5+5×5-5 = ?

😁👋 Hey guys! Do you want a quiz on enzymes?

If so you're answer is yes, put reactions below so that I can post the questions!

1. What is an enzyme?

• A type of carbohydrate
• A protein that catalyzes biochemical reactions
• A lipid that stores energy
• A nucleic acid that carries genetic information

2. Which of the following is a general property of enzymes? They:

• are consumed in reactions.
• lower the activation energy of reactions.
• can function at only one temperature.
• are always active.

3. What is the primary function of enzymes? To:

• provide structural support
• store genetic information
• catalyze biochemical reactions
• transport substances across membranes

4. Enzymes are specific to their substrates because of:

• size
• color
• charge
• shape

5. Which level of protein structure involves the sequence of amino acids?

• Primary structure
• Secondary structure
• Tertiary structure
• Quaternary structure

6. The folding of a polypeptide into a three-dimensional shape is referred to as:

• Primary structure
• Secondary structure
• Tertiary structure
• Quaternary structure

7. Which model describes the interaction between an enzyme and its substrate as a lock and key?

• Induced fit model
• Lock and key model
• Transition state model
• Allosteric model

8. The induced fit model suggests that:

• The enzyme's active site is rigid.
• Enzymes do not interact with substrates.
• The enzyme changes shape to fit the substrate.
• Substrates can bind without any structural change.

9. In enzyme-substrate binding, what is formed when an enzyme binds to its substrate?

• Product
• Inhibitor
• Coenzyme
• Enzyme-substrate complex

10. What happens to the enzyme after the reaction is complete?

• It is permanently altered.
• It becomes inactive.
• It must be destroyed.
• It remains unchanged and can be reused.

Answers


1. A protein that catalyzes biochemical reactions
2. lower the activation energy of reactions.
3. catalyze biochemical reactions
4. shape
5. Primary structure
6. Tertiary structure
7. Lock and key model
8. The enzyme changes shape to fit the substrate.
9. Enzyme-substrate complex
10. It remains unchanged and can be reused.

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Topic 4: Central Nervous System and Its Functions

Brief explanation on analogy 🧠🫀
#SAT #Analogy
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How many of these 11 questions on skeletal system can you get right ✅️?

Put reactions if you want the answers!

1. What kind of joint does not allow any movement?
• A. Hinge joint
• B. Ball & Socket joint
• C. Suture joint
• D. Pivot joint


2. What type of joint is found between the femur and the pelvis?
• A. Hinge joint
• B. Gliding joint
• C. Ball & Socket joint
• D. Saddle joint


3. Which joint allows movement in only one direction, like opening and closing a door?
• A. Ball & Socket
• B. Hinge joint
• C. Pivot joint
• D. Gliding joint


4. The joint found between the first (atlas) and second (axis) cervical vertebrae is called:
• A. Hinge
• B. Pivot
• C. Saddle
• D. Gliding


5. In what type of joint would you find synovial fluid?
• A. Fibrous joint
• B. Amphiarthrosis
• C. Diarthrosis
• D. Synarthrosis


6. What is the main function of synovial fluid?
• A. To supply blood
• B. To store calcium
• C. To support bone growth
• D. To reduce the friction between bones


7. Which type of joint allows the most movement?
• A. Hinge joint
• B. Pivot joint
• C. Ball & Socket
• D. Gliding joint


8. Where can you find a saddle joint in the human body?
• A. Elbow joint
• B. Hip joint
• C. Thumb joint
• D. Skull


9. Which of these is NOT part of the axial skeleton?
• A. Skull
• B. Vertebral column
• C. Ribs & Sternum
• D. Clavicle


10. What does the appendicular skeleton consist of?
• A. Skull, vertebral column & ribcage
• B. Arms, legs, shoulder girdle, pelvic girdle
• C. Only upper limbs
• D. Only lower limbs


11. Which of the following bones belongs to the axial skeleton?
• A. Femur
• B. Humerus
• C. Sternum
• D. Scapula

Here are the answers

1. C
2. C
3. B
4. B
5. C
6. D
7. C
8. C
9. D
10. B
11. C

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