CPH–201 (2+1) Crop Physiology Question Paper for Agriculture

UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR

College of Agriculture, Raichur

Course No: CPH–201 (2+1)
Course Title: Crop Physiology
Semester: II Semester (2010–11)
Marks: 50
Time: 2:30 hrs

---

Q.I (A) Underline the correct answer

(10 × 0.5 = 5.0)

1. The ratio of leaf area to ground area is called as
   a) LAI
   b) NAR
   c) RGR
   d) CGR

2. Grand growth occurs which phase of growth curve
   a) Lag phase
   b) Log phase
   c) Steady phase
   d) Declining phase

3. Most important element that is involved in solute potential of plant cells is
   a) Potassium
   b) Chlorine
   c) Nitrogen
   d) Magnesium

4. An example of micro element
   a) Nitrogen
   b) Potassium
   c) Phosphorus
   d) Zinc

5. Stomatal transpiration accounts to about
   a) 80–90%
   b) 30%
   c) 10%
   d) 0.1%

6. Photorespiration involves
   a) Mitochondria
   b) Chloroplast
   c) Peroxysomes
   d) All these

7. Sorghum is which type of plant
   a) C₃
   b) C₄
   c) CAM
   d) None of the above

8. Hormone which promote cell division in plants
   a) Cytokinins
   b) Auxins
   c) ABA
   d) Ethylene

9. Water molecules are held together by
   a) Covalent bond
   b) Hydrogen bond
   c) Ionic bond
   d) Van der Waals attractive forces

10. An example of anti-transpirant hormone
    a) ABA
    b) Ethylene
    c) NAA
    d) IAA

---

Q.I (B) Fill in the blanks with appropriate words

(5 × 0.5 = 2.5)

1. The water potential of pure water is ______

2. Hormone that is involved in ripening process is ______

3. In cotton, leaf turns into red color is termed as ______

4. The first stable product formed in C₃ plant is ______

5. Characteristic feature of magnesium deficiency is ______ chlorosis

---

Q.I (C) Match the following

(5 × 0.5 = 2.5)

A	B
1. Determinate organ	White bud in maize
2. Zinc deficiency	Floregin
3. F.W. Went	Leaf
4. Flowering hormone	C₃ plant
5. Rice	Auxin

---

Q.II Answer the following in one or two sentences only

(15 × 1.0 = 15.0)

A. Define the following (any five)

(5 × 1.0 = 5.0)

1. Drought

2. Photolysis

3. Osmosis

4. Photoperiodism

5. Phytohormones

6. HI

---

B. State TRUE or FALSE and correct the FALSE statement (any five)

(5 × 1.0 = 5.0)

1. Short day plants are also known as long night plants

2. C₃ plants are efficient over C₄ plants

3. Sulphur is macro element

4. Respiration is anabolic process

5. Non-cyclic photophosphorylation is incomplete type of photophosphorylation

6. In monocot plants guard cells are kidney shaped

---

C. Differentiate the following (any five)

(5 × 1.0 = 5.0)

1. Guard cell in light and guard cell in dark

2. C₃ and C₄ plants

3. Macro and micro nutrient

4. Growth and development

5. Aerobic and anaerobic respiration

6. Cyclic and non-cyclic electron transfer

---

Q.III Briefly answer the following questions (any five)

(5 × 2 = 10.0)

1. Define PGRs and explain their chemical classification

2. Write a short note on Mengel’s classification of plant nutrients

3. Briefly explain the effect of various factors on rate of aerobic respiration

4. Hydroponics prevents the accumulation of toxic organic decomposition products. Justify the statement

5. Define stress and enlist physiological parameters for drought resistance

6. Define water potential and state the physiological importance of water to plants

---

Q.IV Explain the following questions in detail (any five)

(5 × 3 = 15.0)

1. Write in brief regarding scope and importance of Crop Physiology in Agriculture

2. Define photosynthesis and describe the structure of chloroplast

3. Describe in detail the biochemical reactions of Kreb’s cycle

4. Describe the process of translocation of organic substances in higher plants

5. Enlist various growth parameters and describe growth functions in growth analysis

6. State the factors responsible for seed dormancy and explain the methods for breaking the seed dormancy

7. What do you mean by photoperiodism? Classify the plants according to photoperiod and give brief account of each

---