SBI3C Exam Review 2025

Which of the following substances is least likely to dissolve in water?

• salt

• sugar

• oil

• vinegar

• food colouring

Which of the following is a disaccharide?

• fructose

• maltose

• glycogen

• cellulose

• protein

Which of the following best describes the role of fats in the human body?

• primary source of quick energy

• main component of cell walls

• reserve supply of energy

• source of genetic material

• enzyme production

Lucas is preparing a presentation on human biology. He needs to highlight the 4 elements that make up 96% of the human body. Which elements should Lucas include in his presentation?

• O, P, Na, H

• O, C, H, N

• C, Ca, Co, Ct

• K, B, He, Li

• Cl, Na, Li, Ne

Which of the following is NOT a property of water?

• has a high heat capacity

• is less dense as a solid than as a liquid

• can dissolve many substances

• contracts when it freezes

• forms hydrogen bonds

Which of the following is classified as a carbohydrate?

• cholesterol

• phospholipids

• cellulose

• waxes

• triglycerides

Which of the following best describes the function of enzymes in living organisms?

• They provide energy for cells

• They speed up chemical reactions

• They store genetic information

• They are a type of nucleic acid

• They are used as structural components

Which part of the cell contains the genetic material?

• mitochondria

• ribosomes

• nucleus

• vacuole

• cell membrane

Neha is using a microscope in her biology lab. The microscope has a 10X ocular lens and a 40X objective lens. What is the total magnification Neha is using?

• 10X

• 40X

• 100X

• 400X

• 4000X

Which of the following structures is unique to plant cells?

• chloroplasts

• mitochondria

• cell wall

• nucleus

• cell wall and chloroplasts