O Level Biology Quiz Questions and Answers PDF - 125

MCQ 621: Blue black color is produced when substance containing starch is mixed with

1. Biuret solution
2. benedict solution
3. iodine
4. alcohol

MCQ 622: When the growth of fungal cells slows down in culture medium

1. carbon dioxide is given off
2. carbon monoxide is given off
3. fungal cells excrete penicillin
4. the process is stopped

MCQ 623: Response to external environment that is beneficial to the organism is termed as

1. sensitivity
2. stability
3. sustenance
4. similarity

MCQ 624: Tissue cells like cartilage may not have a direct contact with

1. blood arteries
2. blood veins
3. tissue fluid
4. blood capillaries

MCQ 625: To form cheese, a mixture of bacteria and fungi act upon

1. fermented milk sugar
2. lactic acid
3. fats
4. all of above