Cells 1.5 #1 Question Preview (ID: 7432)


Enzymes.[print questions]

In the body of a human, the types of chemical activities occuring within cells are most dependent on the
a) biological catalysts present
b) size of the cell
c) number of chromosomes in the cell
d) kind of sugar found on each chromosome

Which group of organic compounds includes the enzymes?
a) starches
b) carbohydrates
c) proteins
d) nucleic acids

Experiments revealed the following information. It can be broken down into amino acids. This molecule is most likely a(n)
a) monosaccharide
b) enzyme
c) hormone
d) inorganic molecule

Which cell organelle synthesizes enzymes?
a) ribosomes
b) nucleus
c) cell membrane
d) vacuole

In order to survive, all organisms must carry out
a) autotrophic nutrition
b) heterotrophhic nutrition
c) enzyme controlled reactions
d) the process of reproduction

Only small amounts of enzymes are required fo reactions within cells because enzymes are
a) fragile
b) small molecules
c) constantly synthesized
d) reused

The enzyme salivary amylase will act on starch but not on protein. This action illustrates that salivary amylase
a) contains starch
b) is chemically specific
c) is not reusable
d) lacks protein

Why might heating an enzyme slow the rate at which the rate occurs?
a) it kills the enzyme
b) the enzyme is specific
c) it changes its shape
d) it changes the substrate

Enzymes influence chemical reactions in living systems by
a) becoming apart of the product after the after the reactions occur
b) combining with atomospheric gases
c) affecting the rate at which reactions occur
d) absorbing water during synthesis and digestion

All of these affect the rate of enzyme reaction expect
a) temperature
b) enzyme concentration
c) pH
d) light

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