Quiz — الفرض الأول لثانية علوم تجربية.pdf

Question 1 sur 10 20:00

[{"id":8828,"question":"Quel est le rôle principal des chloroplastes dans une cellule végétale ?","option_a":"A. Stockage des nutriments","option_b":"B. Photosynthèse","option_c":"C. Production d'énergie (respiration)","option_d":"D. Synthèse des protéines","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les chloroplastes contiennent de la chlorophylle et permettent la photosynthèse, processus essentiel à la production de glucose et d'oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Stockage des nutriments\", \"b\": \"B. Photosynthèse\", \"c\": \"C. P","_debug_options_count":4},{"id":8829,"question":"La molécule d'ADN est composée de deux brins antiparallèles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'ADN est effectivement constitué de deux brins antiparallèles, c'est-à-dire orientés en sens inverse (5'→3' et 3'→5').","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8830,"question":"Quel est le symbole chimique de l'élément oxygène ?","option_a":"A. O","option_b":"B. Ox","option_c":"C. Og","option_d":"D. O2","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le symbole chimique de l'oxygène est 'O', tandis que 'O2' représente sa forme moléculaire diatomique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"A. O\", \"b\": \"B. Ox\", \"c\": \"C. Og\", \"d\": \"D. O2\"}}","_debug_options_count":4},{"id":8831,"question":"Une force de 10 N déplace un objet sur une distance de 5 m. Quel est le travail effectué ?","option_a":"A. 2 J","option_b":"B. 50 J","option_c":"C. 15 J","option_d":"D. 5 J","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le travail (W) se calcule par la formule W = F × d, soit 10 N × 5 m = 50 J.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. 2 J\", \"b\": \"B. 50 J\", \"c\": \"C. 15 J\", \"d\": \"D. 5 J\"}}","_debug_options_count":4},{"id":8832,"question":"Les acides ont un pH inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Par définition, un pH inférieur à 7 indique une solution acide, tandis qu'un pH supérieur à 7 indique une solution basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8833,"question":"Quel est le nom de la liaison qui unit deux acides aminés dans une protéine ?","option_a":"A. Liaison peptidique","option_b":"B. Liaison hydrogène","option_c":"C. Liaison ionique","option_d":"D. Liaison covalente","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les acides aminés sont liés entre eux par des liaisons peptidiques, formées lors de la condensation de deux acides aminés.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"A. Liaison peptidique\", \"b\": \"B. Liaison hydrogène\", \"c\": \"C. Li","_debug_options_count":4},{"id":8834,"question":"Un circuit électrique en série a une intensité de 2 A. Si on ajoute une résistance en série, l'intensité totale :","option_a":"A. Augmente","option_b":"B. Diminue","option_c":"C. Reste la même","option_d":"D. Devient nulle","option_e":"","option_f":"","bonne_reponse":"b","explication":"Dans un circuit en série, l'ajout d'une résistance augmente la résistance totale, ce qui diminue l'intensité du courant (loi d'Ohm).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Augmente\", \"b\": \"B. Diminue\", \"c\": \"C. Reste la même\", \"d\": \"","_debug_options_count":4},{"id":8835,"question":"Les mitochondries sont appelées 'centrales énergétiques' de la cellule.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les mitochondries produisent de l'énergie (ATP) via la respiration cellulaire, d'où leur surnom de 'centrales énergétiques'.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8836,"question":"Quel est le nombre de neutrons dans un atome de carbone 14 (14C) ?","option_a":"A. 6","option_b":"B. 8","option_c":"C. 12","option_d":"D. 14","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le carbone 14 a un nombre de masse de 14 (protons + neutrons). Comme il a 6 protons, le nombre de neutrons est 14 - 6 = 8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. 6\", \"b\": \"B. 8\", \"c\": \"C. 12\", \"d\": \"D. 14\"}}","_debug_options_count":4},{"id":8837,"question":"La loi de conservation de la masse s'applique-t-elle à une réaction chimique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de Lavoisier stipule que 'rien ne se perd, rien ne se crée, tout se transforme', donc la masse totale des réactifs est égale à celle des produits.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]