0 of 45 Questions completed
Questions:
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 45 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
The cell organelles that does not constitute an endomembrane system in a cell is
(d)
The endomembrane system is a network of interconnected membranes within a eukaryotic cell that includes the endoplasmic reticulum (ER), Golgi complex, lysosomes, and vacuoles. Peroxisomes, while also membrane-bound organelles, are not considered part of the endomembrane system because their functions are distinct and not directly coordinated with the other organelles in this system.
Select the incorrect match from the following
(B)
While the nucleoplasm is the fluid inside the nucleus, the term “nuclear matrix” refers to a specific protein network within the nucleoplasm, not being synonymous with it.
Mesosomes in prokaryotes
(i) Are specialised differentiated form of cell membrane
(ii) Are essentially infoldings of cell membrane
(c)
Which of the following statements is correct?
(b)
A single-celled organism completes all its functions within that one cell, making this statement true
Select the incorrect match
(C)
Ribosomes seen in both eukaryotes and prokaryotes
Identify the organisms on the basis of given features.
a. There is no well defined nucleus
b. The genetic material is naked
c. Have cell wall
d. Ribosomes are present
(a)
Read the following statements and choose the correct option.
Statement A : The cell wall is selectively permeable in nature and interacts with the outside world.
Statement B : Plasma membrane in prokaryotes is similar structurally to that of eukaryotes
(b)
Read the following statements and choose the correct option
A. Ribosomes are the site of protein synthesis
B. The ribosomes of polysome translate the mRNA into proteins
(d)
Mark the wrong statement about plasma membrane
(d)
The wrong statement about the plasma membrane is (4): “Non-polar heads of saturated hydrocarbons are protected from aqueous environment” because the non-polar tails, not the heads, are hydrophobic and are protected from the aqueous environment by being tucked inside the phospholipid bilayer
Which of the following is not true regarding axoneme?
(c)
The statement that is not true regarding the axoneme is (3) “Has only one centrally located microtubule” because an axoneme actually has two centrally located microtubules, resulting in the “9+2” arrangement.
Read the following statements and choose the correct option
Statement A : Middle lamella holds the different neighbouring plant cells.
Statement B : Ripening of fruits is due to solubilization of pectate compounds of middle lamella.
(c)
Mitosis does not
(c)
Mitosis is a type of cell division that produces two identical daughter cells from a single parent cell. These daughter cells are genetically identical to the parent cell, meaning they carry the same genetic information. Since mitosis creates exact copies, it does not introduce any genetic variations. Variations in offspring arise from meiosis, the process of cell division that produces gametes (sperm and egg cells). Meiosis involves shuffling of chromosomes, resulting in different combinations of genes in each gamete. When these gametes fuse during fertilization, the resulting offspring have a unique combination of genes, leading to genetic variation. Mitosis, on the other hand, only produces genetically identical copies of the parent cell.
Which of the following feature is not true for
endoplasmic reticulum ?
(b)
The statement that is not true for the endoplasmic reticulum is (2): “SER is frequently observed in the cells actively involved in protein synthesis and secretion” because protein synthesis is primarily associated with the Rough Endoplasmic Reticulum (RER), not the Smooth Endoplasmic Reticulum (SER
Read the following statements and select the
correct option
A. Chromatin contain DNA and histones
B. Polyribosomes refers to the chain of ribosomes
attached to single mRNA
(c)
Which of the following statements is incorrect w.r.t lysosomes?
(d)
Active at acidic pH
Which of the following statements is wrong?
(b)
The incorrect statement is (2): Both the centrioles in a centrosome lie parallel to each other; actually, they are perpendicular to each other
Read the following statements :
Assertion (A) and Reason (R) and select the correct option
Assertion (A) – Golgi apparatus remains in close association with endoplasmic reticulum.
Reason (R) – Materials to be packaged in the form of vesicles from the ER, Fuse with the cis face of Golgi and move towards trans face.
