Plant Cell Biology Quiz

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Questions and Answers

What is the primary function of the Golgi apparatus in a cell?

It produces energy through aerobic respiration.

It creates proteins for cell activity.

It facilitates cell division.

It stores, sorts, and packages substances from the ER. (correct)

What is the role of mitochondria in a plant cell?

They carry out aerobic respiration. (correct)

They synthesize proteins.

They store cell sap.

They transport substances to the cell membrane.

What structure is responsible for protection and shape in a plant cell?

Cell wall (correct)

Cytoplasm

Nucleus

Cell membrane

What do chloroplasts contain that is essential for photosynthesis?

Chlorophyll Signup and view all the answers

Which organelle is exclusively absent in plant cells?

Centrioles Signup and view all the answers

What is the function of the large central vacuole in plant cells?

To store cell sap and take in waste products. Signup and view all the answers

Which part of the plant cell is responsible for energy production?

Mitochondrion Signup and view all the answers

The tonoplast is associated with which structure in plant cells?

Central vacuole Signup and view all the answers

What determines the direction of water movement through a partially permeable membrane?

Concentration of solutes Signup and view all the answers

What will happen to a plant cell in a solution with a higher water potential than its cell sap?

It will become turgid. Signup and view all the answers

What kind of pressure is exerted by the contents of a turgid plant cell?

Turgor pressure Signup and view all the answers

Why can water molecules move through the partially permeable membrane but sucrose molecules cannot?

Water molecules are smaller. Signup and view all the answers

What is the primary function of the cellulose cell wall in plant cells regarding osmosis?

To provide rigidity and prevent overexpansion. Signup and view all the answers

How does the net movement of water molecules occur in a setup with 10% and 20% sucrose solutions?

From the 10% sucrose solution to the 20% sucrose solution. Signup and view all the answers

What happens to the cell contents once a plant cell becomes turgid?

They exert pressure on the cell wall. Signup and view all the answers

What is a characteristic of a solution that has a lower water potential?

It is more concentrated with solutes. Signup and view all the answers

What is the main function of diffusion in cells?

Nutrient uptake and gaseous exchange Signup and view all the answers

How does a concentration gradient affect the movement of dissolved oxygen into a cell?

Oxygen diffuses into the cell where its concentration is lower Signup and view all the answers

What is the definition of osmosis?

Movement of water from high water potential to low water potential Signup and view all the answers

What happens to the water potential when a solution becomes more concentrated?

Water potential decreases Signup and view all the answers

In the context of a U-tube setup with sucrose solutions, what would likely happen after some time?

The water level in one arm will increase while it decreases in the other Signup and view all the answers

Which statement regarding cell respiration and diffusion is accurate?

Oxygen continuously diffuses into cells undergoing respiration Signup and view all the answers

What is a characteristic of a partially permeable membrane?

It selectively permits certain substances to pass Signup and view all the answers

Which of the following statements about water potential is true?

Water potential affects the movement of water molecules Signup and view all the answers

What is the function of amylase in digestion?

Converts starches into sugars Signup and view all the answers

Which component of the digestive system is primarily responsible for nutrient absorption?

Villus in the small intestine Signup and view all the answers

What role does the hepatic portal vein play in digestion?

Transporting blood rich in absorbed nutrients to the liver Signup and view all the answers

Which of the following is NOT a function of the liver?

Digestion of dietary fats Signup and view all the answers

What are the end-products of carbohydrate metabolism in the liver?

Glucose and ketones Signup and view all the answers

What effect does excessive alcohol consumption have on the liver?

Causes liver damage Signup and view all the answers

What is the primary role of lacteals in the villi?

Absorbing dietary fats Signup and view all the answers

Which part of the digestive system is responsible for the physical and chemical digestion of food?

Mouth Signup and view all the answers

What is the role of bile in the small intestine?

To emulsify fats Signup and view all the answers

Which enzyme is produced by the pancreas for carbohydrate digestion?

Amylase Signup and view all the answers

What structure connects the pancreas to the duodenum?

Pancreatic duct Signup and view all the answers

What process in the mouth helps increase the surface area of food for digestion?

Chewing by teeth Signup and view all the answers

What process moves food through the small intestine?

Peristalsis Signup and view all the answers

What is the function of salivary amylase found in saliva?

To break down starch into maltose Signup and view all the answers

What is the optimum pH condition for enzymes in the small intestine?

Alkaline Signup and view all the answers

What action causes food to move through the oesophagus?

Peristalsis Signup and view all the answers

What is the optimum pH for the enzyme pepsin?

2 Signup and view all the answers

Which part of the small intestine is primarily involved in mixing chyme with digestive juices?

Duodenum Signup and view all the answers

What is the end product of fat digestion in the small intestine?

Fatty acids and glycerol Signup and view all the answers

What is formed when food reaches the stomach and is mixed with gastric juices?

Chyme Signup and view all the answers

The three parts of the small intestine are the duodenum, jejunum, and what?

Ileum Signup and view all the answers

What role does gastric acid play in digestion?

It denatures salivary amylase. Signup and view all the answers

What is the function of the pyloric sphincter?

To regulate chyme passage into the small intestine Signup and view all the answers

Which type of muscle contractions are involved in the movement of food along the alimentary canal?

Peristaltic muscle contractions Signup and view all the answers

Study Notes

O Level Biology Topical Revision Notes

This book provides comprehensive revision notes for O Level Biology, adhering to the latest Singaporean syllabus.
The book is divided into 16 topics, each covering a specific area of the syllabus.
Important concepts are highlighted with relevant examples and diagrams for better understanding.
The notes aim to aid teachers in teaching the subject.
Students can use these notes to prepare for their O Level Biology examination.

A detailed table of contents is provided, listing each topic and its corresponding page numbers.
Each topic covers various subtopics related to its content.

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Description

Test your knowledge on the essential organelles and functions within plant cells. This quiz covers topics such as the roles of chloroplasts, mitochondria, and the structure responsible for cell protection. Challenge yourself with questions about osmosis and the movement of water through membranes.