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Home » GAT Subject » Botany Mcqs » Aptitude Test - 20
1.Which of the following macronutrients is used in fertilizers?
A. N
B. O
C. P
D. N
2.Nitrogen is not taken up by plants in _______ form.?
A. N2
B. NO3�
C. NO2�
D. N2
3.Hydroponics was demonstrated by?
A. Julius Von Sachs
B. Hoagland
C. Arnon
D. Julius Von Sachs
4.Which of the following roles is not a criterion for essentiality of an element?
A. In its absence, plants do not set seeds
B. Irreplaceable by another element
C. Indirectly involved in the metabolism of the plant
D. In its absence, plants do not set seeds
5.Any mineral ion concentration that reduces that dry wt. of tissues by 10% is called as?
A. critical concentration
B. toxic concentration
C. beneficial concentration
D. critical concentration
6.Which of the following statements if wrong about manganese toxicity?
A. Appearance of brown spots surrounded by chlorotic veins
B. Deficiency of Iron
C. Deficiency of Calcium
D. Appearance of brown spots surrounded by chlorotic veins
7.Which of the following is not a function of soil?
A. It holds water
B. It supplies air to roots
C. It acts as a matrix that destabilizes the plant
D. It holds water
8.Minerals are transported through _________ along the _________ stream of water.?
A. xylem, descending
B. phloem, descending
C. xylem, ascending
D. xylem, descending
9.Which of the following elements do not get translocated to younger parts?
A. N
B. P
C. K
D. N
10.Where do plants obtain most of their carbon and oxygen?
A. From nitrates in the soil
B. From ammonia in the soil
C. From nitrogen in the atmosphere
D. From nitrates in the soil
11.Why can�t all minerals be passively absorbed through the roots?
A. They are present in the soil as charged particles
B. The concentration of minerals in the soil is very high
C. Minerals can never be transported
D. They are present in the soil as charged particles
12.How do most minerals enter the root?
A. Through guttation
B. Through transpiration
C. Through Active absorption
D. Through guttation
13.What are transport proteins?
A. They are restriction points
B. They are control points
C. They are not present in plants
D. They are restriction points
14.After active or passive absorption of all the mineral elements, how are minerals further transported?
A. Transported through guttation
B. Not transported at all
C. Through the transpiration stream
D. Transported through guttation
15.Which of the following is not a chief sink for the mineral elements?
A. Young leaves
B. Developing flower
C. Old leaves
D. Young leaves
16.Where does the unloading of mineral ions occur in the plants?
A. At the root endings
B. At the stem endings
C. At the root hair cells
D. At the root endings
17.Generally, from which of the following parts of the plants, the minerals are remobilised?
A. Senescent parts
B. Growing parts of the plant
C. Younger leaves
D. Senescent parts
18.Which of the following element is not remobilised?
A. Phosphorous
B. Sulphur
C. Nitrogen
D. Phosphorous
19.How do most of the nitrogen travels in the plants?
A. As ammonia
B. As nitrates
C. As inorganic ions
D. As ammonia
20.Which of the following carbohydrates acts as food for the plants?
A. Glucose
B. Sucrose
C. Mannose
D. Glucose
21.What is understood by the term sink in the plants?
A. The part that needs the food
B. The part that synthesises the food
C. The part that is going to die
D. The part that needs the food
22.What is the direction of food in the phloem?
A. Bi-directional
B. Unidirectional
C. Tri-directional
D. Bi-directional
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