71. Consider the following statements and choose the correct answer:
1. Preparations of tRNA from plant sources contain cytokinins
2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis
3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems
1. Preparations of tRNA from plant sources contain cytokinins
2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis
3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems
72. The most important method of conservation of pollutants is
73. According to Hansel, which of the following ranges of temperature is equally efficient in shortening the number of days to flowering in Petkus winter rye?
74. The organisms which secrete digestive enzymes to break down food into smaller substances and then absorb the digested food are known as
75. Which of the following non-succulent perennials shed their leaves soon after the rainy season is over?
76. Match List-I with List-II and select the correct answer:
List-I (parts of ovule)
List-II (Structure and Location)
a. Hilum
1. Place of origin of integument or basal swollen part of the nucellus
b. Raphe
2. Narrow pore passage formed by the projection of the integuments through which the pollen tube enters into the ovule
c. Micropyle
3. The point the attachment of the body of the ovule with the funiculus
d. Chalaza
4. The longitudinal ridge formed by lengthwise fusion of funiculus with the body of ovule in a typical anatropous ovule
| List-I (parts of ovule) | List-II (Structure and Location) |
| a. Hilum | 1. Place of origin of integument or basal swollen part of the nucellus |
| b. Raphe | 2. Narrow pore passage formed by the projection of the integuments through which the pollen tube enters into the ovule |
| c. Micropyle | 3. The point the attachment of the body of the ovule with the funiculus |
| d. Chalaza | 4. The longitudinal ridge formed by lengthwise fusion of funiculus with the body of ovule in a typical anatropous ovule |
77. Before the abscission of a plant organ, a layer of tissue is usually formed at the base of the organ; this layer of tissue is referred to as
78. Consider the following statements regarding the general symptoms of diseases and choose the correct answer:
1. The charges in the host which serve to recognise the disease are called the signs and symptoms of the disease
2. The sign of a disease is the external appearance of some portion of the pathogen of the host
3. The symptoms are the visible effects which the host plant induces on the parasites
4. Any visible deviation on the host plant from the normal structure and function is called a symptom
1. The charges in the host which serve to recognise the disease are called the signs and symptoms of the disease
2. The sign of a disease is the external appearance of some portion of the pathogen of the host
3. The symptoms are the visible effects which the host plant induces on the parasites
4. Any visible deviation on the host plant from the normal structure and function is called a symptom
79. The devernalization of the vernalized grains of Petkus winter rye may be accomplished by
80. Consider the following statements regarding the crassulacean acid metabolism (CAM) plants and choose the correct answer:
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing
Read More Section(Plant Anatomy and Physiology)
Each Section contains maximum 100 MCQs question on Plant Anatomy and Physiology. To get more questions visit other sections.
- Plant Anatomy and Physiology - Section 1
- Plant Anatomy and Physiology - Section 2
- Plant Anatomy and Physiology - Section 3
- Plant Anatomy and Physiology - Section 4
- Plant Anatomy and Physiology - Section 5
- Plant Anatomy and Physiology - Section 6
- Plant Anatomy and Physiology - Section 7
- Plant Anatomy and Physiology - Section 9
- Plant Anatomy and Physiology - Section 10