bio exam 1

CL- is an example of

anion

which functional group at the x would you add ti show ethyl group to produce ethanol which is an alcohol

-O-H

a reaction in which app is cleaved allowing a second unfavorable reaction to occur is

a coupled reaction

k+ is transported into cells by a protein that cleaves atp the concentration of k+ inside the cell is greater than the k+ outside of the cell. what type of transport is occurring

active transport

which statements about all living things is true

all living things are capable of reproduction

this organelle is found in plant cells

all of the above

which functional group is present on this molecule

amino group

it is presently thought that a chlorophyll is essential for photosynthesis. which of the following observations would disprove this hypothesis

any of the observations would disprove the hypothesis

a protein known as a phospholipase removes fatty acids from phospholipids. what cellular structure would be most affected by this enzyme

cell membranes

which of the following is an example of a carbohydrate

cellulose

which of the following would not normally be found in a plasma membrane

cellulose

sulfur and nitrogen atoms ____

different number of protons, different numbers of valence electrons, diff of chemical bonds

what organelle is shown in figure a

endoplasmic reticulum

which of the sequences below goes from the largest to the smallest

liver cells, cell nucleus, hemoglobin, amino acid, carbon atom

this contains the vast majority of the cells DNA

nucleus

Compared to 40K, the isotope 39K has

one less neutron

why is water cohesive

one side of the molecule is slightly positive and the other side slightly negative, water molecules participate in hydrogen bonds

which element is most likely to form polar covalent bonds in biological systems

oxygen

which type of linkage connect amino acids in protein

peptide bonds

one of the principle functions of the cell wall is to

protect the cell from osmotic lysis

bacillus anthracis cells were treated with lysozyme which destroys the cell wall. these treated cells are then placed in pure water. what would you expect to happen to this cell

they would swell and then burst

in biological molecules nitrogen atoms normally form ___ bonds

three covalent

what organelle is shown in figure b

Golgi complex

this organelle contains proteins

all the above

why does your instructor argue that a carrot in the market is alive

capable of growth, metabolically active, reproduction, nutrients from the environment

o2 enters human muscles cells. no energy is needed for this process and no transport proteins are required. what membrane transport process is likely to be involved

simple diffusion

which is an example of a lipid

triglyceride

carbon atoms tend to form ____

covalent

this molecule is a simple sugar

see test

this molecule is an amino acid

see test

Acid rain sometimes has a pH of 5. What is the H+ concentration?

1x10^-5 M

the h+ concentration in a person's stomach might be as low as 1x10^-2 M after eating five Congo burritos at the sanitary burrito factory. what is the pH of that person's stomach

2

maltose is a disaccharide consisting of two glucose sugars linked together. what is its formula

C12H22O11

sedoheptulose is a seven carbon sugar. what is the molecular formula

C7H14O7

sulfur has 6 electrons in its outer electron shell. it combines covalently with hydrogen to form a stable compound. what is the structure of this compound

H2S2

which gas was much less abundant in earth's early atmosphere than it is now

O2

a mole of water weighs 18 grams while a mole of sucrose weighs 342 grams which statement is true

a mole of sucrose has the same number of molecules as a mole of water

cellulose is

a structural polysaccharides found in plants

in which structures do all of the atoms have a reasonable numbers of chemical bonds

all of them

this orgnalle is involved in energy generations

mitochondria

a condensation reaction______

removal of water, formation of new covalent bonds, involved in synthesis of polysaccharides proteins and triglycerides

which component is present in prokaryotic cells

ribosomes

this molecule contains an ester

see test

this molecule contains fatty acid

see test

a nucleic acid was isolated from a new plague-causing virus. analysis of the nucleic acid indicated the following base compsition. 20% adenine, 30% uraci, 10% guanosine, 40% cytosine. from the information which of the statements are true

the virus contains RNA

which of the following is not associated with protein function

all of these function are associated with proteins

after a flesh wound some of the skin fibroblast cells begin to move into the wound area. which subcellualr listed below is directly involved in this process of cell movement

cytoskeleton

______ are components of phospholipids

fatty acids

you are trying to identify an organism by looking at a group of its cells under a microscope. it is multicellular and the cells clearly have a cell wall. the cells have many internal organelles but no cholorphlasts. to which kingdom does this organism belong

fungi

in alpha helix, a hydrogen atom participates in a covalent bond with a nitrogen atom of one amino acid and also weakly interacts with an oxygen atom. what is the second weaker interaction called

hydrogen bond