Study of Life
In an experiment where some information is withheld both from participants and researchers, the experiment is referred to as _______.
Double blind
When two atoms share one or more pair of electrons, the bond formed is known as a(n) _________ bond.
Covalent
In all cells, organelles are suspended within the _________.
a. cytosol
b. gene
c. nucleoplasm
d. phospholipid bilayer
a. cytosol
What two organelles function in cellular energy?
Chloroplast and mitochondrion
A _________ is a unicellular prokaryote.
a. protist
b. pine tree
c. fish
d. bacterium
d. bacterium
If we change the amount of food given to mice, but keep all other factors in the experiment the same, the amount of food is the ______.
Independent variable
Water molecules are polar. A polar molecule is one in which the _________.
a. electrons are equally distributed around the molecule
b. electrons are unequally distributed around the molecule
c. protons are equally distributed in the nucleus
d. protons are unequally distributed in the nucleus
b. electrons are unequally distributed around the molecule
_________ are the major lipids of plasma membranes.
a. Triglycerides
b. Phospholipids
c. Fatty acids
d. Steroids
b. Phospholipids
What organelle plays a role in modifying proteins?
rough endoplasmic reticulum
Enzymes are almost always _________.
a. fats
b. steroids
c. monosaccharides
d. proteins
d. proteins
What is it called when complex molecules are made from simpler molecules?
Anabolism
An atom with a negative charge has _________.
a. more protons than electrons
b. more electrons than protons
c. more neutrons than protons
d. more neutrons than electrons
b. more electrons than protons
Which organelle is not defined by a membrane?
a. ribosome
b. mitochondrion
c. chloroplast
d. nucleus
a. ribosome
Information is transferred from the cell nucleus to ribosomes via _________.
a. mRNA
b. rER
c. sER
d. DNA
a. mRNA
What kind of reaction is represented below?
sucrose + water glucose + fructose
a. dehydration synthesis
b. hydrolysis
c. denaturation
d. gluconeogenesis
b. hydrolysis
After conducting background research, what is the next step in the scientific method?
Form a hypothesis
With what are saturated fats saturated?
a. phosphorous
b. nitrogen
c. carbon
d. hydrogen
d. hydrogen
The fatty acid tails of the phopholipids in the cell membrane are _____.
a. hydrophilic
b. hydrophobic
b. hydrophobic
The ability that the plasma membrane has to only let certain things in and out of the cell is called ___.
Selective permeability
Each different protein is unique due to its _________.
a. arrangement of monosaccharides
b. number of nucleotides
c. saturation
d. sequence of amino acids
d. sequence of amino acids
A scientific theory differs from a hypothesis in that a scientific theory is _____.
Based on a larger set of data, has been tested and is believed by many
An uncharged atom of gold has an atomic number of 79 and a mass number of 197. This atom has _________ protons, _________ neutrons, and _________ electrons.
a. 79; 118; 79
b. 118; 79; 118
c. 276; 118; 79
d. 79; 276; 79
a. 79; 118; 79
Of the following cell components, which is not double membraned?
a. nucleus
b. plasma membrane
c. rough ER
d. mitochondria
c. rough ER
The lysosomes are able to break down large molecules because they have ____.
enzymes and a low pH
What type of microscope is has the highest magnification?
Electron microscope