Exam 1 Flashcards
Ch. 1, 2, & 3
The smallest unit of life that can survive and reproduce on its own is:
The cell
Producers obtain energy from:
The sun
ability of organism to contain a constant internal environment is called
homeostasis
Which domains are made of organisms w/o nuclei?
Archea and Bacteria
eukaryotes that range from single cells like amoeba to multicells seaweeds are members of the kingdom:
Protista
A scientific name consists of the following:
Genus and specific epithet
Science only addresses that which is:
Observable
A testable explanation for a natural phenomenon is an:
Hypothesis
Experimental result that is statistical significant is:
unlikely to occur by chance alone
Fundamental building blocks of all matter
Atoms
Negative subatomic particles is:
Electron
Isotopes of the same element differ in the number of:
neutrons
In the shell model, how many electrons can the second shell hold?
8
What is form when an atom loses or gains an electron?
an Ion
What type of bond is formed when atoms share a pair of electrons?
covalent
what is a Hydrogen bond?
a week bond, attraction that forms bw an electronegative atom and a hydrogen atom taking part in a separate covalent bond
Why is water important to living organisms?
bc a. its cohesive properties
b. temperatures stabilizing properties
c. liquid at room temperature
d. it has capacity to dissolve other substances
from one to ten on PH scale, which is most acidic?
1
cellular Ph is kept near a value of seven due to:
the action of buffers
The atom diagnostically associated with organic compounds is:
Carbon
An OH group is an:
Hydroxyl group
The formation of large molecules from small subunits is known as what kind of reaction?
Condensation
Which reaction results of breakdown of macromolecule into simpler substances?
Hydrolysis
Which is a building block of carbohydrates?
monosaccharide
What do functional groups do when bonded to an organic molecule?
They impart specific chemical properties such as polarity or acidity to that molecule.
Samples of lipids are:
steroids, triglycerides, oils and waxes
Cell membranes are characterized by the presence of:
Phospholipids
What kind of building blocks are proteins are made of:
Amino acids building blocks
What type of bonds links proteins together?
Peptide bonds
The primary structure of a protein is the
The sequence of amino acids
Proteins may function as:
structural units, enzymes, storage molecules, and transport molecules
What is the study of life called:
Biology
