Explain how cyanobacteria can be used as bio-fertilizer.
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Top Questions on Microbes in human welfare
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Bone marrow and thymus play an important role in human immune system. Explain how are they able to achieve this. \begin{center} OR \end{center} (B)
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Why are baculoviruses used as biological control agents?- CBSE CLASS XII - 2025
- Biology
- Microbes in human welfare
- Name an alcoholic drink which is produced with the help of microbes:
(1) With distillation
(2) Without distillation- CBSE CLASS XII - 2025
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- Match the items in Column-A with that of Column-B:
- CBSE CLASS XII - 2025
- Biology
- Microbes in human welfare
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Reason (R): Characteristic texture, flavour and taste of cheese is specific to microorganism.
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Questions Asked in CBSE CLASS XII exam
Bittu and Chintu were partners in a firm sharing profit and losses in the ratio of 4 : 3. Their Balance Sheet as at 31st March, 2024 was as follows:
On 1st April, 2024, Diya was admitted in the firm for \( \frac{1}{7} \)th share in the profits on the following terms:- (i) New profit sharing ratio between Bittu, Chintu and Diya was 3 : 3 : 1 .
- (ii) Fixed Assets were found to be overvalued by ₹ 1,40,000.
- (iii) Creditors were paid ₹ 4,20,000 in full settlement.
- (iv) Diya brought proportionate capital and ₹ 5,60,000 as her share of goodwill premium by cheque.
Prepare Revaluation Account and Partners' Capital Accounts.
- CBSE CLASS XII - 2025
- Partnership Accounts
- Using a Punnett square, work out the distribution of an autosomal phenotypic feature in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.
- CBSE CLASS XII - 2025
- Principles of Mendelian inheritance
- A charge \( -6 \mu C \) is placed at the center B of a semicircle of radius 5 cm, as shown in the figure. An equal and opposite charge is placed at point D at a distance of 10 cm from B. A charge \( +5 \mu C \) is moved from point ‘C’ to point ‘A’ along the circumference. Calculate the work done on the charge.
- CBSE CLASS XII - 2025
- Electrostatics
Rupal, Shanu and Trisha were partners in a firm sharing profits and losses in the ratio of 4:3:1. Their Balance Sheet as at 31st March, 2024 was as follows:
(i) Trisha's share of profit was entirely taken by Shanu.
(ii) Fixed assets were found to be undervalued by Rs 2,40,000.
(iii) Stock was revalued at Rs 2,00,000.
(iv) Goodwill of the firm was valued at Rs 8,00,000 on Trisha's retirement.
(v) The total capital of the new firm was fixed at Rs 16,00,000 which was adjusted according to the new profit sharing ratio of the partners. For this necessary cash was paid off or brought in by the partners as the case may be.
Prepare Revaluation Account and Partners' Capital Accounts.- CBSE CLASS XII - 2025
- Partnership Accounts
- Kajal and Laura were partners in a firm sharing profits and losses in the ratio of 5:3. They admitted Maddy for \( \frac{1}{4} \)th share in future profits. Maddy brought Rs 8,00,000 as his capital and Rs 4,00,000 as his share of premium for goodwill. Kajal, Laura and Maddy decided to share profits in future in the ratio of 2:1:1. After all adjustments in respect of goodwill, revaluation of assets and liabilities etc. Kajal's capital was Rs 15,00,000 and Laura's capital was Rs 8,00,000. It was agreed that partners' capitals should be in proportion to their new profit sharing ratio taking Maddy's capital as base. The adjustment was made by bringing in or withdrawing the necessary cash as the case may be. The cash brought in by Kajal was:
- CBSE CLASS XII - 2025
- Partnership