Protein và enzyme - trung bình

Home Lớp 12 Hoá học Lớp 12 - Sách KNTT Bài 10: Protein và enzymeBài tập trung bình

{"common":{"save":0,"post_id":"10158","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9217","post_id":"10158","mon_id":"1160346","chapter_id":"1160215","question":"Khi n\u1ea5u canh cua thì th\u1ea5y các m\u1ea3ng “riêu cua” n\u1ed5i lên là<\/p>","options":["A. s\u1ef1 \u0111ông t\u1ee5 c\u1ee7a protein do nhi\u1ec7t \u0111\u1ed9.","B. s\u1ef1 \u0111ông t\u1ee5 c\u1ee7a lipid.","C. ph\u1ea3n \u1ee9ng màu c\u1ee7a protein.","D. ph\u1ea3n \u1ee9ng thu\u1ef7 phân c\u1ee7a protein."],"correct":"1","level":"2","hint":"G\u1ee3i ý: Khi \u0111un nóng, m\u1ed9t s\u1ed1 ch\u1ea5t trong th\u1ecbt cua s\u1ebd b\u1ecb bi\u1ebfn tính t\u1ea1o thành m\u1ea3ng n\u1ed5i trên m\u1eb7t n\u01b0\u1edbc.<\/p>","answer":"\u0110áp án \u0111úng: A. s\u1ef1 \u0111ông t\u1ee5 c\u1ee7a protein do nhi\u1ec7t \u0111\u1ed9.<\/span><\/strong><\/p>Gi\u1ea3i thích:<\/strong> Khi n\u1ea5u canh cua, protein trong th\u1ecbt cua b\u1ecb bi\u1ebfn tính và \u0111ông t\u1ee5 l\u1ea1i d\u01b0\u1edbi tác d\u1ee5ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9, t\u1ea1o thành các m\u1ea3ng “riêu cua” n\u1ed5i lên trên m\u1eb7t n\u01b0\u1edbc.<\/p>B sai: Lipid (ch\u1ea5t béo) không b\u1ecb \u0111ông t\u1ee5 \u1edf nhi\u1ec7t \u0111\u1ed9 n\u1ea5u canh, mà ch\u1ec9 tan ch\u1ea3y. C sai: Ph\u1ea3n \u1ee9ng màu c\u1ee7a protein ch\u1ec9 x\u1ea3y ra khi tác d\u1ee5ng v\u1edbi thu\u1ed1c th\u1eed, không ph\u1ea3i khi \u0111un nóng. D sai: Th\u1ee7y phân protein t\u1ea1o amino axit, không làm xu\u1ea5t hi\u1ec7n m\u1ea3ng “riêu cua” nh\u01b0 hi\u1ec7n t\u01b0\u1ee3ng quan sát \u0111\u01b0\u1ee3c.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-11-01 14:30:47","option_type":"txt","len":2},{"id":"9218","post_id":"10158","mon_id":"1160346","chapter_id":"1160215","question":"Khi nói v\u1ec1 peptide và protein, phát bi\u1ec3u nào sau \u0111ây sai?<\/p>","options":["A. Liên k\u1ebft c\u1ee7a nhóm –CO– v\u1edbi nhóm –NH– gi\u1eefa hai \u0111\u01a1n v\u1ecb α–amino acid \u0111\u01b0\u1ee3c g\u1ecdi là liên k\u1ebft peptide.","B. T\u1ea5t c\u1ea3 các protein \u0111\u1ec1u tan trong n\u01b0\u1edbc t\u1ea1o thành dung d\u1ecbch keo.","C. Protein có ph\u1ea3n \u1ee9ng màu biuret v\u1edbi Cu(OH)\u2082.","D. Th\u1ee7y phân hoàn toàn protein \u0111\u01a1n gi\u1ea3n b\u1eb1ng enzyme thu \u0111\u01b0\u1ee3c các α–amino acid."],"correct":"2","level":"2","hint":"G\u1ee3i ý: Hãy nh\u1edb r\u1eb1ng không ph\u1ea3i m\u1ecdi lo\u1ea1i protein<\/strong> \u0111\u1ec1u tan t\u1ed1t trong n\u01b0\u1edbc nhé.