Introduction to Cell

Q.

Resolving power of microscope depends upon

1. wavelength of light used (directly proportional)

2. wavelength of light used (inversely proportional)

3. frequency of light used

4. focal length of objective

Q. is known as the 'Father of microbiology'.

1. Matthias Schleidan
2. Anton Leeuwenhoek
3. Robert Hooke
4. Robert Brown

Q. A major breakthrough in the studies of cells came with the development of electron microscope. This is because __________.

1. The resolution power of the electron microscope is much higher than that of the light microscope
2. The resolving power of the electron microscope is 200-350 nm as compared to 0.1-0.2 nm for the light microscope
3. Electron beam can pass through thick materials, whereas light microscopy requires thin sections
4. The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons

Q. ‘Protoplasm is the physical basis of life’ was stated by

1. Linnaeus
2. R. H. Whittaker
3. Robert Hooke
4. Huxley

Q. Robert Hooke observed

1. living cells
2. dead cells
3. enucleated cells
4. both b and c

Q. How many structures are membranous?
Mitochondria, Chloroplast, Nucleus, Lysosome, Ribosome and Centrioles.

1. 2
2. 3
3. 4
4. 5

Q. Which of the following statement(s) is/are correct?
I. Unicellular organisms are incapable of independent existence.
II. Unicellular organisms cannot perform the essential functions of life.
III. Anything less than a complete structure of a cell does not ensure independent living.
IV. Cell is the fundamental structural and functional unit of all living organisms.

1. I and II
2. II and III
3. III and IV
4. IV and II

Q. Which of the following is incapable of independent existence?

1. Bacteria
2. Mycoplasma
3. Virus
4. Both b and c

Q.

Which of the following occupies maximum volume inside a eukaryotic cell?

1. Cytosol

2. Cytoplasm

3. Nucleus

4. Mitochondria

Q. Which of these is considered to be alive?

1. Cell
2. Human
3. Proteins
4. Cytoplasm

Q. All cells have membrane bound organelles.

1. True
2. False

Q. Cellular organelles with membranes are:

1. Lysosomes, Golgi apparatus and mitochondria
2. Nuclei, ribosomes and mitochondria
3. Chromosomes, ribosomes and endoplasmic reticulum
4. Endoplasmic reticulum, ribosomes and nuclei

Q. Which of these is not a shape of bacteria?

1. Rod
2. Spiral
3. Square
4. Triangle

Q. In which material did Robert Hooke discover cells for the first time

1. Leaves
2. Fruits
3. Insects
4. Cork

Q.

Consider the following characteristics:

i) Highly organized

ii) Display homeostasis

iii) Reproduce

iv) Take energy from the environment and transform it

Which of the character(s) is/are common to a cell and a vacuum cleaner?

1. None of the above

2. All of the above

3. i and iv only

4. i only

Q. ‘Protoplasm is the physical basis of life’ was stated by

1. Linnaeus
2. R. H. Whittaker
3. Robert Hooke
4. Huxley

Q. E.coli cells with a mutated Z gene of the lac operon can not grow in medium containing only lactose as the source of energy because:

1. The Lac operon is constitutively active in these cells.
2. In the presence of glucose, E.coli cells do not utilise lactose.
3. They cannot synthesise functional β-galactosidase.
4. They cannot transport lactose from the medium into the cell.

Q. What is the basic unit of life?

1. Lipid
2. Protein
3. DNA
4. Cell

Q.

The term 'Cell' was coined by _____.

1. Robert Brown

2. Robert Hooke

3. Robert Koch

4. Robert Edwards

Q. A student wishes to study the cell structure under a light microscope having $10\times$ eyepiece and $45\times$ objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution:

1. Red
2. Green
3. Yellow
4. Blue

Q. Robert Hooke termed the compartments in the piece of cork as "cell" based on

1. Student rooms
2. Nun's rooms
3. Monk's rooms
4. Teacher's rooms

Q.

Which among the following is the most compelling evidence that all present day cells have common ancestry?

1. The genes which are absolutely necessary for life have not changed much and are preserved

2. Life has not originated on earth and has come from some other planet

3. All proteins are built from the same set of 20 amino acids

4. All the cells have same type of plasma membrane with exactly similar proteins embedded in them