GRADE 7 EST1 REVIEW

Choose the best definition of diffusion.

• Water molecules move from high concentration to low concentration

• Happens through semi permeable membrane

• Net movement from low concentration to high concentration

• Net movement of gas molecules from high region to low region

Choose the best definition of active transport.

• Net movement of gas particles from high concentration to low concentration

• Net movement from low concentration to high concentration

• Water molecules that move from high concentration to low concentration

• It happens through semi permeable membrane

Potato strip has soaked into a water solution for an hour. Then it places to a sucrose solution for an hour. What happens to a potato strip and name of the process.

• Get longer - diffusion

• Get shorter - diffusion

• Get longer - osmosis

• Get shorter - osmosis

The function of plasmids in bacteria cells is ...

• code to make a protein

• aerobic respiration

• multiply the cell

• give a firm shape

A food sample add with Benedict's solution and turns to orange. What nutrients contain in the food sample?

• Fats and oils

• Proteins

• Starch

• Sugar

... reagent is to test the presence of protein.

• Benedict's solution

• Iodine solution

• Ethanol solution

• Biuret solution

A food sample formed a white emulsion when using ... reagent and it shows that a food sample contains of ...

• Benedict's - sugar

• Biuret - protein

• Iodine - starch

• Ethanol - fats and oils

A food sample turns from blue to red brick and on the other test tube it changed color to blue black. Find the best conclusion.

• A food sample is tomato.

• A food sample must contains of sugar and protein.

• A food sample must contains of sugar and starch.

• A food sample is lemon.

The diagram shows the bases in a section of DNA from one strand only.

A-C-T-T-C-A-G-T-C

What is the base sequence on the complementary DNA strand?

• G-T-C-C-T-C-G-T-A

• T-G-A-A-G-T-C-A-G

• C-A-G-G-A-C-T-G-A

• T-G-A-A-G-A-T-A-G

Cats and rabbits are from the kingdom of animal and the genus of a mammal. Find the best answer describe about cats and rabbits.

• Cats and rabbits are able to breed together.

• Cats and rabbits both are invertebrate.

• Cats and rabbits are from different family.

• Cats and rabbits are a different species.