Bio 100 EXAM 1

which of the following is a carboxyl group?

-COOH

which of the following is an amino group?

-NH2

what is the complementary sequence to the DNA strand TCGATGG?

AGCTACC

the tree in your backyard is home to two cardinals, a colony of ants, a wasp's nests, two squirrels, and millions of bacteria. together, all of these organisms represent

a community

you will notice over the past month, many students on campus have started wearing anew style of school sweatshirt. you think to yourself that perhaps the bookstore has recently started selling this new style of sweatshirt. this is an example of

a hypothesis

a hypothesis is

a proposed explanation for a set of observations

the teeth of grain eating animals are usually broad and ridged. this makes the teeth suitable for grinding and chewing. meat eating animals have pointed teeth that are good for puncturing and ripping flesh. this illustrates

a result of natural selection as well as the connection between form and function

which of the following statements about the domain bacteria is true?

all bacteria lack nucleus

organic compounds

always contain carbon

glucose molecules are to starch as ___ are to proteins

amino acids

how are these two amino acids attached together?

amino group to carboxylic acid group

which of the following would be correctly classified as a protein

an enzyme

what is the difference between a tissue and a organ system?

an organ system includes tissues

a theory ia

and explanation of an idea that is broad in scope and supported by a large body of evidence

organisms belonging to the kingdom plantae

are photosyntheitc

organisms that are prokaryotes are in the domains

bacteria and archaea

which of the following statements about ecosystems is false?

bacteria and fungi recycle energy within an ecosystem

which of the following statements is not an example of evolution that has resulted from human activity?

because of hunting, organisms such as bears are fewer in numbers

members of the kingdom animalia

can obtain their food by eating other organisms

which of the following statements regarding carbon is false?

carbon has the ability to bond up to six other atoms

which of the following lists contains only polysaccharides?

cellulose, starch, and glycogen

DNA differs from RNA because DNA

contains thymine in place of uracil

consider thee following statement "if all the vertebrates have backbones, and turtles are vertebrates, then the turtles have backbones.' this statement is an example of

deductive reasoning

which of the following statements about genetics is true?

differences among organisms reflect their different nucleotide sequences in their DNA

which of the following statements about evolution is true?

evolution can result in adaptations

what feature of fats makes them hydrophobic?

fats have nonpolar hydrocarbon chains

sucrose is formed

from two monosaccharides through dehydration synthesis

which of the following is a kingdom within the domain Eukarya?

fungi

which of the following organisms contain the polysaccharide chitin?

fungi and insects

the storage form of carbohydrates is ____ in animals and ____ in plants.

glycogen; starch

your instructor asks you to look into your microscope to see a prokaryotic cell. you will be looking for a cell that

has a membrane

the results of dehydration synthesis can be reversed by

hydrolysis

which of the following statements is not consistent with darwin's theory of natural selection?

individual organisms experience genetic changes during their life spans to better fit their environment

basic science discoveries often lead to the development of technology, and the development of technology often leads to new scientific discoveries. which of the following is not accurate pairing pf technology and a discovery?

invention of the microscope and creation of evolutionary trees

if you were to add olive oil to your food as part of a diet to lower your risk of atherosclerotic disease, you would use olive oil that

is liquid at room temperature

which level in the hierarchy shown is a community?

level C

peptide bonds

link amino acids

life is organized in a hierarchical fashion. which of the following sequences correctly lists that hierarchy from least inclusive to most inclusive?

molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem

which of the following statements regarding a common cellular activity is false?

new cells are derived from cellular components like organelles

a phospholipid is composed of

one glycerol molecule linked to one phosphate group and two fatty acids

what combination of these fatty acids could you use to make a fat that is liquid at room temperature?

one palmitic acid, one stearic acid, and ibe oleic acid

if you eat a hamburger, you are mainly eating ground up beef muscle. what levels of organization are represented in this ground up muscle?

organelle, cell, tissue

which of the following statements about the properties is false?

organisms have an unchanging constant internal environment

a major type of lipid found in cell membranes is

phospholipids

the role of a control in a experiment group is to

provide a basis of comparison to he experimental group

a protein containing more than one polypeptide chain exhibits the ___ level of protein structure

quanternary

to be scientifically valid, a hypothesis must be

testable and falsifiable

kingdom fungi includes species

that obtain food by decomposing dead organisms and absorbing nutrients

the primary structure of a protein is

the amino acid sequence of the polypeptide chain

amino acids can be distinguished from one another by

the chemical properties of their R groups

how are genes used by cells to build proteins?

the genes in DNA direct the synthesis of an RNA molecule, which is used to build a protein

these two molecules are structural isomers. what is the difference between them?

the location of a double bonded oxygen atom

propanol and isopropanol are isomers. this means that they have

the same molecular formula but different chemical properties

proteins differ from one another because

the sequence of amino acids in the polypeptide chain differs from protein to protein

an antibiotic kills 99.9% of a bacterial population. you would expect the next generation of bacteria

to be more resistant to that antibiotic

what is the general function of enzymes within a cell?

to speed up chemical reactions

a disaccharide forms when

two monosacchardes join by dehydration synthesis

a scientist performs a controlled experiments. this means that

two versions of the experiment are conducted, one differing from the other by only a single variable

in an ecosystem, energy

typically flows from producers through a series of consumers

fatty acids with double bonds between some of their carbons are said to be

unsaturated