Human Body PART 01 (I) Digestive System. Study the figure given below carefully. Which option is correct regarding the non-appearance of blue colour in test tube B?
Understand the Problem
প্রশ্নটি মানবদেহের হজম প্রণালী সংক্রান্ত কিছু ভিন্ন ধরণের প্রশ্ন জিজ্ঞাসা করছে, যা পরীক্ষার প্রস্তুতির জন্য। এটি বিভিন্ন প্রতিক্রিয়া ও সাধারণ তথ্য যাচাই করার জন্য।
Answer
Presence of salivary amylase in test tube B.
Due to the presence of salivary amylase in test tube B which breaks down starch into maltose, preventing the blue-black color change with iodine.
Answer for screen readers
Due to the presence of salivary amylase in test tube B which breaks down starch into maltose, preventing the blue-black color change with iodine.
More Information
Blue color appears in the presence of iodine only if starch is intact. Salivary amylase breaks down starch, so no blue color develops in test tube B.
Tips
Ensure to test for starch only under conditions where no enzyme is actively breaking it down.
Sources
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