Tag: significance of transpiration

Questions Related to significance of transpiration

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

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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

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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.

The leaf which produces spores is called

botany the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Sorus

  2. Sporangium

  3. Sporangiophore

  4. Sporophyll

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Correct Option: A

Palisade cells and spongy cells are found in:

botany the leaf mechanism of absorption mineral absorption significance of transpiration

  1. Dicot steam

  2. Monocot leaf :

  3. Monocot root

  4. Dicot lef

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Correct Option: B

Match the following and choose the correct option.

A. Leaves i. Anti-transpirant
B. Seed ii. Transpiration
C. Roots iii. Negative osmotic potential
D. Aspirin iv. Imbibition
E. Plasmolyzed cell v. Absorbtion
botany the leaf mechanism of absorption mineral absorption significance of transpiration

  1. A-iii, B-iv, C-I, D-ii

  2. A-i, B-ii, C-iii, D-iv

  3. A-iii, B-ii, C-iv, D-i

  4. A-iii, B-ii, C-i, D-iv

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Correct Option: A