Cell: The Unit of Life

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

1. Nucleolus
2. Kinetochore
3. Centrosome
4. Chromatin

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

1. Lysosomes
2. Centrosomes
3. Mitochondria
4. Ribosomes

Select the correct statements regarding cell membrane in eukaryotic cell. Choose the correct answer from the options given below:

1. C, D and E only
2. B, C and E only
3. A, B and D only
4. A, C and E only

Choose the correct statements regarding cell organelles and their inclusions. Choose the correct answer from the options given below:

1. A, B and C only
2. C, D and E only
3. A and B only
4. B, C and D only

Mitochondrial inner membrane encloses .

1. aqueous humor
2. matrix
3. cytosol
4. mucus

Cell theory was formulated by .

1. Antonie Von Leeuwenhoek
2. Schleiden and Schwann
3. Robert Brown
4. Singer and Nicolson

The plastid that stores xanthophyll is known as .

1. amyloplast
2. chloroplast
3. chromoplast
4. aleuroplast

Smooth endoplasmic reticulum .

1. is a site for the synthesis of carbohydrates
2. has ribosomes attached to its surface
3. is the major site for the synthesis of lipids
4. is actively involved in protein synthesis

Which of the following are characteristics of prokaryotic cells?

1. (A), (B) and (C) only
2. (B) and (C) only
3. (A) and (C) only
4. (A), (C) and (D) only

Endomembrane system includes .

1. Golgi complex, chloroplast, peroxisomes and vacuole
2. endoplasmic reticulum, Golgi complex, lysosomes and vacuole
3. endoplasmic reticulum, chloroplast, peroxisomes and vacuole
4. mitochondria, chloroplast, peroxisomes and vacuole

Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below :

1. A is true but R is false
2. A is false but R is true
3. Both A and R are true and R is the correct explanation of A
4. Both A and R are true but R is not the correct explanation of A

From the statements given below choose the correct option :

1. A, B, E are true
2. B, D, E are true
3. A, B, C are true
4. A, B, D are true

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

1. Cristae
2. Endoplasmic Reticulum
3. Mesosome
4. Chromatophores

The DNA present in chloroplast is:

1. Linear, double stranded
2. Circular, double stranded
3. Linear, single stranded
4. Circular, single stranded

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

1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.

Mesosome in a cell is a :

1. Membrane bound vesicular structure
2. Chain of many ribosomes attached to a single mRNA
3. Special structure formed by extension of plasma membrane
4. Medium sized chromosome

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below.

1. Statement I is true but Statement II is false.
2. Statement I is false but Statement II is true.
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Which of the following are NOT considered as the part of endomembrane system? Choose the most appropriate answer from the options given below:

1. A, C and E only
2. A and D only
3. A, D and E only
4. B and D only

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

1. Protein synthesis
2. Motility
3. Transportation
4. Nuclear division

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

1. RER has ribosomes attached to ER
2. SER is devoid of ribosomes
3. Only RER are present in prokaryotes
4. SER are the sites for lipid synthesis

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

1. Substance soluble in lipids
2. Substance with hydrophobic moiety
3. Substance with hydrophilic moiety
4. All substances irrespective of hydrophobic and hydrophilic moiety

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

1. Lysosomal enzymes will be more active
2. Hydrolytic enzymes will function more efficiently
3. Hydrolytic enzymes will become inactive
4. Lysosomal enzymes will be released into the cytoplasm

Pathogenic bacteria gain resistance to antibiotics due to changes in their :

1. Nucleoid
2. Cosmids
3. Plasmids
4. Nucleus

Which of the following is an incorrect statement?

1. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm
2. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles
3. Microbodies are present both in plant and animal cells
4. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm

When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :

1. Acrocentric
2. Metacentric
3. Telocentric
4. Sub-metacentric

The organelles that are included in the endomembrane system are

1. Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes
2. Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
3. Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles
4. Golgi complex, Mitochondria, Ribosomes and Lysosomes

Which of the following statements about inclusion bodies is incorrect?

1. These are involved in ingestion of food particles
2. They lie free in the cytoplasm
3. These represent reserve material in cytoplasm
4. They are not bound by any membrane

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

1. Peroxisomes
2. Golgi bodies
3. Polysomes
4. Endoplasmic reticulum

Which of the following pair of organelles does not contain DNA?

1. Lysosomes and Vacuoles
2. Nuclear envelope and Mitochondria
3. Mitochondria and Lysosomes
4. Chloroplast and Vacuoles

Which of the following statements regarding mitochondria is incorrect?

1. Inner membrane is convoluted with infoldings
2. Mitochondrial matrix contains single circular DNA molecule and ribosomes
3. Outer membrane is permeable to monomers of carbohydrates, fats and proteins
4. Enzymes of electron transport are embedded in outer membrane