Cells

Q.

Question 28
Living cells were discovered by

(a) Robert Hooke
(b) Purkinje
(c) Leeuwenhoek
(d) Robert Brown

Q.

A cell is called the basic unit of life. Why?

1. Cell is basic in nature

2. All of the above

3. Cell is the smallest living entity which can survive on its own

4. Cell does not have any smaller parts within itself

Q. Robert Hooke discovered the nucleus.

1. True
2. False

Q.

The term ‘cell’ was first coined by ____________ ( Robert Hooke / Leeuwenhoek ).

Q. Robert Hooke discovered the ___ of a cell

1. cell membrane
2. Nucleus
3. Cell wall
4. cytoplasm

Q. (a) What would happen if animals have cell wall?

(b) Why cell organelles are not considered as structural and functional unit of cell?

Q. Which is the largest cell in the world ?

1. ostrich egg
2. elephant cell
3. none of these
4. snake egg

Q. The cell membrane is called selectively permeable. Why ?

Q. I am like a policeman. Who am I ________?

[Review question: Pg. No: 66]

Q.

Kidney-shaped cells that surround the stoma are called guard cells.

1. True

2. False

Q.

Question 28
Living cells were discovered by

(a) Robert Hooke
(b) Purkinje
(c) Leeuwenhoek
(d) Robert Brown

Q. A cell is considered to be a fundamental unit of life because___________________

1. It has various organelles.
2. An organism is made up of cells.
3. It is the smallest structure that exhibits growth, metabolism, self regulation and self duplication.
4. No smaller unit has yet been tested by scientists so far.

Q. Which of the following organisms/cells do not have cell wall?

निम्नलिखित में से किन जीवों/कोशिकाओं में कोशिका भित्ति नहीं होती है?

(a) Tradescantia leaf cell

ट्राडेस्केंशिया पत्ती की कोशिका

(b) Onion cell

प्याज की कोशिका

(c) Paramecium

पैरामीशियम

(d) Human cheek cell

मानव गाल की कोशिका

1. (a) and (b)
   
   (a) व (b)
2. (b) and (c)
   
   (b) व (c)
3. (c) and (d)
   
   (c) व (d)
4. (a) and (d)
   
   (a) व (d)

Q. The __________ is the structural and functional unit of all living things.

Q. Write a detail note on prokaryotic cell and eukaryotic cell with examples.

Q. Name the scientist who coined the term "cell". How many lenses did he use in his microscope. What did he observe under his microscope?
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Review Questions - Pg No.38 - LAT - 1]

Q. A group of similar cells that are specialised to perform a specific function is called a___

Q. Very Short Answer Type Questions :
Who coined the term niche and in which year?

Q.

Answer the following questions in short:
Name the biggest cell.

Q. Assertion :Larger cells are less efficient. Reason: Surface to volume ratio is more in large cells.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Why are lysosomes are known as suicide bags of cell

Q. The unit of measurement used for expressing dimension (size) of cell is ___________

[Review question: Pg. No: 66]

Q. The basic living structure of an organism is an organ.

1. True
2. False

Q. The _____ is the smallest unit of all living things.

1. organ system
2. organ
3. cell
4. tissue

Q. Who coined term cell

Q.

Who is the 'Father of Microbiology'?

1. Robert Hooke

2. Anton-Van-Leeuwenhoek

3. M.J Schleiden

4. Robert Brown

Q. Which of the following are functions of chlorophyll?

1. Storing starch and fats
2. Storing water and minerals
3. Performing photosynthesis
4. Providing green colour to plants

Q. The unit of measurement used for expressing dimension (size) of cell is ___________

[Review question: Pg. No: 66]

Q. Cellular totipotency was for the first time demonstrated by

1. F. C. Steward
2. P. Maheshwari
3. W. H. Muir
4. Y. P. S. Bajaj

Q. Which of the following cell size can be measured in metres?

1. Mycoplasma
2. Nerve