BIO 201 Midterm Exam | Score 185/200 | Straighterline

7/5/25, 4:53 PM Midterm Exam
Topic 7: Graded Midterm Exam

Started on Saturday, July 5, 2025, 5:19 PM
State Finished
Completed on Saturday, July 5, 2025, 5:52 PM
Time taken 32 mins 38 secs
Grade 185.00 out of 200.00 (92.5%)




Question 1
Which of the following groups are related to the organ system?
Correct

5.00 points out Select one:
of 5.00 a. Integumentary system, skeletal system, muscular system, nervous system.
b. Carbohydrates, proteins, lipids, nucleic acid.
c. Cytoplasm, mitochondria, golgi complex, endoplasmic reticulum.
d. Hydrogen, oxygen, carbon, nitrogen.




Question 2
How does the positive feedback mechanism during childbirth differ from negative feedback systems
Correct commonly found in the body?
5.00 points out
of 5.00 Select one:
a. The mechanism that reverses a deviation from the set point
b. Positive feedback results in a change in the body's status rather than a return to
homeostasis.
c. Positive feedback leads to a magnified change, propelling the system back to the normal
range.
d. Positive feedback counteracts deviations from the normal range.




Question 3
What is a necessary condition for the formation of hydrogen bonds?
Correct

5.00 points out Select one:
of 5.00 a. Absence of electronegative atoms
b. Formation of ionic bonds between hydrogen atoms
c. Involvement of two hydrogen atoms
d. The presence of a partially positively charged hydrogen atom bonded to an
electronegative atom




Question 4
What is the core structure of triglycerides?
Correct

5.00 points out Select one:
of 5.00 a. Glycerin with three steroids
b. Glycerol with three fatty acids
c. Glycerin with three fatty acids
d. Glycerol with three steroids

, 7/5/25, 4:53 PM Midterm Exam




Question 5
Why is the octet rule considered crucial in chemistry?
Correct

5.00 points out
I. It governs the atomic number of noble gases.
of 5.00
II. It determines the chemical properties of elements.
III. It dictates the mass-to-charge ratio of ions.
IV. It guides the formation of stable electron configurations.

Select one:
a. I and III
b. I and II
c. III and IV
d. II and IV




Question 6
With the given atomic numbers for various elements (Carbon - 6, Hydrogen - 1, Oxygen - 9,
Correct Sodium - 11), carefully identify which element would likely fill three electron shells.
5.00 points out
of 5.00 Select one:
a. Sodium
b. Hydrogen
c. Oxygen
d. Carbon




Question 7
In the context of a moving car, how is kinetic energy specifically involved in the process?
Correct

5.00 points out Select one:
of 5.00 a. Potential energy is converted into kinetic energy during driving.
b. Kinetic energy is the energy stored in the car.
c. Kinetic energy is required to lift and place the car.
d. Kinetic energy is released when the car is stationary.




Question 8
Considering the role of R-groups in amino acids, what impact would the presence of sulfur-
Correct containing R-groups (e.g. cysteine) have on protein assembly?
5.00 points out
of 5.00 Select one:
a. Prevention of amino acid dehydration synthesis.
b. Accelerated peptide bond formation.
c. Promotion of disulfide bond formation.
d. Inhibition of hydrogen bond formation.




Question 9
What is the difference in hydrogen ion (H+) concentration between vinegar (pH 2) and black coffee
Correct (pH 5)?
5.00 points out
of 5.00 Select one:
a. Vinegar has 10 times more protons than black coffee.
b. Vinegar has 3 times more protons than black coffee.
c. Vinegar has 100 times more protons than black coffee.
d. Vinegar has 1,000 times more protons than black coffee.