Q. What is the net gain of ATP from one molecule of glucose during aerobic respiration? (2023)
A.
2 ATP
B.
30-32 ATP
C.
36 ATP
D.
38 ATP
Show solution
Solution
The net gain of ATP from one molecule of glucose during aerobic respiration is approximately 30-32 ATP, depending on the efficiency of the process.
Correct Answer: B — 30-32 ATP
Learn More →
Q. What is the net gain of ATP molecules from one molecule of glucose during aerobic respiration? (2023)
A.
2
B.
18
C.
30-32
D.
36
Show solution
Solution
The net gain of ATP molecules from one molecule of glucose during aerobic respiration is approximately 30-32 ATP.
Correct Answer: C — 30-32
Learn More →
Q. What is the normal pH range of human blood? (2019)
A.
6.8 - 7.2
B.
7.35 - 7.45
C.
7.0 - 7.5
D.
7.8 - 8.0
Show solution
Solution
The normal pH range of human blood is tightly regulated between 7.35 and 7.45, which is essential for proper physiological function.
Correct Answer: B — 7.35 - 7.45
Learn More →
Q. What is the normal pH range of human urine? (2022)
A.
4.5 - 5.5
B.
6.0 - 7.0
C.
7.5 - 8.0
D.
9.0 - 10.0
Show solution
Solution
The normal pH range of human urine is typically between 6.0 and 7.0, indicating it is slightly acidic.
Correct Answer: B — 6.0 - 7.0
Learn More →
Q. What is the normal respiratory rate for a healthy adult at rest? (2022)
A.
10-12 breaths per minute
B.
12-20 breaths per minute
C.
20-30 breaths per minute
D.
30-40 breaths per minute
Show solution
Solution
The normal respiratory rate for a healthy adult at rest is typically between 12 to 20 breaths per minute.
Correct Answer: B — 12-20 breaths per minute
Learn More →
Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.03 atm
B.
1.96 atm
C.
0.82 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L·atm/(K·mol))(298 K) = 2.03 atm.
Correct Answer: A — 2.03 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L atm/K mol) (2020)
A.
2.06 atm
B.
0.82 atm
C.
1.01 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L atm/K mol)(298 K) = 2.06 atm.
Correct Answer: A — 2.06 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 0.1 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.5 atm
B.
0.82 atm
C.
1.0 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 moles * 0.0821 * 298) / 1 = 2.5 atm.
Correct Answer: A — 2.5 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (2021)
A.
12.3 atm
B.
24.6 atm
C.
6.1 atm
D.
3.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer: B — 24.6 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2021)
A.
12.3 atm
B.
10.2 atm
C.
8.2 atm
D.
6.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 12.3 atm.
Correct Answer: B — 10.2 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (2021)
A.
0.0821 atm
B.
1.0 atm
C.
2.0 atm
D.
4.0 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 1 * 2 * 0.0821 * 298 = 4.0 atm (i = 1 for glucose).
Correct Answer: C — 2.0 atm
Learn More →
Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
0.82 atm
B.
1.64 atm
C.
2.46 atm
D.
4.92 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (2 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 4.92 atm.
Correct Answer: B — 1.64 atm
Learn More →
Q. What is the outermost layer of a plant stem called? (2022)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
Show solution
Solution
The outermost layer of a plant stem is called the epidermis, which protects the plant from environmental damage.
Correct Answer: B — Epidermis
Learn More →
Q. What is the outermost layer of cells in a plant called? (2023)
A.
Cortex
B.
Epidermis
C.
Phloem
D.
Xylem
Show solution
Solution
The outermost layer of cells in a plant is called the epidermis, which protects the plant from environmental damage.
Correct Answer: B — Epidermis
Learn More →
Q. What is the outermost whorl of a flower called? (2023)
A.
Calyx
B.
Corolla
C.
Androecium
D.
Gynoecium
Show solution
Solution
The outermost whorl of a flower is called the calyx, which is made up of sepals.
Correct Answer: A — Calyx
Learn More →
Q. What is the oxidation state of nitrogen in NH4Cl? (2023)
Show solution
Solution
In NH4Cl, the oxidation state of nitrogen is -3, as it is bonded to four hydrogens.
Correct Answer: A — -3
Learn More →
Q. What is the packing efficiency of a body-centered cubic (BCC) structure? (2020)
A.
