6th Std Science Lesson Wise Questions in English – Part 2

6th Science Lesson 11 Questions in English

11] The Cell

1. Which of the following statement is correct?

1. The cell is the basic structural and functional unit of every living organism
2. The cell is self-sufficient to carry out all the fundamental and essential functions of an organism
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Like a brick wall, your body is composed of basic building blocks, and are named as “Cells”. The cell is the basic structural and functional unit of every living organism. The cell is self-sufficient to carry out all the fundamental and essential functions of an organism.

2. Who built a compound microscope?

1. Robert Hooke
2. Robert Brown
3. William Brown
4. John Oram

Explanation

The Englishman Robert Hooke was a scientist, mathematician, and inventor. He improved microscope which was used in those days, and built a compound microscope.

3. Robert Hooke placed______ beside the microscope to focus the light from an oil-lamp on

specimens to illuminate them brightly.

1. Concave lens
2. Convex Mirror
3. Water lens
4. Concave mirror

Explanation

Robert Hooke placed water-lens beside the microscope to focus the light from an oil-lamp on specimens to illuminate them brightly. So that he able to see the minute parts of the objects clearly.

4. In which book Robert Hooke used the term cell for the first time?

1. Micrographia
2. The Cell
3. Molecular Biology
4. Cell Biology

Explanation

Based on the observations made by him Hooke published a book named Micrographia in the year 1665, where he first used the term Cell. He described the structure of tissue using the term cell.

5. The branch of science that deals with the study of cells is called______

1. Molecular Biology
2. Cell Biology
3. Cellulogy
4. Micrology

Explanation

In Latin the word ‘cellua’ means a small chamber. The branch of science that deals with the study of cells is called ‘Cell Biology’.

6. A typical cell consists of_____ major parts

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

Explanation

A typical cell consists of three major parts:

1. An outer cell membrane.

2. A liquid cytoplasm.

3. A nucleus.

7. Which of the following statement is correct?

1. The size of cells may vary from a Macro-meter (a million of a metre) to a few Centi-meters.
2. Most cells are microscopic and cannot be seen with the naked eye
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

The size of cells may vary from a Micro-meter (a million of a metre) to a few Centi-meters. Most cells are microscopic and cannot be seen with the naked eye. They can be observed only through the Microscope.

8. The size of the bacterial cell ranges from______

1. 0.01 micro meter to 0.5 micro meter
2. 0.1 micro meter to 0.5 micro meter
3. 0.01 micro meter to 0.05 micro meter
4. 0.01 micro meter to 0.1 micro meter

Explanation

Smallest size of the cell is present in Bacteria. The size of the bacterial cell ranges from 0.01 micro meter to 0.5 micro meter.

9. What is the width of largest cell in egg of an ostrich?

1. 170 milli meter
2. 150 milli meter
3. 120 milli meter
4. 17 milli meter

Explanation

On the other-hand the largest cell is the egg of an ostrich with 170 milli meter width. We can see this with the naked eye.

10. What is the longest cell in Human body?

1. nerve cells
2. Red blood cells
3. White blood cells
4. Platelets

Explanation

In Human body the nerve cells are believed to be the longest cells. They can be observed only through the Microscope.

11. Which of the following statement is incorrect?

1. Cell size has relation to the size of an organism.
2. It is not necessary that the cells of, say an elephant be much larger than those of a mouse
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Cell size has no relation to the size of an organism. It is not necessary that the cells of, say an elephant be much larger than those of a mouse.

12. Which of the following organism is unicellular?

1. Bacteria
2. Amoeba
3. Chlamydomonas
4. 1, 2
5. 2, 3
6. 1, 2, 3
7. 1, 3

Explanation

Organisms may be either unicellular (single cell) or multicellular. Organisms such as Bacteria, Amoeba, Chlamydomonas, and Yeast are unicellular.

13. Which of the following organism is not multicellular?

1. Spirogyra
2. Mango
3. Yeast
4. Human

Explanation

Organisms such as Spirogyra, Mango, and Human beings are multicellular. (i.e) made up of a few hundreds to million cells.

14. Approximate number of cells in the human body is______

1. 3.7 X10^13
2. 3.7 X10^16
3. 3.7 X10^19
4. 3.7 X10^10

Explanation

The number of cells present in different organisms may vary. Approximate number of cells in the human body is 3.7 X10^13 or 37,000,000,000,000.

15. Based on Cell size arrange the following in Ascending order?

1. Bacterium Cell
2. Virus
3. Plant Cell
4. 2, 1, 3
5. 3, 2, 1
6. 2, 3, 1
7. 1, 3, 2

Explanation

16. Which of the following is correct statement about cell?

1. Prokaryotic cell has True nucleus consisting of nuclear membrane
2. Eukaryotic cell has No true nucleus consisting of no nuclear membrane
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Generally, cells are classified into two types. First one is Prokaryotic cell. It has No true nucleus consisting of no nuclear membrane. Another one is Eukaryotic cell. It has True nucleus consisting of nuclear membrane.

