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WorksheetsMineral nutrition.
Total questions: 17
Worksheet time: 13mins
Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?
Leghaemoglobin scavenges oxygen and it is pinkish in colour.
Nodules act as sites for nitrogen fixation.
The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3 .
Nitrogenase is insensitive to oxygen.
Study the cycle shown below and select the option which gives the correct word for all the four blanks A, B, C and D
A: Nitrification, B: Ammonification, C: Animals, D: Plants
A: Denitrification, B: Ammonification, C: Plants, D: Animals
A: Nitrification, B: Denitrification, C: Animals, D: Plants
A: Denitrification, B: Nitrification, C: Plants, D: Animals
Which one of the following is not a micronutrient?
Molybdenum
Magnesium
Zinc
Boron
The common nitrogen-fixer in paddy fields is
Rhizobium
Azospirillum
Oscillatoria
Frankia
The function of leghaemoglobin in the root nodules of legumes is
Oxygen removal
Nodule differentiation
Expression of nif gene
Inhibition of nitrogenase activity
For its action, nitrogenase requires
Light
Mn2+
Super oxygen radicals
High input of energy
Deficiency symptoms of nitrogen and potassium are visible first in
Senescent leaves
Young leaves
Roots
Buds
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:
Xanthophyll
Carotene
Cytochrome
Laghaemoglobin
Which is essential for the growth of root tip?
Fe
Ca
Mn
Zn
Plants response to light..
Gravitropism
Chemotropism
Hydrotropism
Phototropism
How does water find it's way through the soil to the roots
Hoses
Pore Spaces
Rocks
Sand
Plants response to water..
Hydroptropism
Chemotropism
Phototropism
Gravitropism
Analyzing a bag of fertilizer..what does 10-10-10 stand for?
10% of Nitrogen, 10% Potassium, 10% Phosphorus
10% Nitrogen, 10% Phosphate, 10% Potash
10% Potash, 10% Phosphorus, 10% Potassium
10% Nitrogen, 10% Phosphorus, 10% Potassium
Which of the following are true about the stomata in plants? (Tick all that apply)
Oxygen leaves the plant via the stomata.
Carbon dioxide diffuses into the plant via the stomata.
Plants close their stomata during extremely hot days.
Plants leave their stomata open to the fullest during extremely hot days.
Why does a plant need nitrates from the soil? Choose the best answer.
To make glucose
To make amino acids
For growth
Because it is a mineral
Why might photosynthesis slow down or stop at high temperatures? Choose 2 answers.
Enzymes denature
Chlorophyll denatures
The plant wilts
Stomata close so no CO2 can enter the leaf
What does a plant need in order to photosynthesise? Choose 3 answers.
Carbon Dioxide
Nutrients
Light
Water
Glucose
