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Cell Organelles (Class XI/XII)

Description: Mitochondrion lysosomes microtubuls microfilaments Golgi Bodies/DictyosomesGolgi ApparatusMitochondriaMitochondriaClass XI / XIILysosomesLysosomesRibosomesRibosomes and CytoskeletonPlastidsPlastids
Number of Questions: 15
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Tags: Mitochondrion lysosomes microtubuls microfilaments Golgi Bodies/Dictyosomes Golgi Apparatus Mitochondria Class XI / XII Lysosomes Ribosomes Ribosomes and Cytoskeleton Plastids
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According to Huxley, the physical basis of life is

  1. cell

  2. protoplasm

  3. nucleus

  4. mitochondria


Correct Option: B
Explanation:

Protoplasm was termed as the physical basis of life by Huxley.

What are the flat membrane bound structures that together comprise golgi apparatus called?

  1. Perioxisomes

  2. Vesicles

  3. Dictyosomes

  4. Endoplasmic reticulum


Correct Option: C
Explanation:

Dictyosomes are flat membrane bound structures that together comprise golgi apparatus.

The process of oxidative phosphorylation takes place in the

  1. F1 particles of inner mitochondrial membrane

  2. matrix of mitochondria

  3. cytoplasm

  4. outer mitochondrial membrane


Correct Option: A
Explanation:

F1 particles of inner mitochondrial membrane are involved in oxidative phosphorylation.

The enzyme succinate dehydrogenase involved in TCA cycle is found in the

  1. matrix of mitochondria

  2. outer membrane of mitochondria

  3. inner mitochondrial membrane

  4. inter-membrane space


Correct Option: C
Explanation:

Succinate dehydrogenase is located on the inner surface of the inner mitochondrial membrane.

Which sub-units constitute the mitochondrial ribosomes?

  1. 60S and 40S

  2. 30S and 50S

  3. 60S and 50S

  4. 30S and 40S


Correct Option: B
Explanation:

30S and 50S are sub-units of 70S ribosomes.

What are lysosomes with undigested phogosome residues called?

  1. Autophagosomes

  2. Residual bodies

  3. Spherosomes

  4. Glyoxosomes


Correct Option: B
Explanation:

Residual bodies are the lysosomes with undigested residues which are left after digestion of phagosomes.

Newly pinched off vesicles from golgi body are called

  1. secondary lysosomes

  2. residual bodies

  3. primary lysosomes

  4. autophagosomes


Correct Option: C
Explanation:

Primary lysosomes are newly pinched off vesicles from golgi body.

The mitochondria electron transport chain takes place in the

  1. matrix

  2. inner-membrane

  3. outer-membrane

  4. inter-membrane space


Correct Option: B
Explanation:

Electron transport chain takes place in the inner-membrane of mitochondria.

What does the fusion of primary lysosomes with phagosome yield?

  1. Residual body

  2. Secondary lysosome

  3. Autophagosome

  4. Spherosome


Correct Option: B
Explanation:

Secondary lysosome is formed from fusion of primary lysosome with phagosome.

Which of the following statements is incorrect?

  1. S stands for sedimentation coefficient of ribosome.

  2. High concentration of Mg ions is required for the attachment of ribosomal units.

  3. Ribosomes are porous organelles.

  4. Ribosomes are formed inside nucleolus.


Correct Option: B
Explanation:

Low concentration of Mg ions is required for the attachment of ribosomal sub-units.

The TCA cycle enzymes are located in the

  1. cristae of mitochondria

  2. matrix of mitochondria

  3. inter-membrane space of mitochondria

  4. inner boundary membrane of mitochondria


Correct Option: B
Explanation:

The matrix of mitochondria contains enzymes for TCA cycle.

At which stage of mitosis do microtubules form spindle?

  1. Metaphase

  2. Anaphase

  3. Prophase

  4. Interphase


Correct Option: C
Explanation:

Spindle formation starts at prophase.

What are microsomes?

  1. Vesicles of golgi bodies

  2. Vesicles of endoplasmic reticulum

  3. Newly formed lysosomes

  4. Microbodies


Correct Option: B
Explanation:

Microsomes are vesicular structures of endoplasmic reticulum.

Which of the following cell organelles have a contractile function?

  1. Microtubules

  2. Microfilaments

  3. Intermediate filaments

  4. Flagella


Correct Option: B
Explanation:

Microfilaments have a contractile function.

Which of the following are protein-storing plastids?

  1. Amyloplasts

  2. Elaioplasts

  3. Aleuroplasts

  4. Phaeoplasts


Correct Option: C
Explanation:

Aleuroplasts are protein-storing plastids.

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