Tag: water absorption and ascent of sap in plants

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Questions Related to water absorption and ascent of sap in plants

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

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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

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

Difference between active and passive modes of membrane transport is

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice botany water absorption and ascent of sap in plants active transport and passive transport types of plant transport atp

Active transport of solutes in a living system is?

  1. Unidirectional

  2. Bidirectional

  3. Multidirectional

  4. Cyclic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Active transport is typically unidirectional because it involves specific pumps or carrier proteins that move solutes against a gradient in one specific direction. While some systems may have multiple transporters, the mechanism of a single active transport pump is inherently directional.

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

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

  1. cyclic AMP

  2. acetyl chlorine

  3. ATP

  4. lecithin
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Sucrose moves into sieve tube elements by?

  1. Diffusion

  2. Endosmosis

  3. Active transport

  4. Exosmosis
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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?

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

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

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

  4. (i), (iii), (v)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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

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

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

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

  1. Syntype

  2. Isotype

  3. Neotype

  4. Paratype
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

  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-$4$
Reveal answer Fill a bubble to check yourself
A Correct answer