possible multiple choice questions
Which types of compounds are NOT classified as carbohydrates
Oils
Animal cells maintain their shape by having...
cytoskeleton
Which of the following is the best explanation for the formation of hydrogen bonds in water
The polarity of a water molecule
True or false: an ion is formed if an electron is lost or gained
True
Which of the following is an example of osmosis?
Water moving into the root cells of a plant
A semi-permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side. What will happen?
Water will move to the left side
Why would it be impossible to live without nucleic acids?
You would have no genetic information
How is a specific enzyme able to catalyze a reaction?
An enzyme can only bind with specific substrates of the reaction catalyzed
True or false: a hydrogen bond is stronger than an ionic bond
False
True or false: protons are shared or transferred in a bond
False
A monomer for a lipid is
Fatty acid
The monomer of proteins contains all of the following except...
Glycerol
When electrons are transferred between two atoms, what kind of bond is formed?
Ionic
If you see a cell under a microscope that has mitochondria and Golgi bodies then u know that...
It must be a eukaryote
Bears eat all summer to store energy for the winter hibernation. Which of these are their main energy source?
Lipids
Which of the following organic compounds are critical components of cell membranes?
Lipids
An enzymes role in cellular reactions is to...
Lower activation energy in order to increase the rate of reactions
Tay-Sachs is a disorder in which lipids are not properly digested. Which of these organelles is not functioning properly in people with this disorder?
Lysosomes
Which of the following characteristics best explains why humans sweat when their body temperature rises significantly?
Maintaining a stable internal environment
What organelle is found in cells like muscle cells which require lots of energy?
Mitochondria
A microscope has 10x and 15x eyepieces, and 10x and 44x objective lenses. What's the max magnification?
660x
The diffusion of a substance into or out of a cell requires...
A concentration gradient mitochondrion
Which of the following describes an atom?
A core of protons and neutrons surrounded by electrons
Monomer of proteins
Amino acids
Hydrogen bonds form...
Between the hydrogen and oxygen atoms of different water molecules
Which of the following helps maintain relatively constant pH levels within an organism?
Buffers
If scientists search other planets for life, they're most likely to focus on the presence of molecules containing which element?
Carbon
The element found in ALL organic compounds on earth is
Carbon
Nucleic acids contain which of the following elements?
Carbon, nitrogen, oxygen, hydrogen, and phosphorus
Which of the following is not a component of the monomer of nucleic acids
Carboxyl group
The exchange of oxygen and carbon dioxide between the body and the air occurs in the lungs. This exchange of gases takes place at the cellular level. What part of the cell is primarily responsible for this exchange?
Cell membrane
Which of the following is NOT one of the main components of the cell theory?
Cells must contains DNA
What kind of property of water allows bugs to stay on top of water
Cohesion
What is found in all cells?
DNA, ribosomes, cytoplasm, cell membrane
Which part of the microscope regulates the amount of light that reaches the objective lens?
Diaphragm
Cell missing lysosomes would have difficulty in doing what?
Digesting food
Facilitated diffusion ____________ require energy and uses the help of ___________
Does not, transport proteins
The orbits surrounding the nucleus of an atom contain?
Electrons
Which is required of all living things?
Energy
Amino acids, sugars, and ions move across the cell membrane. Their movement from areas of high concentration to areas of low concentration is accomplished with the help of special proteins in the cell membrane. What terms applies to this type of cell transport?
Facilitated diffusion
The following characteristics define what type of cell: is surrounded by a rigid coat of cellulose, contains mitochondria and chloroplasts, has a well defined nuclear membrane, and has DNA
Plant cell
What kind of bond connects the atoms within a water molecule
Polar covalent
Characteristic of all living things?
Reproduce sexually or asexually
Which is an organelle found in the cytoplasm?
Ribosome
What effect does salt used to melt snow have on plants?
The plants will die because the saltwater that forms when the snow melts is hypertonic to the plant cells and the plant will lose water and shrivel
A dependent variable is best described as...
The variable that is measured
The pH of a substance is 3. Which of the statements is true?
There is a greater concentration of H+ ions in this substance
What is NOT true about prokaryotes
They contain membrane bound organelles such as chloroplasts, vacuoles, and lysosomes
What's the function of vesicles
To transport water, salt, and molecules to the cell membrane
Which term best describes a solution with a pH of 5
acidic
Monomer of carbohydrates
monosaccharides
