Post-Test Review 21-22

The periodic table organizes elements according to INCREASING

• atomic mass

• energy level

• atomic number

• valence number

Which of the atoms shown has an atomic number of 4?

• A

• B

Oven cleaner is highly caustic chemical that reacts with baked on foods. It is dangerous to the touch and is very slippery feel.

What is the likely pH of oven cleaner?

• below 4

• around 7

• above 10

• between 5 and 7

White blood cells, part of the ___________ system, work closely with the _______ system to protect us from infection and disease.

• circulatory; immune

• endocrine; lympathic

• circulatory; excretory

• circulatory; respiratory

A simple change in DNA results in

• a mutation

• cell death

• replication

• an adaptation

In a eukaryotic cell, DNA is found in

• a vacuole

• a nucleus

• a cytoplasm

• an endoplasmic reticulum

According to Mendel's law of dominance, we would expect ______ percent of the offspring to have white flowers.

• 0

• 25

• 50

• 75

RHINO QUESTION:

Which tenet of the cell theory BEST serves as a basis for this type of biotechnology?

• all living things are made up of cells

• all cells are basically the same in chemical composition

• the cell is structural and functional unit of all living things

• cells contain hereditary information passed down cell division

A portion of DNA, known as a ________, is responsible for the inheritance of a trait, like eye color or blood type in humans.

• chromosome

• codon

• gene

• nucleotide

During science class Billy used litmus paper to determine the pH of an unknown liquid. The blue litmus paper turned red but there was no change in the color of the red litmus paper.

The liquid Billy tested is probably

• a base

• neutral

• an acid

• of pH 7