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51.	Which part of the cell contains water-like substances with dissolved molecules and suspended in them?(a) Protoplasm(b) Cytoplasm(c) Cytosol(d) MatrixI have been asked this question by my school principal while I was bunking the class.Question is from Plant-Water Relations-1 in division Transport in Plants of Biology – Class 11
Answer» The correct answer is (a) Protoplasm The explanation is: Protoplasm of the CELL is a FLUID, similar to water, contains all the molecules in it. Cytoplasm contains all the particles inside the MEMBRANE of a cell. Cytosol is a part of cytoplasm POSSESSING all the organelles excluding the cell nucleus. Matrix is a fluid present in different TYPES depending upon the type of specialized structure such as stroma is the matrix of chloroplast.

52.	Which of the following is a reversible phenomenon?(a) Plasmolysis(b) Turgidity(c) Flaccidity(d) ImbibitionI had been asked this question during an interview.This is a very interesting question from Plant-Water Relations-2 in chapter Transport in Plants of Biology – Class 11
Answer» Correct option is (a) PLASMOLYSIS The explanation is: Only plasmolysis is a reversible phenomenon as the CELL can become normal when shifted to hypotonic solution. When the cell is already in hypotonic solution it swells and bursts, THEREFORE, cannot be reversed. Flaccid cell is an ideal cell where there is continuous flow of water in and out of the cell. IMBIBITION aids in germination which is again a non-reversible PROCESS.

53.	The space between the cell wall and the shrunken protoplast in a plasmolysed cell is occupied by ________(a) hypotonic solution(b) hypertonic solution(c) isotonic solution(d) waterI had been asked this question in semester exam.This interesting question is from Plant-Water Relations-2 topic in portion Transport in Plants of Biology – Class 11
Answer» The correct choice is (b) hypertonic solution To elaborate: The protoplast SHRINKS in presence of hypertonic solution, swells in presence of hypotonic solution and BECOMES flaccid in isotonic condition. Water is HELPFUL in dilution or in BRINGING isotonic condition.

54.	Element which cannot be remobilized include _______(a) N(b) P(c) K(d) CaThe question was asked by my school teacher while I was bunking the class.I need to ask this question from Transport of Mineral Nutrients in division Transport in Plants of Biology – Class 11
Answer» Right option is (d) Ca The EXPLANATION: ELEMENTS such as N, P and K get readily mobilized from OLDER parts to younger ones before the DEATH of the PLANT or before new growth appears. Ca, being a part of the structure of the cell wall and middle lamella does not move to the younger parts.

55.	The pressure built up against the cell wall of a plant cell due to diffusion of water causes the cell to become _________(a) flaccid(b) turgid(c) plasmolysed(d) imbibedI got this question in an internship interview.Question is taken from Plant-Water Relations-2 topic in section Transport in Plants of Biology – Class 11
Answer» The correct option is (b) turgid The best I can explain: In HYPOTONIC solution, water enters into the resulting in pressure being developed against the wall and the cell BECOMES turgid. The cell becomes flaccid in isotonic solution, plasmolysed in hypertonic solution and imbibed when imbibition TAKES place which is ALSO a kind of hypotonic solution ACTIVITY.

56.	Diffusion is a common process in fluids, but diffusion in solids rather than of solids is more likely.(a) True(b) FalseThe question was posed to me in homework.I'm obligated to ask this question of Plants topic in chapter Transport in Plants of Biology – Class 11
Answer» The CORRECT answer is (a) True To explain I would SAY: In case of SOLIDS, the molecules of one substance do not get inside the intercellular spaces of another substance as they are rigid in nature. But there are intermolecular spaces in between molecules of solids, however small they may be. So, diffusion of fluids in that SPACE is very much possible.

57.	Which among the following is not the property of proteins present in the membrane that support facilitated diffusion?(a) Not liable to saturate(b) Response to inhibitors(c) Regulated by hormones(d) Highly selectiveI had been asked this question during an online interview.My query is from Plants in division Transport in Plants of Biology – Class 11
Answer» Right answer is (a) Not liable to saturate To elaborate: PROTEINS are liable to saturate, respond to inhibitors, under HORMONAL regulation and highly selective, thus, are responsible for FACILITATED diffusion.

58.	Root system in a plant develops well when __________(a) deficiency of copper(b) absorption of water increases(c) deficiency of auxin(d) deficiency of ABAThis question was addressed to me during an online interview.The question is from Transportation in Plants topic in portion Transport in Plants of Biology – Class 11
Answer» The correct choice is (b) absorption of water increases Easiest EXPLANATION: ROOT system in a plant develops well when absorption of water increases. DEFICIENCY of copper of leads to necrosis. Deficiency of auxin leads to excess DIFFERENTIATION of xylem. Deficiency of ABA leads to non-closure of stomata even during water stress CONDITIONS.

59.	Cytoplasmic streaming is a form of active transport for short distances.(a) True(b) FalseThis question was posed to me by my school principal while I was bunking the class.My doubt is from Transportation in Plants topic in division Transport in Plants of Biology – Class 11
Answer» RIGHT option is (a) True For explanation I would say: CYTOPLASMIC streaming aids ACTIVE TRANSPORT of substances for short distances. It is a type of symplastic movement and observed in CELLS of Hydrilla and Tradescantia.