GRADE 9 QUIZ

It is a segment of DNA or RNA molecule that contains the information needed to code for protein.

• a. exon

• b. Introns

• c. phenotype

• d. promoter region

______ are the basic units of heredity in living organisms.

____ is the molecule that carries the genetic instructions for life.

• a. Genes

• b. RNA

• c. DNA

• d. None of these

DNA is composed of two long strands that form a double helix, containing sequences of four chemical bases. Enumerate the four chemical bases.

True or false, eating or drinking in the laboratory is acceptable as long as you are careful not to spill anything.

• a. True

• b. False

• c. Neither A or B

• d. None is correct

______ are specific sequences of DNA that play a crucial

role in regulating gene expression.

True or False, You should always wear safety goggles when handling chemicals, even if you are wearing prescription glasses.

• a. True

• b. false

• c. Neither A or B

• d. None is correct

True or False, It is fine to directly smell a chemical substance to identify it, as long as you do it quickly.

• a. False

• b. True

• c. Neither B or A

• d. None is correct

It is a segments of DNA within a gene that does not code for

proteins.

It play's a crucial role in integrating information from various

parts of the brain to prepare and initiate voluntary movements.