WorksheetsBiology
Total questions: 12
Worksheet time: 7mins
The elements that can be found in carbohydrates are
Carbon, hydrogen, oxygen
Carbon, nitrogen, oxygen
Carbon, hydrogen, oxygen, nitrogen
Carbon, hydrogen, oxygen, sulphur
The simplest sugars are also known as
monosaccharides
disaccharides
polycharides
Name the 4 main biomolecules.
(a)
Lactose is made of
two fructose molecules
two glucose molecules
one glucose molecule and one fructose molecule
one glucose molecule and one galactose molecule
What is the main component of the cell wall of plant cells?
lignin
cellulose
pectin
chitin
One role of the human skin is to help protect the body against bacteria. The optimal pH of human skin is 5.5.
What is true about the pH of human skin?
it is basic
it is neutral
it is jimmyjeffy
it is acidic
the human body needs to maintain a pH level between 1 and 2 in order to properly digest food.
what is true regarding the environment of the human stomach?
it is basic
it is neutral
it is acidic
it is jimmyjeffysuziebob
Chemical used to test starch
Potassium hydroxide
Iodine
Sodium hydroxide
