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4

Active transport across biomembrane involves

A. production of ATP

B. requirement of energy

C. production of toxin

D. release of energy

Correct Answer :

B. requirement of energy


An energy dependent process, in which ATP is utilised is called an active transport. e.g., Na+ / K+ Pump.

Related Questions

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4

The cytoskeleton is a proteinaceous network of fibres in the cytoplasm. It is involved in

A. mechanical support.

B. motility.

C. maintenace of cell-shape.

D. all of the above

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4

Which of the following statement of a bacterial cell is/are correct?
  1. Mesosome is formed by the extensions of plasma membrane into the cell.
  2. The pili are elongated tubular structures made up of a protein.
  3. Flagellum is composed of filament, hook and basal body.
  4. Ribosomes are about 30 nm by 50 nm in size.

A. (i), (ii), (iii)

B. All of the above

C. (ii) & (iv)

D. None of the above

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4

Match column-I (scientists) with column-II (discovery) and select the correct option.
Column-IColumn-II
A. LeeuwenhoekI. First saw and described a living cell
B. Robert BrownII. Presence of cell wall is unique to plant cells
C. SchleidenIII. Discovered the nucleus
D. SchwannIV. All plants are composed of different kind of cells

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

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

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

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

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4


Which cellular structure helps in transferring genetic information from one generation to another?

A. W

B. X

C. Y

D. Z

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Given below are some characters of a cell organelle identify the correct organelle which shows all the characters described above.
  1. It is a membrane bound space found in the cytoplasm.
  2. It is bound by a single membrane called tonoplast.
  3. It contains water, sap, excretory products and other materials not useful to the cell.
  4. It has higher concentration of sap than the cytoplasm.

A. Golgi apparatus

B. Lysosomes

C. Endoplasmic reticulum

D. Vacuoles

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Grana are

A. protein storing plastids.

B. coloured plastids.

C. stacks of thylakoids.

D. individual thylakoids present in stroma.

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Who proposed the theory that Cells arise only from the pre-existing cells?

A. Mohl

B. Virchow

C. Haeckel

D. Brown

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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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9.A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which the student infers that the samples contain the organelles.
Sample ASample B
Make energy available for cellular metabolismGenerates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the bodyPresent in plant cell
Called the energy currency of cellSource o f all the food energy

Explain why the samples were belonged to eukaryotic cell and not prokaryotic cell? Because,

A. eukaryotic cell have membrane bound organelles.

B. eukaryotic cell have non - membrane bound organelles.

C. eukaryotic cell are smaller and multiply more rapidly than prokaryotic cells.

D. eukaryotic cell are larger and multiply more rapidly than prokaryotic cells.

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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

The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D).

Select the part correctly matched with its function.

A. Part (D): Outer membrane Gives rise to inner membrane by splitting.

B. Part (B): Inner membrane Forms infoldings called cristae.

C. Part (C): Cristae Possess single circular DNA molecule and ribosomes.

D. Part (A): Matrix Major site for respiratory chain enzymes.

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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

Nucleolus is

A. rounded structure found in cytoplasm near nucleus.

B. rounded structure inside nucleus and having rRNA.

C. rod-shaped structure in cytoplasm near the nucleus.

D. none of the above.

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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 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 of the following statements is/are correct ?
  1. The shape of the cells may vary with the function they perform.
  2. Human RBC is about 7.0 ??m in diameter.
  3. Cytoplasm is the main area of cellular activities.
  4. Various chemical reactions occur in cytoplasm to keep the cell in the living state.

A. (i), (ii), (iii) and (iv)

B. Only (i) and (ii)

C. Only (iv)

D. None of the above

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4

The given diagram shows the sectional view of a mitochondrion.

Identify the parts labelled as A, B, C, D & E

A. A - Outer membrane, B - Inner membrane, C - Matrix, D - Inter- membrane space, E - Crista

B. A - Outer membrane, B - Inner membrane, C - Intermembrane space, D - Matrix, E - Crista

C. A - Outer membrane, B - Inner membrane, C - Matrix, D - Crista, E - Inter - membrane space

D. A - Outer membrane, B - Inner membrane, C- Crista, D - Matrix, E - Inter-membrane space

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4

Match column-I with column-II and choose the correct option.
Column-IColumn-II
(Chromosome)(Position of Centromere)
A. MetacentricI. At the tip
B. SubmetacentricII. Almost near the tip
C. AcrocentricIII. At the middle
D. TelocentricIV. Slightly away from the middle

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

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

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

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

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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

Which of the following option correctly match A, B, C, and D indicated in the given sectional view of chloroplasts.

A. A - Thylakoid, B-Stromal lamella, C - Stroma, D - Granum

B. A - Granum, B - Thylakoid, C - Stromal lamella, D - Stroma

C. A - Thylakoid, B - Granum, C - Stromal lamella, D - Stroma

D. A - Granum, B - Thylakoid, C - Stroma, D - Stromal lamella

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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

Function of RER is

A. autolysis

B. protein synthesis

C. lipid synthesis

D. carbohydrate synthesis

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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

Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting into a pellets in the bottom of the centrifuge tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?

A. Cytosol

B. Mitochondria

C. Lysosomes

D. Golgi bodies

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4

Polysome is a chain of

A. oxysomes

B. sphaerosomes

C. ribosomes

D. dictyosomes

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4

Select the correct match of the types of neuron present in column I with its location given in column II.
Column IColumn II
A. Centrioles(i) Non-membrane bound organelle which helps in cell division
B. Fimbriae(ii) Special structure of bacteria which help them to attach with rocks in stream and also to host tissue
C. Endomembrane(iii) Includes those organelles system whose functions are coordinated
D. Mitochondria(iv) Divide by fission and site of aerobic respiration

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

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

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

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

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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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Identify the components labelled as A, B, C, D and E in the diagram given below from the list (i) to (viii).

  1. Cristae of mitochondria
  2. Inner membrane of mitochondria
  3. Cytoplasm
  4. Smooth endoplasmic reticulum
  5. Rough endoplasmic reticulum
  6. Mitochondrial matrix
  7. Ribosome
  8. Nucleus

A. A - (viii), B - (v), C - (vii), D - (iii), E - (iv)

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

C. A - (vi), B - (v), C - (iv), D - (vii), E - (i)

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

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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

Read the folowing statements and identify the correct option.
  1. Contractile vacuole takes part in osmoregulation and excretion.
  2. Food vacuole is formed by engulfing the food particles.
  3. The vacuole is bound by a double membrane called tonoplast.
  4. Vacuole can occupy upto 90 percent of the volume of the cell.

A. (i) and (ii)

B. (ii) and (iv)

C. (i), (ii) and (iv)

D. None of the above