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Biology · 2024 · 2 marks
CBSE 2024 · Region 1 · Set 3 · Q20
(a) Different varieties of cheese are known by their characteristic texture, flavour and taste, the specificity coming from the microbes used.…
Different varieties of cheese are known by their characteristic texture, flavour and taste, the specificity coming from the microbes used. Support this statement with the help of two suitable examples.
Identify A, B, C and D in the following table :
| Scientific name of source plant | Drug | Harmful effects / Body part affected | |
| 1. | Papaver somniferum | A | Depressant/slows down body functions |
| 2. | Cannabis sativa | B | C |
| 3. | Erythroxylum coca | Cocaine | D |
Marking-scheme solution
(a)
Swiss cheese , large holes in swiss cheese are due to large amount of CO2
produced by Propionibacterium sharmanii.
Roquefort cheese , Ripened by growing specific fungi on them, which give them a particular flavour
OR
(b)
A –Opioid / Heroin /Smack ,
B – Cannabinoids / Marijuana / Hashish / Charas / Ganja ,
C – Affect Cardiovascular system,
D –Interfere transport of neurotransmitter Dopamine / Euphoria / increased , energy / hallucinations /Potent stimulating action on CNS
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.