Question:

Write the important structural and functional differences between DNA and RNA.

CBSE CLASS XII

Updated On: Sep 27, 2023

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Questions Asked in CBSE CLASS XII exam

Shweta mixed two liquids A and B of 10 mL each. After mixing, the volume of the solution was found to be 20.2 mL.
(i) Why was there a volume change after mixing the liquids?
(ii) Will there be an increase or decrease of temperature after mixing?
(iii) Give one example for this type of solution.
- CBSE CLASS XII - 2025
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On $31^{\text {st }}$ March, 2024, following is the Balance Sheet of Bhavik Limited :

Bhavik Ltd.

Balance Sheet as at $31^{\text {st }}$ March 2024

I. Equity and Liabilities :

Particulars	Note No.	$31-3-2024$ (₹)	$31-3-2023$ (₹)
1. Shareholders funds
(a) Share Capital		12,00,000	10,00,000
(b) Reserves and Surplus	1	4,00,000	3,00,000
2. Non-current liabilities
Long-term borrowings	2	6,00,000	10,00,000
3. Current Liabilities		5,00,000	1,00,000
(a) Trade Payables	3	3,00,000	4,00,000
(b) Short-term provisions
Total		30,00,000	28,00,000

II. Assets :

1. Non-current Assets
(a) Property, Plant and Equipment and Intangible Assets
Property plant and equipment	4	19,00,000	15,00,000
(b) Non-current Investments		3,00,000	4,00,000
2. Current Assets
(a) Inventories		4,50,000	3,50,000
(b) Trade Receivables		2,50,000	4,50,000
(c) Cash and Cash Equivalents		1,00,000	1,00,000
Total		30,00,000	28,00,000

Notes to Accounts :

Note	Particulars	$31-3-2024$ (₹)	$31-3-2023$ (₹)
No.
1.	Reserves and Surplus i.e. Balance in Statement of Profit and Loss	4,00,000	3,00,000
2.	Long-term borrowings
	10% Debentures	6,00,000	10,00,000
3.	Short-term provisions
	Provision for tax	3,00,000	4,00,000
4.	Property plant and equipment
	Plant and Machinery	21,50,000	16,00,000
	Less : Accumulated Depreciation	2,50,000	1,00,000
	19,00,000	15,00,000

Additional Information :

During the year, a piece of machinery costing ₹ 8,00,000 with accumulated depreciation of ₹ 50,000 was sold for ₹ 6,50,000.
Debentures were redeemed on $31^{\text {st }}$ March, 2024.

Calculate :

Cash flows from Investing Activities
Cash flows from Financing Activities

CBSE CLASS XII - 2025
Balance sheet statement

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Concepts Used:

Nucleic acids

Nucleic acids are explained as long-chain polymeric molecules, where the monomer (the repeating unit) is referred to as the nucleotides. Thus many times nucleic acids are referred to as polynucleotides. The two main kinds of nucleic acids are-

Deoxyribonucleic Acid (DNA)

Chemically, DNA is a composition of a pentose sugar, phosphoric acid, and some cyclic bases that have nitrogen in them. DNA has β-D-2-deoxyribose in it, in the form of the sugar moiety.

Ribonucleic Acid (RNA)

The RNA molecule is a composition of phosphoric acid, a pentose sugar, and some cyclic bases containing nitrogen. The sugar moiety inside RNA molecules is β-D-ribose.