Homework 1

Question 1

what type of bond links carbohydrate monomers together

Answer 1

glycosidic bonds

Question 2

what is the name of an atom carrying an overall positive charge

Answer 2

cation

Question 3

T or F: hydrogen bonds are a covalent bond forming between dipoles

Answer 3

true

Question 4

this level of protein structure is best defined as three dimensional globular structure of a single polypeptide chain

Answer 4

tertiary

Question 5

what nucleotide base is found in RNA but not DNA

Answer 5

uracil

Question 6

T or F: hydrolysis uses water to combine two reactants into a single product

Answer 6

false

Question 7

what is the difference in protons between a pH of 3 and a pH of 1

Answer 7

100x

Question 8

T or F: saturated fatty acids are solid at room temperature and their fatty acid tails contain no double bonds

Answer 8

true

Question 9

fimbraie

Answer 9

short, bristle-like structures primarily used for attachment

Question 10

pili

Answer 10

hair-like appendage that can be used for conjugation

Question 11

flagella

Answer 11

long filament used for motility

Question 12

capsule

Answer 12

coating around the cell that excludes small particles

Question 13

circular bacteria growing in a chain would best be characterized as

Answer 13

streptococci

Question 14

T or F: teichoic acid is found in the cell wall of gram-positive bacteria but NOT gram-negative bacteria

Answer 14

true

Question 15

what type of environment is characterized by a lower concentration of solute outside the cell than inside the cell

Answer 15

hypotonic

Question 16

extrachromosomal, circular DNA found in many types of bacteria

Answer 16

plasmids

Question 17

T or F: gram-negative bacteria have a thicker layer of peptidoglycan than is found in gram-positive bacteria

Answer 17

false

Question 18

T or F: the Black Death that killed so many people during the middle ages is caused by a dangerous virus

Answer 18

false

Question 19

which individual was the first to use microscopy to visualize bacteria cells

Answer 19

van Leeuwenhoek

Question 20

T or F: the idea of “washing hands to prevent the spread of pathogens” introduced by Ignaz Semmelweis was immediately popular and instituted at all major hospitals

Answer 20

false

Question 21

which group is not considered “fully alive” due to not being made of a cell or cells

Answer 21

viruses