52%
B.
68%
C.
74%
D.
100%
Show solution
Solution
The packing efficiency of a body-centered cubic (BCC) structure is approximately 68%.
Correct Answer: B — 68%
Learn More →
Q. What is the path difference for the first minimum in a single-slit diffraction pattern? (2021)
A.
λ/2
B.
λ
C.
3λ/2
D.
λ/4
Show solution
Solution
The path difference for the first minimum in single-slit diffraction is λ/2.
Correct Answer: A — λ/2
Learn More →
Q. What is the peak voltage of an AC source if its RMS voltage is 220 V? (2021)
A.
311 V
B.
220 V
C.
155 V
D.
440 V
Show solution
Solution
The peak voltage (V_peak) is related to the RMS voltage (V_rms) by the formula V_peak = V_rms × √2. Therefore, V_peak = 220 V × √2 ≈ 311 V.
Correct Answer: A — 311 V
Learn More →
Q. What is the peak voltage of an AC supply if its RMS voltage is 220 V? (2021)
A.
311 V
B.
220 V
C.
155 V
D.
440 V
Show solution
Solution
The peak voltage (V_peak) is related to the RMS voltage (V_rms) by the formula V_peak = V_rms × √2. Therefore, V_peak = 220 V × √2 ≈ 311 V.
Correct Answer: A — 311 V
Learn More →
Q. What is the percentage error if the measured value is 10.0 and the true value is 9.5? (2021)
A.
5.26%
B.
4.76%
C.
2.5%
D.
10%
Show solution
Solution
Percentage error = (|Measured - True| / True) × 100 = (|10.0 - 9.5| / 9.5) × 100 = 5.26%.
Correct Answer: B — 4.76%
Learn More →
Q. What is the percentage error if the measured value is 20 and the true value is 25? (2021)
A.
20%
B.
25%
C.
5%
D.
10%
Show solution
Solution
Percentage error is calculated as (|True Value - Measured Value| / True Value) * 100 = (|25 - 20| / 25) * 100 = 20%.
Correct Answer: D — 10%
Learn More →
Q. What is the percentage error if the measured value is 20.0 and the true value is 19.5? (2021)
A.
2.56%
B.
1.25%
C.
3.33%
D.
5.00%
Show solution
Solution
Percentage error = (|Measured - True| / True) × 100 = (|20.0 - 19.5| / 19.5) × 100 ≈ 2.56%.
Correct Answer: A — 2.56%
Learn More →
Q. What is the percentage error if the true value is 50 and the measured value is 48? (2022)
Show solution
Solution
Percentage error = |(True value - Measured value) / True value| * 100 = |(50 - 48) / 50| * 100 = 4%.
Correct Answer: A — 4%
Learn More →
Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M? (2019)
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-3) = 3.
Correct Answer: B — 3
Learn More →
Q. What is the pH range of normal human urine? (2022)
A.
4.5 - 5.5
B.
6.0 - 7.0
C.
7.5 - 8.0
D.
8.5 - 9.0
Show solution
Solution
Normal human urine typically has a pH range of 6.0 to 7.0, which can vary based on diet and health.
Correct Answer: B — 6.0 - 7.0
Learn More →
Q. What is the phase difference between two particles executing simple harmonic motion in the same direction with the same amplitude and frequency? (2023)
Show solution
Solution
If two particles are executing simple harmonic motion in the same direction with the same amplitude and frequency, their phase difference is 0.
Correct Answer: A — 0
Learn More →
Q. What is the phase difference between two particles executing simple harmonic motion in the same direction with the same frequency? (2021)
Show solution
Solution
If they have the same frequency and direction, the phase difference is 0.
Correct Answer: A — 0
Learn More →
Q. What is the phase difference between two particles executing simple harmonic motion in phase? (2021)
A.
0 radians
B.
π/2 radians
C.
π radians
D.
3π/2 radians
Show solution
Solution
In phase means the phase difference is 0 radians.
Correct Answer: A — 0 radians
Learn More →
Q. What is the phase of the cell cycle where DNA is replicated? (2020)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
Show solution
Solution
The S phase (Synthesis phase) is where DNA replication occurs, resulting in the duplication of chromosomes.
Correct Answer: B — S phase
Learn More →
Showing 1051 to 1080 of 2736 (92 Pages)