(a)
Inanimate things have
(d)
Select the right option which relates to Schwann regarding the following statement
I. He reported that cell have a thin outer layer which is today known as plasma membrane
II. Cell wall is a unique character of the plant cell
III. Body of plants and animals are composed of cells and products of cells
(a)
Arrange the following cells in an ascending order of their sizes
I. Mycoplasma
II. Ostrich egg
III. Human RBC
IV. Bacteria
(b)
Select the incorrect match w.r.t the shape of the cell.
(d)
Columnar epithelial cells are characterized by their tall and column-like shape. They line various organs and tissues, such as the intestines and the respiratory tract. Amoeboid cells, like white blood cells, are known for their irregular, changing shape that allows them to move and squeeze through tissues. Therefore, “Columnar – Amoeboid epithelial cells” is the incorrect pairing.
Which of the following is not true about fimbriae?
(d)
Which one is correct about the bacterial cell envelope?
(c)
All of the following statements are correct about plasmids except-
Cell is the fundamental structural and functional unit of all living organisms. This statement can be best justified by the fact that:
(c)
Consider the given statements:
Statement 1: Anton von Leeuwenhoek first saw and described a live cell and Robert Brown discovered nucleus.
Statement 2: The invention of electron microscope revealed all the structural details of the cell.
(c)
Identify the correct statement regarding the cell envelope of a prokaryoitic cell:
I. The outermost layer of the cell envelope is called as the glycocalyx which may be present as a loose sheath called the slime layer or a thick and tough capsule.
II. The cell wall determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing.
III. Plasma membrane is selectively permeable in nature and interacts with the outside world.
IV. Bacterial cells can be classified as Gram positive and Gram negative based on the staining properties of their plasma membrane.
(a)
Incorrect. The classification into Gram-positive and Gram-negative bacteria is based on the structure of their cell wall, not the plasma membrane. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thinner peptidoglycan layer and an additional outer membrane.
Consider the two statements:
Statement I: In eukaryotic cells there is an extensive compartmentalization of cytoplasm.
Statement II: Membrane-bound organelles are present in a Eukaryotic cell.
(c)
Match the following columns and choose the correct
option.
\(
\begin{array}{|l|l|c|l|}
\hline & \text { Column-I } & & \text { Column-II } \\
\hline \text { a. } & \text { Fimbriae } & \text { (i) } & \begin{array}{l}
\text { Provide resistance to } \\
\text { anitibiotic }
\end{array} \\
\hline \text { b. } & \text { Chromatophore } & \text { (ii) } & \begin{array}{l}
\text { Help to attach the } \\
\text { host issue }
\end{array} \\
\hline \text { c. } & \text { Plasmid } & \text { (iii) } & \text { Inclusion body } \\
\hline \text { d. } & \text { Gas vacuole } & \text { (iv) } & \begin{array}{l}
\text { Contains } \\
\text { photosynthetic } \\
\text { pigments }
\end{array} \\
\hline
\end{array}
\)
\(
\begin{array}{lllll}
& \text { a } & \:\text { b } & \:\text { c } & \:\text { d } \\
\text { (1) } & \text { (iii) } & \text { (iv) } & \text { (i) } & \text { (ii) } \\
(2) & \text { (ii) } & \text { (i) } & \text { (iv) } & \text { (iii) } \\
(3) & \text { (ii) } & \text { (iv) } & \text { (i) } & \text { (iii) } \\
(4) & \text { (iii) } & \text { (i) } & \text { (iv) } & \text { (ii) }
\end{array}
\)
(c)
Match the following columns and choose the correct
option.
