Tag: water absorption and ascent of sap in plants

Questions Related to water absorption and ascent of sap in plants

Which of the following shows that metabolic energy is required in the absorption of ions

botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

  1. More ions absorption in presence of oxygen

  2. Less absorption of ions in presence of oxygen

  3. More ions absorption in presence of ATP

  4. More ions absorption in presence of NAD

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Correct Option: C
Explanation:

The absorption of ions, involving use of metabolic energy is called active absorption. Energy is generally obtained from ATP.Therefore active absorption is linked to hydrolysis of ATP

Difference between active and passive modes of membrane transport is

botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

  1. Active transport is confined to cations while passive is connected to anions

  2. Active transport is non-selective while passive one is selective

  3. Active transport requires metabolic energy while passive transport requires concentration gradients

  4. Active transport is more rapid.

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Correct Option: A

Active transport of solutes in a living system is?

botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

  1. Unidirectional

  2. Bidirectional

  3. Multidirectional

  4. Cyclic

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Correct Option: A

Choose the correct answer from the alternatives given.
Active transport from outside to inside of molecules across a membrane requires:

botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

  1. cyclic AMP

  2. acetyl chlorine

  3. ATP

  4. lecithin

Show answer
Correct Option: C
Explanation:

Active transport, which is the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration, requires the assistance of a type of protein called a carrier protein, using energy supplied by ATP. So, the correct option is 'ATP'.

Sucrose moves into sieve tube elements by?

botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

  1. Diffusion

  2. Endosmosis

  3. Active transport

  4. Exosmosis

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Correct Option: C
Explanation:

The mechanism used for the translocation of sugars from source to sink is called the pressure flow hypothesis. As glucose is prepared at the source, it is converted to sucrose. This is moved into the companion cells and then into the living phloem sieve tube cells by active transport. Again active transport is necessary to move the sucrose out of the phloem sap and into the cells which will use the sugar converting it into energy. 


Hence, the correct answer is option C.

Assertion : Auxins promote apical dominance by suppressing the activity pf lateral buds.

Reason : In moriculture, periodic pruning of shoot tips is done to make mulberry plants bushy.

biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

  1. If both the assertion and reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reaon is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: A
Explanation:

Auxin is produced by shoot tip and acts as a growth promoter for apical bud and inhibit the growth of lateral buds. When a terminal bud is removed, the nearest axillary buds begin to grow and the plant branches rapidly. In case of mulberry plants, pruning is done to remove apical dominance and causes more branching of the main body of the plant.

Pneumatophores are common in?

biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

  1. Alpine plants

  2. Heliophytes

  3. Hygrophytes

  4. Mangroves

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Correct Option: A

Read names of the following plants
(i) Nicotiana tobacum
(ii) Candytuft
(iii) Brinjal
(iv) Zinnia
(v) Capsicum
Which of these belong to the family Solanaceae?

biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

  1. (i), (ii) and (iii)

  2. (i), (ii) and (v)

  3. (i), (ii), (iii) and (v)

  4. (i), (iii), (v)

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Correct Option: C
Explanation:

Only Nicotiana tobacum, Brinjal, and Capsicum belong to the family Solanaceae.

So, the correct option is '(i), (iii), (v)'.

If a biologist is to nomenclate a similar species, he will study.

biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

  1. Syntype

  2. Isotype

  3. Neotype

  4. Paratype

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Correct Option: B
Explanation:

Isotype (in plant scientific classification) A plant example that is a copy of or fundamentally the same as the sort example and can be utilized as a source of perspective example if the sort example is lost.

So, the correct option is 'Isotype'.

Join properly Column-I and Column-II.

Column-I Column-II
(a) Henking $(1)$ Study of chromosomes in plants
(b) Bridges $(2)$ Environmental effect of sex determination
(c) Baltzer $(3)$ X-body
(d) Allen $(4)$ Law of genetic balance
biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

  1. a-$4$, b-$3$, c-$2$, d-$1$

  2. a-$3$, b-$2$, c-$4$, d-$1$

  3. a-$3$, b-$4$, c-$2$, d-$1$

  4. a-$1$, b-$2$, c-$3$, d-$4$

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Correct Option: A