Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Which one of the following compounds is NOT a member of the electron transport chain?

  1. Ubiquinone

  2. Cytochrome C

  3. Carnitine

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

Carnitine is an amino acid derivative responsible for transporting fatty acids into the mitochondria for beta-oxidation, but it is not part of the mitochondrial electron transport chain. Ubiquinone, Cytochrome C, and NAD (or NADH dehydrogenase) are all core components of the electron transport chain.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Choose the correct answer from the alternatives given.
At the time of heavy rain, minerals in upper layers of the soil move downward by a process known as:

  1. weathering

  2. leaching

  3. erosion

  4. smearing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Leaching is draining away from soil, ash, or similar material by the action of percolating liquid, especially rainwater downwards.

So the correct answer is "leaching"

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Read the given statements and selected the correct option.
Statement 1: Xylem transport is unidirectional.
Statement 2: Phloem transport is bidirectional.

  1. Both statement 1 and 2 are correct and statement 2 is the correct explanation of statemnet 1

  2. Both statement 1 and 2 are correct and statement 2 is not the correct explanation of statement 1

  3. Statement 1 is correct and statement 2 is incorrect

  4. Both statement 1 and 2 are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Xylem transport is primarily unidirectional (roots to leaves) due to transpiration pull. Phloem transport is bidirectional (source to sink), as sugars can be moved to various parts of the plant depending on metabolic needs.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

The primary difference between the aopolast and the symplast is that the

  1. apoplast is nonliving spaces and cell walls

  2. apoplast relies on active transport

  3. symplast is nonliving spaces and cell walls

  4. apoplast prevents passive diffusion.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Apoplast and symplast are two routes used by plants to transport water from root hair cells to the xylem of the root. Apoplast includes the non-living components of a plant such as cell walls and the intracellular spaces. The main difference between apoplast and symplast is their mechanism of the water movement.

So, the correct option is 'apoplast is non-living spaces and cell walls'.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

The movement of water and minerals in xylem and the movement of phloem sap in phloem is ............... and .................... respectively

  1. Unindirectional, bidirectional

  2. Bidirectional, bidirectional

  3. Bidirectional, unidirectional

  4. Unindirectional, unidirectional
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The movement of water and minerals in xylem and the movement of phloem sap in phloem is unidirectional and bidirectional respectively. Plants need water for their growth, and it uptakes water through the roots. Water that is taken by the roots has to reach all the leaves or branches, here the xylem function as transportation of water. Therefore, the movement of water and minerals in xylem is always an unidirectional. Whereas, the movement of phloem is bidirectional this is because, once the food is synthesized it is the phloem that transfers the food to all the parts of plants wherever it is necessary.

So, the correct answer is option A.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Choose the correct answer from the alternatives given.
By what method arc ions absorbed by plants?

  1. Along DPD gradient

  2. By molecular diffusion

  3. By carriers and pumps

  4. Along water potential gradients
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 For plants to take up mineral ions, ions are moved into root hairs, where they are in a higher concentration than in the dilute solutions in the soil. Active transport (pumps) then occurs across the root so that the plant takes in the ions it needs from the soil around it. The root hair cells have carrier molecules on their surface that pick up the minerals and move them into the cell against the concentration gradient.

So, the correct option is, 'By carriers and pumps'.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

The direction of water in Cycas leaflets is 

  1. Upward

  2. Downward

  3. Lateral

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(A) The upward flow of the water is seen in the roots of the plant.

(B) Downward flow is seen in the bulk transportation from leaf to every other part of the plant.
(C) Lateral flow of water is seen in leaf and roots due to the diffusion patterns.
So. the correct answer is 'Lateral'

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Choose the correct answer from the alternatives given.
Minerals are absorbed in:

  1. meristematic zone

  2. root hair zone

  3. elongation zone

  4. root cap zone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants absorb their mineral salt supply from the soil through the roots from the zones of elongation and root hair. The minerals are absorbed as ions which are accumulated by the plants against their concentration in the soil.

So, the correct option is, 'Elongation zone'.

Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

Choose the correct answers from the alternatives given.
The energy source that drives the upward flow of water is

  1. Light

  2. Glucose

  3. ATP

  4. Solar heat
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar heat causes the evaporation of water from the surface of the leaves in form of water vapour through small openings called stomata. This loss is known as transpiration. Due to the loss of water, water stress condition is created that forces the upward movement of water from the soil towards the shoot system. This water is then again distributed to various plant parts.

Hence, the correct answer is 'Solar heat'.

Multiple choice biology structural organization of animals structural organization of rabbit structural organization of leech phylum annelida

Pelvic girdle of rabbit consist of
                           Or
The coal of the Pelvic girdle is formed by the fusion of


  1. Ilium, ischium & pubis

  2. Ilium, ischium & coracles

  3. Coracoid, scapula & clavicle

  4. Ilium, coracles & scapula
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pelvic girdle comprises of the usual three bones ilium, ischium and pubis which are fused together into a single innominate or hip bone.