCES, DHARWAD

College of Agriculture, RAICHUR

Crop Physiology (CPH – 201 (1+1))

EXTERNAL EXAMINATION

Max. Marks: 50.00
Duration: 2:30 hours
Total: 20 × 0.5 = 10.0

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Q.I Objective type of questions

A) Tick the correct answer for the following

(10 × 0.5 = 5.0)

1. In unisexual plants sex can be changed by the application of
   a) Auxins
   b) ABA
   c) Ethanol
   d) Cytokinins

2. Photomorphogenic pigment in plant is
   a) Phytochrome
   b) Chlorophyll
   c) Carotene
   d) Xanthophyll

3. The seed dormancy is induced by
   a) IAA
   b) GA
   c) ABA
   d) Zeatin

4. A characteristic feature of ripening of some fruits like banana is a sudden increase in respiration which is known as
   a) Anthesis
   b) Photorespiration
   c) Climacteric
   d) Climatic

5. Plant growing in saline soils are called
   a) Mesophytes
   b) Hydrophytes
   c) Halophytes
   d) Xerophytes

6. Ultimate cause of water movement against gravity is
   a) Osmosis
   b) Imbibition
   c) Photosynthesis
   d) Transpiration

7. Translocation of sugars in flowering plants occurs in the form of
   a) Glucose
   b) Starch
   c) Sucrose
   d) Maltose

8. Guard cells differ from epidermal cells in having
   a) Mitochondria
   b) Vacuole
   c) Cell wall
   d) Chloroplasts

9. Element essential for water splitting in photosynthesis
   a) Mn, Zn
   b) Mg, Cl
   c) Mn, Cl
   d) Mg, Zn

10. Which is considered as the first and final product of photosynthesis?
    a) RUBP
    b) PGAL
    c) PGA
    d) Sugar

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B) Fill up the blanks with suitable answers

(5 × 0.5 = 2.5)

1. The ‘S’ shaped growth curve is not observed in the crop like ______

2. Soil less culture of plants is called ______

3. Intensity of light at which rate of photosynthesis equals rate of respiration is called ______ point

4. Motivating force for guttation is ______

5. ______ is a naturally occurring cytokinin

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C) Match the following

(5 × 0.5 = 2.5)

A	B
1. Parthenocarpy	c) Seedless fruit
2. Osmotic quantities	d) OP, TP and DPD
3. Vernalization	e) Ripening of fruits
4. Flowering hormone	a) Florigen
5. Senescence	b) Last phase of growth

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Q.II

A) Define the following terms (Any five)

(5 × 1 = 5.0)

1. Water potential

2. Hormone

3. Vernalization

4. Water use efficiency

5. Photophosphorylation

6. Anti-transpirants

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B) Give reasons for the following (Any five)

(5 × 1 = 5.0)

1. Nitrogen deficiency occurs in older leaves

2. Photorespiration occurs in C₃ plants

3. Water is a universal solvent

4. Zinc deficiency causes little leaf condition

5. Transpiration is a diffusive process

6. Water potential of plant and soils are negative

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C) Differentiate between (Any five)

(5 × 1 = 5.0)

1. Determinate and indeterminate growth

2. Pressure potential and solute potential

3. Apoplastic and symplastic transport

4. Chlorosis and Necrosis

5. Senescence and abscission

6. Climacteric and non-climacteric fruits

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Q.III Answer the following in brief (Any five)

(5 × 2 = 10.0)

1. Define seed dormancy and explain the methods to break seed dormancy

2. Write the agriculture uses of Auxins and gibberellins

3. Write the biochemical changes during fruit ripening

4. Draw the neat diagram of CAM cycle

5. Explain the growth curve

6. Plant adaptations to drought

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Q.IV Answer the following in detail (Any Five)

(5 × 3 = 15.0)

1. Define photoperiodism and write the classification of plants based on photoperiod with examples

2. Explain the stomatal movement

3. Give Mengel classification of nutrients

4. Draw the neat diagram of Krebs cycle and indicate energy balance

5. Explain the light reaction of photosynthesis

6. Explain any four growth parameters

7. Briefly explain the physiological disorders in crop plants

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