Unit 1A Review Flashcards
What does this safety symbol mean?
corrosive
What does this safety symbol mean?
biohazard
What does this safety symbol mean?
flammable
What does this safety symbol mean?
hot surface
What does this safety symbol mean?
dangerous to environment
How do you correctly dilute an acid?
Add the acid to the water, not the water to the acid.
What is the FIRST thing you should do whenever there is an accident or emergency in the science lab?
alert the teacher
Who needs to wear safety glasses?
everyone
How do you correctly read volume from a graduated cylinder?
What is the volume of this graduated cylinder?
Read from the lowest point of the curve (meniscus.) The volume of this cylinder is 20 mL.
List the 8 characteristics of living things.
Made of Cells
Homeostasis
Reproduction
Materials and Energy
Universal Genetic Code
Growth and Development
Response to Environment
Evolution/Change Over Time (as a population)
How many independent variables should be tested at one time?
one
What are 2 examples of a nucleic acid?
DNA and RNA
What is the primary function of a carbohydrate?
Main source of energy for living things
What is the monomer of a protein?
amino acid
Because enzymes only catalyze one reaction and must fit with their substrate, we say they are _____.
substrate specific
All cell contain a _____, _____ and _____.
cell membrane, genetic material and cytoplasm
What are the differences between plant and animal cells?
Plants have chloroplasts, a cell wall and a large vacuole.
Animals have centrioles.
What type of bond is used to join amino acids into a protein?
peptide
List the principles of the cell theory.
Cells are the basic units of life.
All cells come from other cells.
All organisms are composed of cells.
What is the monomer of a carbohydrate?
monosaccharide
The variable that is manipulated by the experimenter.
independent
This organelle stores materials, especially water
vacuole
This organelle is the site of protein synthesis
ribosome
What is the monomer of a nucleic acid?
nucleotide
What are three functions of a cell’s nucleus?
Stores DNA
Controls the cell’s processes
Contains the information to make proteins
What is this piece of lab equipment?
beaker
What is this piece of lab equipment?
graduated cylinder
What is the purpose of an enzyme?
change the speed of a chemical reaction
Give an example of a prokaryotic cell.
bacteria
This organelle is responsible for energy conversion in the cell
mitochondrion
This organelle transports materials within the cell
endoplasmic reticulum
This microscope part adjusts the amount of light used to view an organism
diaphragm
What is this piece of lab equipment?
test tube rack
What is this piece of lab equipment?
forceps
What three scientists contributed to the development of the cell theory?
Schleiden, Schwann and Virchow
What are the differences between eukaryotic and prokaryotic cells?
Prokaryotes lack membrane-bound organelles.
What is this piece of lab equipment?
Erlenmeyer flask
This organelle digests large particles in the cell
lysosome
This microscope part contains the scanning, low and high power objectives
nosepiece
If a substance has a pH of 3, is it an acid or a base?
acid
What elements are contained in lipids?
carbon, hydrogen and oxygen
List the levels of organization from cell to biosphere.
cell, tissue, organ, organ system, organism, population, community, ecosystem, biome, biosphere
Which type of graph is used to compare data in discrete catagories?
bar
Which type of graph is used to show change over time with continuous data?
line
Which type of graph is used to show percentages and comparison to the whole?
circle
Why is a control group a necessary part of an experiment?
It allows the experimenter to make comparisons between groups and valid conclusions.
What elements are contained in proteins?
carbon, hydrogen, oxygen, and nitrogen
What is this piece of lab equipment?
pipette
What elements are contained in nucleic acids?
carbon, hydrogen, oxygen, nitrogen and phosphorus
This organelle stores and packages chemicals
Golgi apparatus
