Metabolisme 1

Multiple Choice

What are the two main types of metabolism described in the text?

• Catabolism and Anabolism

• Respiration and Photosynthesis

• Fermentation and Oxidation

• Synthesis and Decomposition

Open Ended

Explain the lock-key theory proposed by Emil Fischer regarding enzyme activity.

Multiple Choice

What are the main components of enzymes and their functions?

• Apoenzyme

• Cofactor

• Prosthetic group

• All of the above

Multiple Choice

Enzim akan mengalami kerusakan pada suhu tinggi. Hal ini terjadi karena ....

• enzim tersusun dari senyawa-senyawa yang mengandung logam

• enzim mengandung senyawa protein yang mudah rusak pada suhu tinggi

• enzim tersusun dari senyawa-senyawa organik

• enzim tidak stabil pada suhu tinggi

Multiple Choice

Sebuah enzim selalu tersusun atas dua komponen senyawa kimia. Senyawa kimia tersebut adalah ....

• protein dan protein

• protein dan koenzim

• koenzim dan kofaktor

• koenzim dan koenzim

Fill in the Blank

Fill in the blank: Enzymes work by lowering the ___ required to initiate a chemical reaction.

Open Ended

Enzymes can work in small amounts and still be effective. What does this imply about their role in chemical reactions?

Multiple Choice

What are the characteristics of enzymes as described in the text?

• Specificity

• High energy consumption

• Irreversible reactions

• Non-specific action

Multiple Choice

What makes an enzyme substrate specific?

• Size
• Shape
• Name
• Location it is found in

Multiple Choice

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusable
• catalyst
• specific
• fragile

Multiple Choice

What is the difference between endoenzymes and exoenzymes?

• Endoenzymes work inside the cell, while exoenzymes work outside the cell.

• Endoenzymes are not proteins, while exoenzymes are proteins.

• Endoenzymes are only found in plants, while exoenzymes are found in animals.

• Endoenzymes are less efficient than exoenzymes.

Multiple Choice

Berikut ini adalah sifat-sifat enzim, kecuali ....

• bekerja spesifik

• tidak memengaruhi kesetimbangan reaksi

• mempercil penggunaan energi aktivasi

• di akhir reaksi berubah menjadi senyawa lain

• memiliki kisaran pH tertentu

Multiple Choice

Berdasarkan grafik tersebut, dapat disimpulkan bahwa ....

• enzim menurunkan energi aktivasi

• enzim meningkatkan energi aktivasi

• energi aktivasi tidak memengaruhi kerja enzim

• energi aktivasi meningkatkan kerja enzim

• kerja enzim tidak ada hubungannya dengan energi aktivasi

Multiple Choice

What factors affect enzyme activity according to the text?

• Temperature

• pH

• Concentration of substrate

• All of the above

Fill in the Blank

Fill in the blank: The optimal pH for Pepsin is ___ .

Multiple Choice

What is the relationship between pH and enzyme activity as shown in the graph?

• Enzyme activity increases with pH

• Enzyme activity decreases with pH

• Enzyme activity is optimal at a specific pH

• Enzyme activity is not affected by pH

Open Ended

What is an inhibitor in the context of enzyme activity?

Multiple Choice

What does the graph indicate about enzyme concentration and its effect on enzyme activity?

• Higher enzyme concentration always leads to higher enzyme activity.

• Enzyme activity decreases with increasing enzyme concentration.

• Enzyme activity increases with enzyme concentration until a certain limit.

• Enzyme concentration has no effect on enzyme activity.

Multiple Choice

What is the relationship between substrate concentration and enzyme activity as shown in the graph?

• Enzyme activity increases with substrate concentration until a maximum is reached.

• Enzyme activity decreases with substrate concentration.

• Enzyme activity remains constant regardless of substrate concentration.

• Enzyme activity is not affected by substrate concentration.

Multiple Choice

What is an activator in the context of enzyme activity?

• A substance that inhibits enzyme activity

• A substance that enhances enzyme activity

• A type of substrate

• A type of enzyme

Multiple Choice

What is the effect of a non-competitive inhibitor on enzyme activity?

• It binds to the active site

• It changes the shape of the enzyme

• It can bind to the enzyme regardless of substrate presence

• It has no effect on the enzyme

Multiple Choice

What is the role of a competitive inhibitor in enzyme activity?

