biology 1 test 2
Terms in this set (49)
small no polar hydrophobic molecules such as fatty acids
easily pass through the membranes lipid bilayer
which of the following statements about lysosomes is FALSE
Lysosomes synthesize proteins from the recycled amino acids
which of the following types of molecules are the major structural components of the cell membrane
phospholipids and proteins
the storage form of carbohydrates is ________ in animals and _________ in plants
glycogen and starch
the idea that all living things are composed of cells and that all cells come from other cells defines the
using the image what is the type of functional group that is circled
which of the following statements regarding diffusion is false
diffusion occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated
a scientist wants to examine living cells lining the respiratory tract to determine how the cells use tiny hairs to move dirt and mucus away from the lungs. Which of the following instruments would be best and why?
a light microscope because it allows observations of the whole living cell
the two molecules seen in the image are structural isomers. What is the difference between them?
the location of double bonded oxygen atoms
the membranous compartmentalization of a cell...
allows different metabolic processes to occur simultaneously
how will brief heating (to 95 c) affect macromolecular structures in aqueous solution
DNA duplexes will unwind and seperate and proteins will unfold (denature)
the process where water is removed to build longer chains of monomers is called....
refer to the image to answer the following. The solution inside the balloon is_______ to the solution outside the
when physicians perform an organ transplant they choose a donor whose tissues match those of the recipient as closely as possible. Which of the following cell components are being matched
cell surface carbohydrates
who coined the term "cell"for studying microscopic organisms
according to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids
they can move laterally along the plane membrane
proteins that catalyze chemical reactions are called (hint: they reduce the activation energy of a reaction)
long thin fibers that function to provide cell shape, cell support and cell movements are part of the
which of these molecules is NOT formed by dehydration reactions
Which of the following options correctly pairs a polymer and its monomer
the covalent bond between two monosaccharides is called a(n)
which of the following is NOT monomer/polymer pairing
the structure to the right is characteristic of what level of protein structure
the golgi aparatus has a polarity of sideedness to its structure and function. Which of the following statements correctly describes this polarity?
all of the above correctly describe polar characteristics
for which of the following is the primary function to copy DNA and pass genetic information on to new cells and to new generations
intercellular junctions help to connect adjacent cells and unify them so they form one living continuum. Plants have_______ while animals have ________
the tertiary structure of proteins are held together by
all of the above
the cholesterol associated with animal cell membranes
helps to stabilize the cell membrane at body temperature
Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of...
which of the following structures is exclusively associated with eukaryotic cells?
A and C
in chemistry________ are molecules with the same molecular formula but different chemical structures. That is, they contain the same number of atoms of each element, but have different arrangements of their atoms in space
the function of the mitochondria is _____ while the function of the chloroplast is _____
as cell size increases the .....
volume increases faster than the surface area
all of the following are part of a typical prokaryotic cell except
an endoplasmic reticulum
two main functions of the rough endoplasmic reticulum are the production of...
phospholipids and proteins secreted by the cell
the covalent bond between monomers in a protein is called a (n)
if one strang of DNA molecule has the sequence of bases 5'-AACGTTAG-3' the other complementary strand would have the sequence
Which of the following is a carboxyl group
Protein structure was discovered by
you are told that the cells on a microscope slide are plant, animal or bacterial. You look at them through a microscope and see cell walls and membrane bound organelles. You conclude correctly that the cells...
are plant cells
which of the following processes includes all the others
which of the following types of lipids function as signaling molecules that travel through the body
celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a 0.15 m salt solution become limp and soft. From this we can decide that the cells of the celer stalks are..
hypertonic to freshwater but hypotonic to the salt solution
work by reflecting electrons off the surface of an object being studied
the process of a white blood cell engulfing a bacterium is
the movement of a substance across biological membrane against its concentration gradient with the help of energy input is which of the following
which of the structure-function pair is mismatched?
which of the following scientists was the first to hypothesize that membranes are made of lipids because substances that dissolve in lipids enter cells faster then those that are insoluble
a technique used to visualize the 3-d Structure of many proteins is known as