RNA is an abbreviation for ribonucleic acid, it is made up of ribonucleotides which consist of a ribose sugar, phosphoric acid, and nitrogenous bases. Adenine (A), guanine (G), cytosine (C), and uracil (U) are nitrogenous bases . RNA is essential for protein synthesis since it is involved in the transcription, decoding, and translation of genetic information into proteins. RNA does not duplicate itself. When needed, it is synthesised from DNA.

Fill in the gaps in the following table illustrating the differences between prokaryotic and eukaryotic cells. Prokaryotic cell Eukaryotic cell 1 . Size Generally small ( 1 - 10 μ m ) 1 μ m = 10 - 6 m Generally large ( 5 - 100 μ m ). 2 . Nuclear region _____ Well-defined and surrounded by a nuclear membrane. 3 . Chromosome Single More than one chromosome 4 . Cell organelles Membrane-bound cell organelles are absent. _____

Prokaryotic cell Eukaryotic cell Size Generally small ( 1 - 10 μ m ) 1 μ m = 10 - 6 m . Generally large ( 5 - 100 μ m ). Nuclear region In some organisms like bacteria, the nuclear region of the cell maybe poorly defined due to the absence of a nuclear membrane. Such an undefined nuclear region containing only nucleic acids is called nucleoid. Well-defined and surrounded by a nuclear membrane. Chromosome Single More than one chromosome. Cell organelles Membrane-bound cell organelles are absent. Membrane-bound cell organelles [e.g., chloroplasts(exclusively present in plants, algae, etc.), Golgi bodies, mitochondria, etc.] are present.

EASY

Earn 100

What is an RNA?

Important Questions on The Fundamental Unit Of Life

MEDIUM

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Which of the following is not found in prokaryotes except?

EASY

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

All of the following statements about the process of cell divisions are true except one, mark it.

MEDIUM

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Which of the following statement is correct

EASY

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

HARD

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

How is a prokaryotic cell different from a eukaryotic cell?

MEDIUM

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Name the features possessed by plant cells only.

MEDIUM

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Illustrate a plant cell as seen under an electron microscope. How is it different from animal cell?

EASY

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Write any two differences between prokaryotic and eukaryotic cells.

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Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Teacher focused a slide under the objective of a microscope and asked you to identify the prokaryotic cell (a bacterium). Which character/s you will observe in the slide?

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Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Draw a well labelled diagram of typical prokaryotic cell?

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Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Give the difference between a prokaryotic and eukaryotic cell in terms of cell organelles.

Note: The question was modified due to ambiguity.

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Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Find out the false sentences
(i) Cytoplasm is also called protoplasm.
(ii) Mitochondria is the powerhouse of the cell.
(iii) Golgi apparatus is involved with the formation of lysosomes.
(iv) Ribosomes do not help in protein synthesis.
Select the correct option:

MEDIUM

Science>Biology>The Fundamental Unit Of Life>Introduction to Cell

Fill in the gaps in the following table illustrating the differences between prokaryotic and eukaryotic cells.

	Prokaryotic cell	Eukaryotic cell
$1 .$ Size	Generally small ( $1 - 10 μ m$ ) $1 μ m$ $= 10^{- 6} m$	Generally large ( $5 - 100 μ m$ ).
$2 .$ Nuclear region	_____	Well-defined and surrounded by a nuclear membrane.
$3 .$ Chromosome	Single	More than one chromosome
$4 .$ Cell organelles	Membrane-bound cell organelles are absent.	_____