Discovery of Cell

Q.

Who gave the cell theory?

Q.

Define cell range in Ms excel.

Q.

Robert Hooke was the first person who saw cells using a microscope. Which among the following options is/are true about his observation?

1. Carl Linnaeus

2. Antonie van Leeuwenhoek

3. Louis Pasteur

4. Robert Hooke

Q.

How does temperature affect the emf of a cell?

Q.

Match the discoveries with the scientist who have made it

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{a. Antonie van Leeuwenhoek}& \text{i. All animals are made of cells}\\ \text{b. Robert Hooke}& \text{ii. Laid the foundation for microbiology}\\ \text{c. Theodor Schwann}& \text{iii. Coined the term cell}\\ \text{d. Matthias Schleiden}& \text{iv. All plants are made of cells}\end{array}$

1. a - ii, b - iii, c - i, d - iv
2. a - ii, b - i, c - iv, d - iii
3. a - iii, b - i, c - iv, d - ii
4. a - iii, b - ii, c - iv, d - i

Q. What is the magnification possible in an electron microscope ?

Q.

Which of the following can be used to see atoms?

1. Scanning tunneling microscope

2. Compound Microscope

3. Stereo Microscope

4. Confocal Microscope

Q. Name the instrument used for observing cells.

1. Telescope
2. Microscope
3. Periscope
4. Kaleidoscope

Q.

Name the book published by Robert Hooke.

Q. Robert Hooke was the first person who saw cells using a microscope. Which among the following options is/are true about his observation?

1. He observed the cork cells dividing.
2. He observed organelles like chloroplasts and mitochondria in cork cells.
3. He observed the dead cells of cork.
4. He discovered the nucleus in the cell.

Q.

Who isolated DNA for the first time from the pus cells?

Q.

*Who gave cell theory?

Q. Which of the following statements is correct regarding phase microscopy?

1. Used for the study of living cells.
2. Related to retardation and to the thickness of the object.
3. Based on the scattering of light and uses a dark field condenser.
4. The best method for studying non living ultrastructures.

Q. We are able to see minute things that we cannot see with our naked eyes through

1. Telescope
2. Microscope
3. Sniper Scope
4. None of the above

Q. What are the types of microscope used in universities or research labs ?

Q. The living cell was first identified by .

1. Robert Hooke
2. Leeuwenhoek
3. Robert Brown
4. Galileo

Q. Separating of chromatids during metaphase and behaviour of chromosomes during mitotic and meiotic divisions can be best studied by

1. Phase contrast microscope
2. SEM
3. Cell fractionation method
4. X-ray microscope

Q. Zernike was awarded Noble prize for the discovery of

1. TEM
2. SEM
3. Fluorescent microscope
4. Phase contrast microscope

Q. Phase contrast microscope is

1. Based on the scattering of light and using a dark field condenser.
2. Used for the study of living cells.
3. Related to retardation and thickness of object.
4. The best method for studying non-living ultra structure.

Q. The transmission electron microscope has a resolution of

1. 2, 000 nanometre
2. 200 nanometre
3. 2 nanometre
4. 0.2 nanometre

Q. High wavelength UV rays are used in

1. Fluorescent microscope.
2. Polarising microscope.
3. Ultraviolet microscope.
4. Phase-contrast microscope.

Q. To study the living cells without staining, which of the following microscopes can be used?

1. Flourescent
2. SEM
3. Phase contrast
4. TEM

Q.

What does the image depicts? [3 MARKS]

Define cell. Who gave the cell theory?

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

1. 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.
2. Resolution power of electron microscope is much higher than that of light microscope.
3. Electron beam can pass through thick materials whereas light microscopy requires thin sections.
4. Resolution power of electron microscope is $200-350nm$ as compared to $0.1-02nm$ for the light microscope.

Q. Which microscope is best to study cell division in functional state?

1. EM
2. SEM
3. Phase contrast microscope
4. Simple microscope

Q. The part of a cell that can be seen with an electron microscope, but cannot with a light microscope is/are

1. Nucleus
2. Golgi bodies
3. Chloroplasts
4. Membrane separating the nucleus from the cytoplasm

Q. Lenses used in ultraviolet microscope are

1. Quartz fluorite.
2. Lithium fluoride.
3. Both B and C.
4. Glass lenses.

Q. Which one of the following microscopes can be used for studying unstained and dividing cells?

1. Electron microscope
2. Polarising microscope
3. Phase-contrast microscope
4. All the above

Q. A living cell is to be studied without staining. A microcsope that can be used for this is

1. Phase contrast microscope
2. TEM
3. SEM
4. Fluorescent microscope

Q. The chromosome separation during metaphase can studied by

1. Phase contrast microscope
2. Microscope
3. X-ray technique
4. Light microscope