Multiple Choice Flashcards
Which of the following is NOT a goal of science?
To use data to support a particular point of view
Scientific hypotheses must be proposed in a way that…
Enables them to be tested
The ability to reproduce results is an important part of any…
Experiment
A theory…
May be revised or replaced
The space surrounding the nucleus of an atom contains…
Electrons
What makes up a molecule of water?
Two atoms of hydrogen and one atom of oxygen
What type of ion forms when an atom loses electrons?
Positive
The most abundant compound in most living things is…
Water
When salt is dissolved in water, water is the…
Solvent
A substance with a pH of 6 is called…
An acid
A monosaccharide is a…
Carbohydrate
If a reaction in one direction releases energy, the reaction in the opposite direction….
Absorbs energy and is endergonic
Enzymes affect the reactions in living cells by changing the…
Speed of the reaction
Which cell structure contains the cell’s genetic material and controls many of the cell’s activities?
Nucleus
Cells fall into two broad categories, depending on whether they…
Have a nucleus
Eukaryotes usually contain
A nucleus, genetic material, and specialized organelles
What is not found in a nucleus?
Cytoplasm
Which structures carry out cell movement?
Microtubules and Microfilaments
Which organelle breaks down compounds into small particles that the cell can use?
Lysosome
Which organelle make proteins using coded instructions that come from the nucleus?
Ribosome
Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?
Mitochondrion
Which of the following is a function of the cell membrane?
Regulates which materials enter and leave the cell
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes…
Water to move into the cell
The cells of multicellular organisms are…
Specialized to perform particular functions
An organ system is a group of organs that…
Work together to perform a specific function
Biology is the study of
Living organisms
The process by which organisms keep their internal conditions fairly constant is called?
Homeostasis
What is the term for a group of organisms of one type of living in the same place?
Population
The nucleus is made of
Protons and neutrons
A solution is a(an)
Evenly distributed mixture of a solute dissolved in a solvent
What is the term used to describe the energy needed to get a reaction started?
Activation Energy
A substance that speeds up the rate of a chemical reaction is called a(an)
Catalyst or an Enzyme
The thin, flexible barrier around a cell is called the…
Cell membrane
Prokaryotes lack…
A nucleus
The main function of the cell wall is to…
Support and protect the cell
Diffusion is the movement of particles from
An area of high concentration to an area of low concentration
The diffusion of water across a selectively permeable membrane is called
Osmosis
Which of the following is an example of an organ?
Heart
A group of similar cells that perform a particular function is called a(an)
Tissue
An animal cell that is surrounded by salty water will shrink because the osmotic pressure causes
Water to move out of the cell
