Tag: mineral absorption

Questions Related to mineral absorption

Oxygen we breathe is obtained from ________

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Respiration

  2. Guttation

  3. Photosynthesis

  4. All of the above

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Correct Option: C
Explanation:

$CO _{2} + H _{2}O \underset {chlorophyll}{\xrightarrow {light}} sugar + oxygen (O _{2})$
Oxygen is a product of photosynthesis.

Carbohydrates, the most abundant biomolecules on earth are produced by

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Some bacteria, algae and green plants

  2. Fungi, algae and green plants

  3. All bacteria, fungi and algae

  4. Viruses, fungi and bacteria

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Correct Option: A
Explanation:

Carbohydrate synthesis occurs through photosynthesis Chloroplasts are the green plastids which occur in all the green parts of the plants. They are the actual site of photosynthesis. 

Cyanobacteria and other photosynthetic bacteria do not possess chloroplasts. However, the photosynthetic pigments of these organisms are located on thylakoids which lie freely in the cytoplasm.
The algae also contain the chloroplasts to perform the photosynthesis.
Fungi are either saprophytic, symbiotic or parasitic organisms. Viruses are parasitic.
Hence, the correct answer is 'Some bacteria, algae and green plants'.

Photosynthesis is essential for survival of

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Animals

  2. Plants

  3. Most of the organisms

  4. All of the above

Show answer
Correct Option: D
Explanation:
Photosynthesis is plants taking in water, carbon dioxide, and light to make sugar and oxygen. This is important because all living things need oxygen to survive. All producers make oxygen and sugar for the secondary consumers and then the carnivores eat animals that eat the plants. If there is not enough producers to make the sugar and oxygen that all living things need then all living things will die out. Without producers CO2 couldn't be taken in by the plants to be turned back into oxygen that all animals need for survival. Also, without producers, herbivores wouldn't have anything to eat and they would all die leaving carnivores without food to eat and all life forms wouldn't be on Earth. Photosynthesis happens in the Chloroplast of the plant's organelle, if the Chloroplast wasn't in the plant Photosynthesis couldn't happen. If there was no sunlight for the plant to absorb then Photosynthesis couldn't happen. If living things didn't breathe out CO2 then the plants would die and living things would have no way of getting oxygen. These are the reasons why Photosynthesis is important to plants and all loving things on the planet.

So, the correct option is 'Option D'.

In cereals, which one of the following kinds of leaves plays a key role in the supply of photosynthates to the developing grain?

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Young leaves

  2. Mature leaves

  3. Flag leaves

  4. Scale leaves

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Correct Option: A

Match List I with List II and select the correct answer using the codes given the lists.

List I List II
a. Dictyosomes $1$. Storage
b. Mitochondria $2$. Photosynthesis
c. Vacuoles $3$. Transport
d. Grana $4$. Secretion
$5$. Respiration
biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. A-$4$, B-$5$, C-$1$, D-$2$

  2. A-$3$, B-$4$, C-$2$, D-$1$

  3. A-$4$, B-$5$, C-$3$, D-$2$

  4. A-$4$, B-$3$, C-$1$, D-$3$

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Correct Option: A

Photosynthetic pathway for liberation of one molecule of ${ O } { 2 }$ requires 8 quanta. Then how many NADPH are formed during this process __________________.

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. $\displaystyle One$

  2. $\displaystyle Two$

  3. $\displaystyle Three$

  4. $\displaystyle Four$

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Correct Option: A

Photosynthesis in CAM-plants in minimal because of the limited amount of _________________.

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. $CO _{2}$ fixed at night

  2. $O _{2}$ fixed at night

  3. $O _{2}$ fixed at day light

  4. $CO _{2}$ fixed at day light

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Correct Option: A

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Increasing atmospheric $CO _{2}$ concentration up to $0.05$% can enhance $CO _{2}$ fixation rate

  2. $C _{3}$ plants respond to higher temperatures with enhanced photosynthesis while $C _{4}$ plants have much lower temperature optimum

  3. Tomato is a greenhouse crop which can be grown in $CO _{2}$ - enriched atmosphere for higher yield

  4. None of above

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Correct Option: A

If a $C _4$ plants needs to fix $5CO _2$ then how many ATP molecules does it use in its bundle sheath cells to do so?

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. 20

  2. 15

  3. 25

  4. 18

Show answer
Correct Option: B
Explanation:
To fix 6 Co2 in bundle sheath cells C4 plants require 18 ATP
So,for 1CO2 3 ATP are required
if 5CO2 are fixed 5 x 3 =15 ATP are required.
So, the correct option is '15'.

What would happen if green plants disappear from earth?

biology the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Only herbivores die

  2. Only carnivores die

  3. No one dies

  4. Both herbivores and carnivores die

Show answer
Correct Option: D
Explanation:

Green plants are the sources of food and energy for all organisms. If all green plants disappear from the earth, all the herbivores will die due to the absence of food and so will the carnivores.

So, the correct answer is option D.