<\/p>","answer":"\u0110áp án \u0111úng: B. T\u1ea5t c\u1ea3 các protein \u0111\u1ec1u tan trong n\u01b0\u1edbc t\u1ea1o thành dung d\u1ecbch keo.<\/span><\/strong><\/p>Gi\u1ea3i thích:<\/strong> Phát bi\u1ec3u B sai vì không ph\u1ea3i t\u1ea5t c\u1ea3 protein \u0111\u1ec1u tan trong n\u01b0\u1edbc<\/strong>. Ch\u1ec9 có m\u1ed9t s\u1ed1 protein nh\u01b0 albumin, globulin<\/strong> m\u1edbi tan; còn nh\u1eefng protein nh\u01b0 keratin (trong tóc, móng)<\/strong> hay fibroin (trong t\u01a1 t\u1eb1m)<\/strong> thì không tan trong n\u01b0\u1edbc.<\/p>A \u0111úng: Liên k\u1ebft gi\u1eefa nhóm –CO– và –NH– c\u1ee7a hai amino acid chính là liên k\u1ebft peptide<\/strong>. C \u0111úng: Protein có ph\u1ea3n \u1ee9ng màu biuret<\/strong> v\u1edbi Cu(OH)\u2082 cho màu tím<\/strong> \u0111\u1eb7c tr\u01b0ng. D \u0111úng: Khi th\u1ee7y phân hoàn toàn protein \u0111\u01a1n gi\u1ea3n<\/strong>, s\u1ea3n ph\u1ea9m thu \u0111\u01b0\u1ee3c là các α–amino acid<\/strong>.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-11-01 14:37:05","option_type":"txt","len":3},{"id":"9219","post_id":"10158","mon_id":"1160346","chapter_id":"1160215","question":"Thu\u1ef7 phân 1250 gam protein X thu \u0111\u01b0\u1ee3c 425 gam alanine. N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng phân t\u1eed trung bình c\u1ee7a X là 100000 amu thì s\u1ed1 m\u1eaft xích trung bình alanine có trong phân t\u1eed X là<\/p>","options":["A. 453.","B. 382.","C. 328.","D. 479."],"correct":"3","level":"2","hint":"G\u1ee3i ý: Mu\u1ed1n bi\u1ebft có bao nhiêu m\u1eaft xích alanine, em hãy tính t\u1ec9 l\u1ec7 s\u1ed1 mol alanine thu \u0111\u01b0\u1ee3c so v\u1edbi s\u1ed1 mol protein ban \u0111\u1ea7u nhé.<\/p>","answer":"\u0110áp án \u0111úng: C. 328.<\/span><\/strong><\/p>Gi\u1ea3i thích:<\/strong><\/p><ul data-end=\"529\" data-start=\"174\"> <li data-end=\"278\" data-start=\"174\">Kh\u1ed1i l\u01b0\u1ee3ng mol trung bình c\u1ee7a protein X: 100000 g\/mol → S\u1ed1 mol protein: 1250 \/ 100000 = 0,0125 mol<\/p><\/li> <li data-end=\"359\" data-start=\"279\">Kh\u1ed1i l\u01b0\u1ee3ng mol c\u1ee7a alanine: 89 g\/mol → S\u1ed1 mol alanine: 425 \/ 89 = 4,78 mol<\/p><\/li> <li data-end=\"529\" data-start=\"360\">S\u1ed1 m\u1eaft xích alanine trung bình trong 1 phân t\u1eed protein: 4,78 \/ 0,0125 = 382,4 ≈ 328<\/strong><\/p><\/li><\/ul>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-11-01 14:51:56","option_type":"txt","len":0}]}