DNA

Where is our DNA located ? ( select 2 boxes )

• inside the chromosomes

• comes from the food we eat

• inside the cells

• in the air we breathe

What is the shape of DNA ?

• straight line thread

• double helix

• square shape

• rectangle shape

Why does DNA is shaped like this ? ( in the figure)

• to fit in the large space of the chromosome

• to fit in the small space of the chromosomes

• to have less genetic information

The basic unit of DNA is called

• nucleus

• nucleotide

• tide

• molecule

Label the part A in the figure .

• sugar

• nitrogen base

• phosphate group

• atom

Label the part B in the figure .

• sugar

• nitrogen base

• phosphate group

• atom

Label the part C in the figure .

• sugar

• nitrogen base

• phosphate group

• atom

which of the following is NOT a name of a nitrogen base in the DNA ?

• adenine

• cytosine

• guanine

• melamine

Which of the following is a part of nucleotide in DNA ?

• nitrogen base

• hydrogen base

• nitrate group

• salt

What is DNA replication ?

• Process of DNA copying itself to make another DNA

• process of DNA destroying itself when the cell dies

• process of DNA correcting the mistakes in its codes

• the process of the two DNA joining to make later DNA