Agriculture - Online Test
Q1. Glycolysis occurs in
Answer : Option A
Explaination / Solution:
Glycolysis" means the splitting of glucose. The first step of the process occurs in the cytoplasm of the cell and yields a small amount of energy (measured in units of ATP) and two molecules of pyruvate.
The other steps occur in the mitochondria.
It is an ongoing process as your cells have a constant need for energy
Q2. The period from birth to death of an organism represents
Answer : Option D
Explaination / Solution:
The period from Birth of an individual to its natural death is called life span. Different organisms have different life span starting from one day to hundreds of years.
Q3. Which type of root is developed from parts of the plant other than radicle?
Answer : Option C
Explaination / Solution:
Roots developed from parts of the plant other than radicle are called adventitious roots.
Q4. A speciallised parenchymatous cells, which are closely associated with sieve tube elements is
Answer : Option D
Explaination / Solution:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls.
Q5. Auxins are generally produced in
Answer : Option D
Explaination / Solution:
Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). They are produced in the stem, buds, and root tips.
Example: Indole Acetic Acid (IA).
Auxin is a plant hormone produced in the stem tip that promotes cell elongation
Q6. Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
Answer : Option A
Explaination / Solution:
The porinsare proteins that form huge pores in the outer membranes of the plastids, mitochondria and some bacteria allowing molecules up to the size of small proteins to pass through.
Q7. The requirement of micro nutrient are always low if the concentration increases it leads to
Answer : Option D
Explaination / Solution:
The requirement of micronutrients is always in low amounts while their moderate decrease causes the deficiency symptoms and a moderate increase causes toxicity.
Q8. The half of the total carbon dioxide fixation on earth is carried out by algae through
Answer : Option C
Explaination / Solution:
Being photosynthetic, algae increase the level of dissolved oxygen in their immediate environment.
Q9. In Bacterial photosynthesis, hydrogen donar is
Answer : Option B
Explaination / Solution:
In green plants is the hydrogen donor and is oxidised to . Some organisms do not release during photosynthesis. When H2S, instead is the hydrogen donor for purple and green sulphur bacteria, the ‘oxidation’ product is sulphur or sulphate depending on the organism.
Q10. Outermost green leafy whorls of flower is called
Answer : Option B
Explaination / Solution:
The outermost whorl of flower is green leafy structure, called sepals. Sepals protect the flower in buds stage. It is generally attached with thalamus of the flower.
