LGS Mixed Practice Test #357

Question 1

At least he decided to quit the job, ___?

Accepted Answer

didn't he? — Positive past statement → negative past tag: 'didn't he?'

Answer

did he?

Answer

does he?

Answer

doesn't he?

Question 2

A competitive enzyme inhibitor typically affects which kinetic parameter of an enzyme-catalyzed reaction?

Accepted Answer

C. Increases Km (Michaelis constant). — Competitive inhibitors bind to the active site, competing with the substrate. This increases the apparent Km, meaning more substrate is needed to reach half Vmax, but Vmax remains unchanged if enough substrate is added to outcompete the inhibitor. Non-competitive inhibitors typically decrease Vmax without affecting Km.

Answer

A. Decreases Vmax (maximum reaction rate).

Answer

B. Increases Vmax (maximum reaction rate).

Answer

D. Decreases Km (Michaelis constant).

Question 3

Resting membrane potential of neuron:‌​‍

Accepted Answer

-70 mV (interior negative) — Na+/K+ pump + K+ leak channels. ‌​‍Action potential reaches ~+30 mV during depolarisation.

Answer

+70 mV

Answer

-200 mV

Answer

0 mV

Question 4

Types of WBCs:

Accepted Answer

5 — 5 types: neutrophils, lymphocytes, monocytes, eosinophils, basophils.

Answer

3

Answer

7

Answer

10

Question 5

Photoperiodism:‌​‍

Accepted Answer

Response to day/night length — Flowering response to light duration.‌​‍

Answer

Gravity

Answer

Water response

Answer

Temperature

Question 6

Humus found in:‌​‍

Accepted Answer

A horizon (topsoil) — Organic-rich top.‌​‍

Answer

C horizon

Answer

R horizon

Answer

B horizon

Question 7

A patient diagnosed with a terminal illness consistently blames their family for not taking them to the doctor earlier, despite having delayed seeking medical attention themselves. Which defense mechanism is this patient primarily exhibiting?

Accepted Answer

C. Projection — Projection involves attributing one's own unacceptable thoughts or feelings to another person. In this scenario, the patient is blaming their family for their own delay in seeking medical attention. Denial would be refusing to accept the diagnosis, repression would be unconsciously forgetting, and rationalization would be justifying their own actions with false but plausible reasons.

Answer

A. Denial

Answer

B. Repression

Answer

D. Rationalization

Question 8

Human circulatory system type:

Accepted Answer

Closed double — Closed double circulation.

Answer

Open

Answer

Closed single

Answer

Partial

Question 9

Aristotle called humans:

Accepted Answer

Political animal (zoon politikon) — Aristotle in 'Politics' called man a 'zoon politikon' — naturally inclined to live in a polis (city-state).

Answer

Rational animal

Answer

Social animal only

Answer

Economic animal

Question 10

Walk 4 km West, turn left, walk 3 km. Distance from start:‌​‍

Accepted Answer

5 km — Right triangle: 4² + 3² = 25. √25 = 5 km (Pythagoras).‌​‍

Answer

7 km

Answer

1 km

Answer

3 km

LGS Mixed Practice Test #357