Grade 9/ Biology/ 1st term exam

The concentration of nitrate ions in a root cell is higher than in the surrounding soil solution.

How do the nitrate ions move into the root cell?

• Active transport

• Diffusion

• Osmosis

• Transpiration

Starch is digested to maltose by the enzyme amylase.

Which is the key and lock?

• Amylase, maltose

• Amylase, starch

• Starch, amylase

• Starch, maltose

Which chambers of the human heart contain oxygenated blood?

• Left atrium and left ventricle

• Left atrium and right ventricle

• Right atrium and left ventricle

• Right atrium and right ventricle

In which order do these events occur in human nutrition

• Digestion -ingestion-absorption-assimilation

• Digestion-ingestion assimilation-absorption

• Ingestion-digestion-absorption-assimilation

• Ingestion-digestion-assimilation-absorption

Tennis players often eat bananas during long matches.

Which nutrient in a banana is a important during the match

• Carbohydrate

• Fibre

• Iron

• Vitamin C

What causes the transfer of materials between capillaries and tissue fluid

• Active transport

• Blood pressure

• Capillarity

• Osmosis

What does the hypothalamus control?

• Adrenaline secretion

• Body temperature

• Heart beat

• Memory

Urea is removed by the kidneys. What is this process called?

• Dialysis

• Diffusion

• Egestion

• Excretion

Magnesium is an essential element for

• The formation of cell walls

• The formation of chlorophyll

• The formation of proteins

• The process of cell division

In which regions of the alimentary canal does amylase act?

• Mouth cavity and pancrease

• Mouth cavity and ileum

• Stomach and pancrease

• Stomach and ileum