• It binds to the active site of the enzyme

• It changes the shape of the enzyme

• It increases the reaction rate

• It has no effect on the enzyme

Open Ended

Nomenklatur merupakan cara penamaan. Secara umum, cara penamaan enzim disesuaikan dengan nama substratnya, yaitu nama substrat ditambah akhiran -ase. Sebagai contoh, enzim pengurai amilum menjadi maltose diberi nama maltase. Namun, ada beberapa enzim yang diberi nama tanpa akhiran -ase, seperti pepsin, tripsin, dan renin. Untuk enzim pengurai lemak disebut lipase, karena nama lain untuk lemak adalah lipid. Enzim dapat dikelompokkan menjadi beberapa golongan berdasarkan aspek penggolongannya. Berikut ini adalah tabel penggolongan enzim beserta fungsinya. Apa yang dimaksud dengan nomenklatur enzim?

Multiple Choice

Jika suatu enzim bertemu dengan inhibitor nonkompetitif, hal yang akan terjadi adalah ....

• sisi aktif enzim tetap berfungsi baik

• sisi aktif enzim berubah, tetapi masih dapat berikatan dengan substratnya

• sisi aktif enzim berubah, dan enzim kehilangan fungsinya

• sisi aktif enzim tetap, tetapi kerjanya menurun

Multiple Choice

What type of enzyme is responsible for the hydrolysis reaction?

• Oksidoreduktase

• Hidrolase

• Transferase

• Ligase

Multiple Choice

What is the function of the enzyme Peroksidase?

• To convert organic acids back and forth

• To assist in the oxidation of phenolic compounds

• To remove hydrogen from one substance to another

• To transfer phosphate groups between molecules

Multiple Choice

Letter B...

• active site
• enzyme
• substrate
• products

Multiple Choice

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.

Multiple Choice

What are the main products of glycolysis as shown in the diagram?

• 2 ATP

• 2 NADH

• 2 Pyruvate

• All of the above

Multiple Choice

What is the process that occurs during glycolysis?

• Conversion of glucose to PGAL

• Conversion of glucose to lactic acid

• Conversion of glucose to pyruvic acid

• Conversion of glucose to alcohol

Multiple Choice

Asam piruvat terbentuk baik pada respirasi aerob maupun anaerob. Pada reaksi aerob, asam piruvat akan ....

• dijadikan asam laktat

• disintesis menjadi molekul yang lebih besar

• masuk ke dalam siklus asam trikarboksilat (daur Krebs)

• berubah menjadi etil alkohol

Multiple Choice

What are the products of the oxidative decarboxylation process described in the image?

• 2 Acetyl CoA, 2 CO2, 2 NADH

• 2 Acetyl CoA, 2 CO2, 1 NADH

• 1 Acetyl CoA, 2 CO2, 2 NADH

• 2 Acetyl CoA, 1 CO2, 2 NADH

Multiple Choice

Pada proses dekarboksilasi oksidatif, CO2 yang dihasilkan berasal dari ....

• asetil koenzim A

• gugus karboksilat asam piruvat

• senyawa asetat

• asetaldehid

Multiple Choice

What is the sequence of the electron transport process as described in the text?

• NADH oxidation

• Coenzyme Q oxidation

• Cytochrome B oxidation

• FADH2 oxidation

Multiple Choice

Senyawa-senyawa yang digunakan dalam tahapan transport elektron pada proses respirasi sel sehingga dihasilkan ATP dan H2O adalah ....

• asam piruvat

• NADH dan FADH2

• asetil koA

• PGAL

Multiple Choice

Pada proses oksidasi FADH2, tidak terbentuk ATP. Hal ini terjadi karena ....

• ketersediaan ADP hanya sedikit

• elektron yang dibutuhkan cukup besar

• energi yang diperoleh kecil

• ketersediaan fosfat anorganik sedikit

Open Ended

Describe the steps involved in alcohol fermentation as illustrated in the diagram.

Fill in the Blank

Fill in the blank: The process of fermentation that converts sugars into alcohol is called ___ fermentation.

Multiple Choice

What is the process of anaerobic respiration and how does it differ from aerobic respiration?

• It requires oxygen

• It occurs in plants only

• It produces more energy than aerobic respiration

• It does not require oxygen

Open Ended

Describe the process of lactic acid fermentation in human muscle cells.

Multiple Choice

What is the role of NAD+ in glycolysis?

• It is used to produce ATP

• It is recycled during fermentation

• It is converted to lactic acid

• It is not involved in glycolysis

Multiple Choice

What are the end products of alcohol fermentation?

• 2 ethanol, 2 ATP, and 2 CO2

• 2 lactic acid and 2 ATP

• 2 glucose and 2 NADH

• 2 pyruvate and 2 ATP

Multiple Choice

What is the main difference between alcohol fermentation and lactic acid fermentation, except for which of the following?

• does not produce water molecules

• produces 2 molecules of ATP

• does not require free oxygen

• only goes through glycolysis

Multiple Choice

Saat melakukan proses respirasi anaerob, sel-sel ragi akan menghasilkan zat-zat berikut ini, kecuali ....

• karbon dioksida

• air

• asetaldehid

• etanol

Poll

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