IB Biology Option C

State the typical pH range found in the small intestine

• 1.0 - <4.0

• 4.0 - 5.5

• 5.5 - 7.5

• 6.0 - 8.0

Which of the following is not a function of enzymes

• They speed up the rate of breaking down larger molecules into smaller ones

• Enzymes are proteins and work best under optimal pH and temperature

• Each reactant requires a specific enzyme

• As temperature rises beyond body temperature the rate of reaction increases

Which of the following statements is true

• Glucose is transported across the brush border membrane by diffusion

• Amino acids are transported across the brush border membrane by diffusion

• Fatty acids are transported across the brush border membrane by diffusion

• Water is transported across the brush border membrane by diffusion

Which of the following diffuses into the lacteal then back into the bloodstream

• Glucose

• Protein

• Triglycerides

• Water

Which of the following diffuses into the blood stream after it crosses the basolateral membrane

• Glucose

• Fatty acids

• Protein

• Both glucose and protein

How does hydrogen bonding contribute to the unique properties of water?

• Hydrogen bonding in water molecules leads to high cohesion, surface tension, and the ability to absorb heat.

• Hydrogen bonding in water molecules leads to low cohesion, low surface tension, and the ability to absorb heat.

• Hydrogen bonding in water molecules leads to low cohesion, low surface tension, and the inability to absorb heat.

• Hydrogen bonding in water molecules leads to low cohesion, surface tension, and the inability to absorb heat.

Tags

NGSS.HS-ESS2-5

Describe the process of cohesion and adhesion in water.

• Cohesion is the attraction between water molecules, causing them to stick together. Adhesion is the attraction between water molecules and other substances, causing them to stick to surfaces.

• Cohesion is the attraction between water molecules, causing them to stick to surfaces. Adhesion is the attraction between water molecules and other substances, causing them to stick together.

• Cohesion is the attraction between water molecules, causing them to repel each other. Adhesion is the attraction between water molecules and other substances, causing them to repel from surfaces.

• Cohesion is the repulsion between water molecules, causing them to separate. Adhesion is the repulsion between water molecules and other substances, causing them to separate from surfaces.

Explain the concept of polarity in water molecules.

• Absence of electrical charge within the molecule

• Equal distribution of electrical charge within the molecule

• Uneven distribution of electrical charge within the molecule

• Polarity refers to the shape of the water molecule

How does water play a crucial role in biological systems?

• Water is the main component of cells and is involved in various metabolic processes.

• Water is harmful to biological systems.

• Water is only important for hydration.

• Water has no role in biological systems.

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-5

What is the significance of the high specific heat capacity of water in living organisms?

• Protection against extreme temperatures.

• Temperature regulation and stabilization of internal body temperature.

• Enhancement of metabolic reactions.

• Transportation of nutrients and waste products.

Tags

NGSS.HS-LS1-3