Cell - The Unit of Life · Biology · NEET

 Mitochondrial inner membrane encloses $\_\_\_\_$ .

Cell theory was formulated by $\_\_\_\_$

The plastid that stores xanthophyll is known as $\_\_\_\_$ .

Smooth endoplasmic reticulum $\_\_\_\_$ .

Which of the following are characteristics of prokaryotic cells?

(a) Ribosomes are made of 50 S and 30 S subunits

(b) They can have plasmids

(c) They contain mesosome

(d) They have peroxisomes

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Endomembrane system includes $\_\_\_\_$ .

Which one of the following is the site for active ribosomal RNA synthesis?

Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are $\_\_\_\_$ .

Choose the correct statements regarding cell organelles and their inclusions.

A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.

B. Rough endoplasmic reticulum bears ribosomes on its surface.

C. Both mitochondria and plastids have circular DNA.

D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.

E. Mitochondrion is a single membrane-bound structure.

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Select the correct statements regarding cell membrane in eukaryotic cell.

A. Membrane of human RBCs has approximately $52 \%$ protein.

B. Major phospholipids are arranged in a bilayer.

C. Extensions of the plasma membrane into the cell form mesosomes.

D. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium.

E. Glycocalyx is present on the outer surface of the plasma membrane.

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Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R).

Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.

Reason (R) : Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.

In the light of the above statements, choose the correct answer from the options given below :

From the statements given below choose the correct option :

A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.

B. Each ribosome has two sub-units.

C. The two sub-units of 80 S ribosome are 60 S and 40 S while that of 70 S are 50 S and 30 S .

D. The two sub-units of 80 S ribosome are 60 S and 20 S and that of 70 S are 50 S and 20 S .

E. The two sub-units of 80 S are 60 S and 30 S and that of 70 S are 50 S and 30 S .

A specialised membranous structure in a prokaryotic cell which helps in cell well wall formation, DNA replication and respiration is

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Mesosome in a cell is a :

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Match List-I with List-II.

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Given below are two statements :

Statement I : Concentrically arranged cisternae of Golgi complex are arranged near the nucleus with distinct convex cis or maturing and concave trans or forming face.

Statement II : A number of proteins are modified in the cisternae of Golgi complex before they are released from cis face.

In the light of the above statements, choose the correct answer from the option given below.

Match List I with List II

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The DNA present in chloroplast is:

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Given below are two statements:

Statement I: Mitochondria and chloroplasts both double membranes bound organelles.

Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast.

In the light of the above statements, choose the mis appropriate answer from the options given below:

Given below are two statements :

Statement I :- In bacteria, the mesosomes are formed by the extensions of plasma membrane.

Statement II :- The mesosomes, in bacteria, help in DNA replication and cell wall formation.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following statements are correct with respect of Golgi apparatus ?

(A) It is the important site of formation of glycoprotein and glycolipids.

(B) It produces cellular energy in the form of ATP.

(C) It modifies the protein synthesized by ribosomes on ER.

(D) It facilitates the transport of ions.

(E) It provides mechanical support.

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In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as

How many different proteins does the ribosome consist of?

Which of the following are NOT considered as the part of endomembrane system?

A. Mitochondria

B. Endoplasmic reticulum

C. Chloroplasts

D. Golgi complex

E. Peroxisomes

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Which of the following functions is carried out by cytoskeleton in a cell?

The Phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as

Match List-I with List-II

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Which type of substance would face difficulty to pass through the cell membrane?

If the pH in lysosomes is increased to alkaline, what will be the outcome?

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?