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What is the correct answer?

4

pH of vacuolar cell sap is

A. neutral and isotonic.

B. alkaline and isotonic.

C. acidic and hypertonic.

D. equal to cytoplasm and isotonic.

Correct Answer :

C. acidic and hypertonic.


Vacuole is a non - living reservoir, bounded by a selectively permeable membrane, the tonoplast. It is not a air filled cavity but it is filled with a highly concentrated solution called vascular sap or cell sap. pH of vacuolar cell sap is acidic and hypertonic.

Related Questions

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4

Read the statements given below with regard to the functions performed by Golgi apparatus ?
  1. Transport and chemically modify the materials contained within it.
  2. Performs the function of packaging materials.
  3. Important site of formation of glycoproteins and glycolipids.

Which of the following is the correct answer ?

A. (i) is wrong but (ii) and (iii) are correct

B. (ii) is wrong but (i) and (iii) are correct

C. (ii) and (iii) are wrong but (i) is correct

D. All are correct.

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4

The given figures show two types of cell. Which structures are common to both the cells?

A. Nucleus and cell wall

B. Nucleus and cytoplasm

C. Ribosomes and flagella

D. Ribosomes and cell wall

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4

Both the membranes of mitochondrion are

A. structurally different but functionally similar.

B. structurally as well as functionally different.

C. structurally similar but functionally different.

D. structurally different but functionally similar.

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4

Match column I (cell type) with column II (size) and choose the correct option.
Column-IColumn-II
(Cell type)(Size)
A. VirusesI. 1-2 ??m
B. PPLOII. 10-20 ??m
C. Eukaryotic cellIII. About 0.1 ??m
D. BacteriumIV. 0.02 - 0.2 ??m

A. A I, B II, C III, D IV

B. A IV, B III, C II, D I

C. A I, B III, C II, D IV

D. A IV, B II, C III, D I

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4

Which of the following terms is not correctly matched with its feature?

A. Osmosis Movement of water by diffusion.

B. Nucleoplasm Site of active synthesis of ribosomal RNA.

C. Mesosome Infolding of cell membrane and characteristics of eukaryotes.

D. Pili Elongated tubular surface structures (made of special protein) of bacteria.

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4

Match column-I with column-II and select the correct option.
Column - IColumn - II
A. RERI. Intracellular and extracellular digestion
B. Cell wallII. Provide structural support to the cell
C. FlagellaIII. Protein synthesis and secretion
D. LysosomesIV Responsible for cell movement

A. A III, B II, C IV, D I

B. A II, B III, C IV, D I

C. A I, B III, C II, D IV

D. A IV, B II, C III, D I

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4

Plastids storing fat are called

A. Elaioplasts

B. Sphaerosomes

C. Aleuroplasts

D. Pyrenoids

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4

Integral proteins of cell membrane occur on/in

A. inner surfaces

B. outer surfaces

C. phospholipid matrix

D. inner and outer surfaces

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4

Extension of plasma membrane in prokaryotic cell is

A. mesosome

B. haploid

C. ribosome

D. none of these

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4

Which of the following statements are incorrect ?
  1. Plant cells have centrioles which are absent in almost all animal cells.
  2. Ribosomes are the site of protein synthesis.
  3. The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
  4. In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum. Of the above statements

A. (i) and (iii)

B. (iii) and (iv)

C. (ii) and (iv)

D. (i) and (iv)

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4

Identify the cell organelle given below. Which is an important site of formation of glyeoproteins & glycolipids

A. Rough endoplasmic reticulum

B. Smooth endoplasmic reticulum

C. Golgi body

D. mitochondria

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4

Match column-I (cell organelle) with column-II membrane and select the correct option from the codes given below.
Column-IColumn-II
A. MitochondriaI. Without membrane
B. LysosomesII. Single membrane
C. RibosomesIII. Double membrane

A. A - I, B - II, C - III

B. A - III, B - I, C - II

C. A - III, B - II, C - I

D. A - II, B - III, C - I

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4

Which one of the following organelle given below is correctly matched with its function ?