17. Which of the following is an example Prokaryotic cells?

1. Bacteria
2. Plants
3. Fungi
4. Algae

Explanation

The unicellular organisms like Bacteria has Prokaryotic cells. It has No true nucleus. This type of nucleus is called as nucleoid. No nuclear membrane is around this nucleoid.

18. Which of the is the 1^st life form on earth?

1. Fungi
2. Virus
3. Bacteria
4. Algae

Explanation

Bacterial cells were the first form of life on earth. It is ranging from 0.003 to 2.0 micro meter in diameter. Eg. Eschericia coil bacteria.

19. Which of the following is an example of Eukaryotic cell?

1. Plants
2. Animals
3. Most of the fungi
4. All the above

Explanation

Cells which has true nucleus is called as eukaryotic cell. It is bigger than prokaryotic cells. It’s organelles bounded by membrane. Ex. Plants, animals, most of the fungi and algae.

20. Which of the following is correctly matched?

1. Prokaryotic cell – diameter ranges from 1 to 2 micron
2. Eukaryotic cell – diameter ranges from 10 t0 100 micron
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

21. Which of the following statement is correct?

1. Both plant and animals are made up of cells.
2. Both cells are eukaryotic in nature, having a well defined membrane – bound nucleus
3. 1 alone
4. 2 alone
5. 1, 2
6. None

Explanation

Both plant and animals are made up of cells. Both cells are eukaryotic in nature, having a well defined membrane – bound nucleus.

22. Which of the following is/are the features of plant cell?

1. larger in size
2. hard in nature
3. Centrioles are absent.
4. 1, 2
5. 2, 3
6. 1 alone
7. 1, 2, 3

Explanation

Plant cell

* It is usually larger in size. It is hard in nature. * Plant cell have a cell wall in addition to their cell membrane. * Plant cell have chloroplast which contain chlorophyll * Plant cells have large vacuoles. Centrioles are absent.

23. Which of the following is/are the feature of animal cell?

1. Cell wall is absent
2. Chloroplast is usually present
3. Animal cells are generally smaller than plant cells
4. 1 alone
5. 1, 3
6. 1, 2
7. 1, 2, 3

Explanation

Animal cell * Animal cells are generally smaller than plant cells. It is not so hard as plant cell. * A cell wall is absent. * Chloroplast is usually absent. * An animal cell may have many small vacuoles. * Centrioles are found in animal cells.

24. What is the function of Cell wall?

1. protects the cell
2. Produce energy for the cell
3. Store food
4. All the above

Explanation

Cell wall Surrounds and protects the cell, Make the cell stiff and strong. It has the special name as Supporter and protector.

25. What is the special name for Cell membrane?

1. Supporter and protector
2. Gate of the cell
3. Area of movement
4. Power house of the cell

Explanation

Cell membrane Holds and protects the cell, Controls the movement of materials in and out of the cell. It has a special name as Gate of the cell.

26. ______ is a gel-like material in which cell parts move

1. Cytoplasm
2. Cell membrane
3. Mitochondria
4. Vacuoles

Explanation

Cytoplasm is a watery, gel-like material in which cell parts move. It is also called as Area of movement.

27. Which of the following is called as Power house of the cell?

1. Cytoplasm
2. Mitochondria
3. Chloroplasts
4. Nucleus

Explanation

Mitochondria Produce and supply most of the energy for the cell. It is called as Power house of the cell.

28._______ Capture the energy of sunlight and use it to produce food for the cell by Photosynthesis

1. Cytoplasm
2. Mitochondria
3. Chloroplast
4. Vacuoles

Explanation

Chloroplasts Contain green pigment chlorophyll and Capture the energy of sunlight and use it to produce food for the cell by photosynthesis. It is called as Food producers for the cell (Plant cell).

29. Vacuoles are called as_________

1. Storage tanks
2. Control centre
3. Gate of the nucleus
4. Power house of the cell

Explanation

Vacuoles Store food, water, and chemicals. It has a special name called as Storage tanks. IT is scattered over the cytoplasm.

30.______ acts the brain of cell.

1. Nucleus
2. Vacuoles
3. Cytoplasm
4. Mitochondria

Explanation

Nucleus acts as ‘brain’ of the cell. It Regulates and controls all the cell activities. It is also called as Control centre.

31. Which of the following is the gateway of Nucleus?

1. Nuclear membrane
2. Cytoplasm
3. Mitochondria
4. Protoplasm

Explanation

Nucleus membrane Surrounds and protects the nucleus control the movement of materials in and out of the nucleus. It is the Gate of the nucleus.