Cells, Digestion and Energy in Living Systems

Cell structure and the cell theory, the digestive and circulatory systems, and how photosynthesis and respiration store and release energy.

10 questions, free, marked as you go with a worked explanation on every one.

What this covers

What is the function of the mitochondrion in a cell?
Which two structures are found in a plant cell but not in an animal cell?
What is the relationship between photosynthesis and cellular respiration?
Where does most of the absorption of nutrients into the bloodstream take place?
A food label lists 15 g of protein, 45 g of carbohydrate and 12 g of fat per serving. Protein and carbohydrate each supply about 4 kcal per gram, and fat supplies about 9 kcal per gram. How many kilocalories are in one serving?
A resting heart pumps about 70 mL of blood with each beat and beats 72 times per minute. How many millilitres of blood does it move in one minute?
Which statement is part of the cell theory?
A person's daily energy need is about 2 400 kcal. A meal supplies 348 kcal. What percentage of the daily need does that meal provide, rounded to one decimal place?
What is the main function of the nucleus in a cell?
What is the main function of the cell membrane?