A. Golgi apparatus Protein synthesis

B. Golgi apparatus Formation of glycolipids

C. Rough endoplasmic reticulum Protein synthesis

D. Rough endoplasmic reticulum Formation of glycoproteins

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4

_______________ is the important site of formation of glycoproteins and golycolipids.

A. SER

B. Lysosome

C. Golgi apparatus

D. Mitochondria

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4

Which one of the following cellular parts is correctly matched with their characters ?

A. Centrioles Sites for active RNA synthesis.

B. Lysosomes Optimally active at a pH of about 8.5.

C. Thylakoids Flattened membranous sacs forming the grana of chloroplasts.

D. Ribosomes Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S).

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4

Which one of the following structures between two adjacent cells is an effective transport pathway?

A. Plasmodesmata

B. Plastoquinones

C. Endoplasmic reticulum

D. Plasmalemma

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4

Axoneme with 9 + 2 microtubular arrangement occurs in

A. cilia

B. flagella

C. both (a) and (b)

D. centriole

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4

The diagram given below represent a filuid mosaic model of plasma membrance. Match the components marked as A, B, C, D and E in the diagram below from the list (i) to (vii).

  1. Sugar
  2. Protein
  3. Lipid bilayer
  4. Integral protein
  5. Cytoplasm
  6. Cell wall
  7. External protein

A. A - (i), B - (ii), C - (iii), D - (iv), E - (v)

B. A - (ii), B - (i), C - (iii), D - (iv), E - (v)

C. A - (i), B - (ii), C - (iii), D - (iv), E - (vi)

D. A - (i), B - (ii), C - (iii), D - (vii), E - (v)

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4


Which function is carried out by the cell organelle 'X'?

A. helps control the movement of substance in and out of the cell

B. passes information from the parent cell to newly formed cell

C. maintains the proper shape of the cell and serves as a protective barrier

D. helps the cell to make food with the help of chlorophyll and sunlight

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4

The best way to identify a cell as either prokaryotic or eukaryotic is to determine whether

A. it came from a single-celled or multicellular organism.

B. it has a nucleus.

C. it has a plasma membrane.

D. it has cytosol.

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4

Choose the incorrect match.

A. Nucleus RNA

B. Lysosome Protein synthesis

C. Mitochondria Respiration

D. Cytoskeleton Microtubules

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4

Satellite means

A. terminal part of the chromosome beyond secondary constriction.

B. terminal part of the chromosome beyond primary constriction.

C. terminal part of chromosome beyond tertiary constriction.

D. none of the above

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4

An organalle devoid of membrane covering is

A. vacuole

B. ribosome

C. peroxisome

D. lysosome

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4

Which of these is wrongly matched?

A. Chloroplasts Chlorophyll

B. Elaioplasts Starch

C. Chromoplasts Carotenoids

D. Amyloplasts Carbohydrates

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4

Polysome is a chain of

A. oxysomes

B. sphaerosomes

C. ribosomes

D. dictyosomes

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4

Golgi apparatus is absent in

A. higher plants

B. yeast

C. bacteria and blue-green algae

D. None of the above

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4

pH of vacuolar cell sap is

A. neutral and isotonic.

B. alkaline and isotonic.

C. acidic and hypertonic.

D. equal to cytoplasm and isotonic.

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4

Select the statements which are related to Schwann.
  1. He reported that cells have a thin outer layer which is today known as plasma membrane
  2. Cell wall is a unique character of the plant cell.
  3. Body of plants and animals are composed of cells and products of cells.

A. Only (i)

B. Only (iii)

C. (i) and (iii)

D. All of these

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4

Which of the following pair are correctly matched ?
(I) Amyloplasts Store proteins
(II) Mitochondrion Power house of the cell
(III) Stroma Chlorophyll pigment
(IV) Axoneme 9 + 2 array

A. (I) and (III) only

B. (II), (III) and (IV) only

C. (III) and (IV) only

D. (II) and (IV) only

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4

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is

A. chloroplast

B. mitochondria

C. lysosome

D. endoplasmic reticulum