\(
\begin{array}{|l|l|l|l|}
\hline \text { a. } & \begin{array}{l}
\text { Rudolf } \\
\text { Virchow }
\end{array} & \text { (i) } & \begin{array}{l}
\text { Observation that plant } \\
\text { tisues are composed of } \\
\text { different kinds of cells }
\end{array} \\
\hline \text { b. } & \begin{array}{l}
\text { Theodore } \\
\text { Schwann }
\end{array} & \text { (ii) } & \begin{array}{l}
\text { First explained Omnis } \\
\text { cellula-e cellula }
\end{array} \\
\hline \text { c. } & \begin{array}{l}
\text { Anton Von } \\
\text { Leeuwenhoek }
\end{array} & \text { (iii) } & \begin{array}{l}
\text { Concluded that cell wall is } \\
\text { unique chracter of the plant } \\
\text { cell }
\end{array} \\
\hline \text { d. } & \begin{array}{l}
\text { Matthias } \\
\text { Schlelden }
\end{array} & \text { (iv) } & \text { First described a live cell } \\
\hline
\end{array}
\)
\(
\begin{array}{lllll}
& \text { a } & \:\text { b } & \:\text { c } & \:\text { d } \\
\text { (1) } & \text { (iv) } & \text { (i) } & \text { (ii) } & \text { (iii) } \\
\text { (2) } & \text { (ii) } & \text { (i) } & \text { (iv) } & \text { (iii) } \\
\text { (3) } & \text { (iv) } & \text { (iii) } & \text { (ii) } & \text { (i) } \\
\text { (4) } & \text { (ii) } & \text { (iii) } & \text { (iv) } & \text { (i) }
\end{array}
\)
(d)
State true (T) or false (F) for the given statements
and select the correct option
A. The onion peel cell has a distinct cell wall
B. The cytoplasm is the main arena of the cellular activities in both animal and plant cells
C. Microbodies are membrane-bound cell organelles
D. Mycoplasma is \(
0.3 \mu \mathrm{m}
\) in length
\(
\begin{array}{ccccc}
& \text { A } & \:\text { B } & \:\text { C } & \:\text { D } \\
\text { (1) } & \mathrm{F} & \mathrm{~T} & \mathrm{~T} & \mathrm{~T} \\
\text { (2) } & \mathrm{T} & \mathrm{~F} & \mathrm{~T} & \mathrm{~T} \\
\text { (3) } & \mathrm{T} & \mathrm{~T} & \mathrm{~T} & \mathrm{~F} \\
\text { (4) } & \mathrm{T} & \mathrm{~T} & \mathrm{~T} & \mathrm{~T}
\end{array}
\)
(d)
Identify the incorrectly matched pair regarding shape of bacterial cells:
\(
\begin{array}{|l|l|l|}
\hline 1 . & \text { Bacillus } & \text { Rod shaped } \\
\hline 2 . & \text { Coccus } & \text { Spherical } \\
\hline 3 . & \text { Vibrio } & \text { Icosahedral } \\
\hline 4 . & \text { Spirillum } & \text { Spiral } \\
\hline
\end{array}
\)
(c)
Vibrio is comma shaped
The number of correct statements regarding Golgi apparatus amongst the given statements will be: (total count of correct statement you have to tell)
I. The concave trans surface is the maturing face
II. The cis and trans faces are entirely different but interconnected
III. It remains in close association with the endoplasmic reticulum
IV. Site of formation of glycoproteins and glycolipids
(d)
All correct
Study the given diagram and select the correct statements regarding the parts labels I, II and III.
A: I are ribosomes and found only in eukaryotic cells.
B: II is Rough Endoplasmic Reticulum frequently observed in cells actively involved in protein synthesis and secretion.
C: III is Smooth Endoplasmic Reticulum which is a major site for synthesis of lipids.
(b)
Ribosomes are found in both prokaryotes and eukaryotes
The measure of fluidity of a cell membrane is:
(b)
Option 1: Proteins do not flip-flop between the two layers of the phospholipid bilayer. Their movement is primarily lateral within the same leaflet.
Option 3: While lipids can flip-flop between layers, this movement is rare and typically requires enzymatic assistance. It is not a primary contributor to membrane fluidity.
Option 4: Lipids can move laterally within the membrane, but this movement is not the primary measure of membrane fluidity. The ability of proteins to move laterally is a more significant factor.
Identify the correct statement(s) regarding the structure of a typical cell membrane:
I. The lipid component mainly consists of phosphoglycerides.
II. Peripheral proteins are either lying on the surface of the membrane or partially buried in it.
III. Carbohydrates are not a component of cell membrane.
IV. Cholesterol is a lipid and is a part of the cell membranes of animal cells.
\(
\begin{array}{|l|l|}
\hline \text { 1. Only I } & \text { 2. II and III only } \\
\hline \text { 3. I and IV only } & \text { 4. II and IV only } \\
\hline
\end{array}
\)
(c)
Peripheral membrane proteins are indeed associated with the surface of the lipid bilayer. However, they are not partially buried within the membrane.
