December 6

1.

1 point

Which nitrogen base in RNA is NOT part of DNA?

cytosine

adenine

uracil

guanine

2.

1 point

DNA is shaped like a

straight ladder.

spiral staircase.

long, thin rod.

triple helix.

3.

1 point

What process is responsible for producing most of Earth's oxygen?

replication

mutation

respiration

photosynthesis

4.

1 point

The order of the bases along a gene determines the order in which

genes are arranged on a chromosome.

amino acids are put together to form a protein

chromosomes are arranged in the nucleus

sugars are put together to form a carbohydrate.

5.

1 point

Each rung of the DNA ladder is made of

four nitrogen bases.

three nitrogen bases.

a pair of nitrogen bases.

a single nitrogen base.

6.

1 point

Why are viruses like parasites?

They use a host cell to survive through reproduction.

They make their own food.

They multiply uncontrollably.

They use energy to develop.

7.

1 point

What type of microorganism causes tinea pedis?

bacteria

fungus

virus

algae

8.

1 point

What products are produced during photosynthesis?

carbon dioxide and water

carbon dioxide and sugar

light energy and carbon dioxide

sugar and oxygen

9.

1 point

Which of the following statements does NOT describe an active virus?

It becomes part of the host cell's genetic material.

It attaches to the host cell.

It takes over the host cell's functions.

It destroys the host cell.

10.

1 point

Which statement about respiration is correct?

Plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen.

Glucose is produced and energy is released.

Carbon dioxide and water combine to form glucose and release oxygen.

Glucose, in the presence of oxygen, is broken down releasing energy.

11.

1 point

What does messenger RNA do during protein synthesis?

copies the coded message from the DNA and carries it into the nucleus

copies the coded message from the DNA and carries it into the cytoplasm

copies the coded message from the protein and carries it into the nucleus

carries amino acids and adds them to the growing protein

12.

1 point

Why are the words "light energy" written above the arrow in the photosynthesis equation?

Light energy is necessary for the reaction to occur.

Sugar can exist only in the presence of light.

Light energy is produced during the reaction.

Oxygen can exist only in the presence of light.

13.

1 point

What raw materials are needed for respiration to occur?

sugar and carbon dioxide

energy and water

carbon dioxide, water, and energy

sugar and oxygen

14.

1 point

Where does protein synthesis take place?

in the chromosomes in the nucleus of the cell

on the chromosomes in the cytoplasm of the cell

in the ribosomes in the nucleus of the cell

on the ribosomes in the cytoplasm of the cell

15.

1 point

What is a karyotype?

a picture of the chromosomes in a cell

fluid that surrounds a baby before it is born

blood from a newborn baby

a picture of a baby before it is born

16.

1 point

The organelle in which photosynthesis takes place is the

chlorophyll

chloroplasts

mitochondria

nucleus

17.

1 point

During DNA replication, adenine always pairs with

adenine

cytosine

guanine

thymine

18.

1 point

What are chromatids?

doubled rods of condensed chromatin

identical strands of chromosomes

pigments that absorb the energy in sunlight

identical daughter cells

19.

1 point

No two people have the same DNA, except for

siblings

crime suspects.

identical twins

fraternal twins

20.

1 point

Nucleotides are formed from

guanine and cytosine

adenine and thymine

DNA and RNA

sugar/phosphates and nitrogen bases