Transcript biology eoc questions biochemistry

1. What is the function of enzymes in biological
system?
A. Enzymes act as product to create new chemical reactions.
B. Enzymes act as catalyst to drive chemical reactions forward.
C. Enzymes act as substrates when the necessary proteins
are unavailable.
D. Enzymes bond with substrate to create the new
reaction product.
ANSWER B
2.
Which of the following macromolecules are a
prominent part of animal tissues that function
in insulation, helping animals conserve heat?
A. Nucleic acids
B. Proteins
C. Carbohydrates
D. Lipids
ANSWER D
3. Both lipids and carbohydrates are important
in animal cells because both –
A. provide insulation
B. form cell walls
C. contain nitrogen
D. store energy
ANSWER D
4. Biochemical substances in the human body are
maintained at about a neutral pH except for the A. Lymph
B. Stomach fluids
C. Blood
D. Internal material of living cells
ANSWER B
5. Most cellular activities are processes regulated
by the action of –
A. Enzymes
B. Polysaccharides
C. Carbohydrates
D. Lipids
ANSWER A
6. Students conducted an investigation using Biuret reagent to
determine the presence of protein in different foods. The
results are shown below.
SUBSTANCE
Honey
Cottage Cheese
Potato
Water
Chicken broth
Yogurt, plain
Test for Proteins
COLOR AFTER ADDING BIURET
Blue
Purple/lavender
Dark blue
Light blue
Dark purple
Light purple
According to the data, which foods tested by the
students contained protein?
F. Honey and Potato
G. Potato and Chicken broth
H. Cottage cheese and Water
J. Cottage cheese and Yogurt
ANSWER J
7. Which best describes how enzymes function in the
body?
A. Enzymes are converted in products by the reaction
they catalyze.
B. Enzymes lower the activation energy of reactions.
C. One enzyme can catalyze many different reactions.
D. An enzyme is used once and then destroyed by the
cell
ANSWER B
8. Which molecules store and transmit genetic I
information?
F. lipid
G. proteins
H. nucleic acids
J. carbohydrates
ANSWER H
9. Antibodies are composed primarily of amino acids.
In which class of biomolecules would antibodies
belong?
A. nucleic acids
B. carbohydrates
C. proteins
D. lipids
ANSWER C
10. A student test an unknown colorless solutions for the
presence of sugars, starches, lipids, and proteins results are
shown below.
UNKNOWN SOLUTION RESULTS
TESTING INDICATOR
OBSERVATION
Iodine
Unknown solution turned from
colorless to brown-orange
Benedict’s Solution
Unknown solution turned from
colorless to orange
Biuret Solution
Unknown solution turned from
colorless to purple
Brown Paper Bag
No mark left, unknown solution
completely
Based on the data, collected, which molecules
are present in the unknown solution?
F. starches and lipids
G. proteins and starches
H. sugars and proteins
J. lipids and proteins
ANSWER H