Carbohydrates are also component of cell membrane
The endoplasmic reticulum:
I. divides the intracellular space into a luminal compartment and an extra-luminal [cytoplasm] compartment.
II. is called as rough ER if it shows ribosomes attached to its inner surface.
(b)
The term “rough” refers to the presence of ribosomes attached to the cytoplasmic (outer) surface of the endoplasmic reticulum membrane, not the “inner” surface. These ribosomes are involved in synthesizing proteins that are either secreted from the cell, incorporated into the cell’s plasma membrane, or sent to an organelle called the lysosome.
NCERT:- the endoplasmic reticulum (ER)
(Figure 8.5). Hence, ER divides the intracellular
space into two distinct compartments, i.e., luminal
(inside ER) and extra luminal (cytoplasm)
compartments.
The ER often shows ribosomes attached to
their outer surface. The endoplasmic reticulun
bearing ribosomes on their surface is called rough
endoplasmic reticulum (RER
Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statement is correct with respect to movements of lipids and proteins from one lipid monolayer to the other (described as flip flop movement) ?
(d)
Consider the two statements:
Statement I: Concentration of ions is significantly higher in the vacuole than in the cytoplasm.
Statement II: In plant cells, the vacuoles occupy up to 90% of the volume of the cell.
Identify the incorrect statement:
I. Nuclear envelope consists of two parallel membranes with a perinuclear space between them.
II. Nuclear pore is formed by the fusion of two nuclear membranes at points where they interrupt the nuclear envelope.
III. Large and more numerous nucleoli are present in the cells actively carrying out protein synthesis.
(d)
All are correct
The number of correct statements amongst the given statements would be:
1. The outer nuclear membrane is usually continuous with ER and also bears ribosomes
II. Nuclear pores allow movement of RNA and proteins in both directions between nucleus and cytoplasm
III. Satellite chromosomes have non-staining secondary constrictions at constant locations
IV. Microbodies are membrane bound vesicles containing various enzymes and are present in both plant and animal cells
(d)
All are correct NCERT statements
Identify the incorrect statement regarding mitochondria:
(a)
The statement is incorrect because the number of mitochondria per cell is not the same across all human cells. It varies depending on the cell’s function and energy requirements.
Identify the incorrect statement regarding chloroplasts:
(b)
The statement is incorrect because the inner chloroplast membrane is relatively less permeable compared to the outer membrane.
What would be true for the structures shown in the given diagram of chloroplast?
I: A is the site of the location of the enzymes for the biosynthetic phase of photosynthesis in higher plants.
II: B is the site for the location of the photosynthetic pigments organized into photosystems.
III: C lacks PS II as well as NADP reductase enzyme.
(b)
ONLY III Statement is correct
(III) Stroma lacks NADP REDUCTASE and PSII only PSI is present
(II)The stroma (B)does not contain the photosynthetic pigments organized into photosystems. These pigments are located in the thylakoid membranes of the chloroplasts.
(I) The statement is incorrect because the enzymes for the biosynthetic phase of photosynthesis are located in the stroma, not in the thylakoids.
Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with components:
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
\(
\begin{array}{|l|l|l|l|l|}
\hline & \text { A } & \text { B } & \text { C } & \text { D } \\
\hline \text { 1. } & \text { (i) } & \text { (iv) } & \text { (viii) } & \text { (vi) } \\
\hline \text { 2. } & \text { (vi) } & \text { (v) } & \text { (iv) } & \text { (vii) } \\
\hline 3 . & \text { (v) } & \text { (i) } & \text { (iii) } & \text { (ii) } \\
\hline 4 . & \text { (v) } & \text { (iv) } & \text { (viii) } & \text { (iii) } \\
\hline
\end{array}
\)
(d)
You cannot copy content of this page