Micronutrients

Q. Find the odd one out with respect to micronutrients in plants

1. Nickel
2. Calcium
3. Iron
4. Zinc

Q.

Sucrose enters a phloem sieve-tube cell because of

1. osmosis.

2. water potential

3. active transport

4. a process regulated by auxin.

Q.

The deficiencies of micronutrients not only affects the growth of the plants but also its vital functions, such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements will mostly affect, both photosynthetic and mitochondrial electron transport?

1. Cu, Mn and Fe

2. Mn, Co and Ca

3. Co, Ni and Mo

4. Ca, K and Na

Q.

Micronutrient which is important in transport of sugar, synthesis of enzymes and cell division is

1. Phosphorus

2. Boron

3. Potassium

4. Sulphur

Q.

What pigment is used in human vision?

1. beta-carotene

2. retinal

3. vitamin A

4. chlorophyll a

Q.

What is the name of the process whereby sugar enters sieve tubes by means of active transport?

1. bulk flow

2. cohesion

3. phloem-loading

4. guttation

Q. Elements that are required in amounts less than 10 mmole per kg of dry matter are termed as

1. macronutrients
2. micronutrients
3. trace elements
4. both b & c

Q. Which of the following is a micronutrient?

1. Fats
2. Carbohydrates
3. Vitamins
4. Proteins

Q.

Which of the following elements is not required by plants for their normal healthy growth?

1. Calcium

2. Magnesium

3. Lead

4. Iron