ข้อสอบชีววิทยา-เคมี ม.4

Explanation
Enzymes are a type of protein that act as catalysts in biological reactions. They help speed up chemical reactions in the body by lowering the activation energy required for the reaction to occur. Enzymes are essential for various processes in the body, such as digestion, metabolism, and cellular respiration. They are made up of amino acids and have a specific shape that allows them to bind to specific substrates and convert them into products. Therefore, the correct answer is protein.

Explanation
The correct answer is "ลดพลังงานกระตุ้น" which means "reduce energy activation". This is the correct statement about enzymes. Enzymes are biological catalysts that speed up chemical reactions in living organisms. They do this by lowering the activation energy required for the reaction to occur. By reducing the energy needed for the reaction, enzymes facilitate and accelerate the reaction without being consumed in the process.

Explanation
The correct answer is "กาแลกโตส+กลูโคส" because when glucose and fructose combine, they form sucrose, which is a disaccharide molecule consisting of one glucose molecule and one fructose molecule.

Explanation
HCl is a compound made up of one hydrogen atom (mass of 1) and one chlorine atom (mass of 35.5). Therefore, the molecular mass of HCl is the sum of the masses of hydrogen and chlorine, which is 36.5.

Explanation
The correct answer is "คลาสชิโลโพดา" because the question is asking about the class of animals to which the "ตะขาบ" belongs in the taxonomy system of the Arthropoda phylum. In this case, "คลาสชิโลโพดา" refers to the class Insecta, which includes insects such as beetles.