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Math Physics Chemistry Biology QUESTION #566

Question 1

The two strands in DNA are coiled __________ to each other.

Parallel
Antiparallel✔️
Both A, B
None of these

Correct Answer Logic:

DNA strands run antiparallel

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Mathematics QUESTION #11148

Question 2

$\displaystyle\lim_{n\to\infty}\left(1+\frac{z}{n}\right)^n$ is:

$1$
$0$
$e^z$✔️
$e^n$

Correct Answer Logic:

This is the standard limit definition of the complex exponential: $\displaystyle\lim_{n\to\infty}\left(1+\frac{z}{n}\right)^n = e^z$ for all $z\in\mathbb{C}$. This generalises the real limit $\lim_{n\to\infty}(1+x/n)^n = e^x$ to the complex plane.

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Information Technology QUESTION #1125

Question 3

Which optimization method involves minimizing the memory access count in a program?

Constant folding
Register allocation✔️
Instruction scheduling
None of these

Correct Answer Logic:

Register allocation is the process of assigning a large number of target program variables onto a small number of CPU registers to minimize slow memory accesses.

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Nursing QUESTION #9238

Question 4

A patient develops Ventricular Fibrillation (VF) in the ICU. According to ACLS 2020 guidelines, what is the CORRECT sequence of management?

Defibrillate 360J → Amiodarone 300mg → CPR 2 min → Epinephrine 1mg
CPR 2 min → Defibrillate 200J biphasic → Epinephrine 1mg → CPR 2 min → Amiodarone if VF persists
Defibrillate immediately → CPR 2 min → Epinephrine 1mg IV → CPR 2 min → Amiodarone 300mg if VF/pVT persists✔️
Epinephrine 1mg → CPR 5 min → Defibrillate 360J → Amiodarone 150mg

Correct Answer Logic:

Correct Answer: C — ACLS VF/pulseless VT Algorithm (2020)

ACLS Shockable Rhythm (VF/pVT) Algorithm:

Defibrillate immediately (biphasic 120–200J; monophasic 360J)
CPR 2 minutes (high-quality: 100–120 compressions/min, depth $5-6 \text{ cm}$)
Check rhythm — if still VF/pVT:
Epinephrine 1 mg IV/IO every 3–5 minutes
Defibrillate again
CPR 2 minutes
If VF/pVT persists: Amiodarone 300 mg IV (second dose: 150 mg) OR Lidocaine

Key points:

Minimize interruptions in CPR (pause $< 10$ seconds for shocks)
Treat reversible causes: 5 H's and 5 T's (Hypoxia, Hypovolemia, H$^+$ acidosis, Hypo/Hyperkalemia, Hypothermia; Tension pneumothorax, Tamponade, Toxins, Thrombosis-PE, Thrombosis-coronary)
Epinephrine: given after first or second defibrillation attempt, then every 3–5 min

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Psychology QUESTION #9941

Question 5

Improved job satisfaction results in improvements in work performance and reductions in turnover.

Decrease; decrease
Increase; no change
Increase; increase
No change; decrease✔️

Correct Answer Logic:

Meta-analyses consistently show improved job satisfaction leads to increased work performance and decreased turnover. The negative relationship between satisfaction and turnover intention is among the most robust findings in I/O psychology.

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Mathematics QUESTION #6929

Question 6

Let $I=\displaystyle\int_a^b(x^4-2x^2)\,dx$. Find the ordered pair $(a,b)$ that minimises $I$.

$(0,\sqrt{2})$
$(-\sqrt{2},0)$
$(\sqrt{2},-\sqrt{2})$
$(-\sqrt{2},\sqrt{2})$✔️

Correct Answer Logic:

$x^4-2x^2=x^2(x^2-2)\leq0$ when $|x|\leq\sqrt{2}$ and $\geq0$ outside.

To minimise the integral (make it most negative), integrate over the region where the integrand is most negative — i.e., $[-\sqrt{2},\sqrt{2}]$ where the function is $\leq0$.

Any sub-interval of $[-\sqrt{2},\sqrt{2}]$ gives a more negative (or equal) value, and the widest such interval $[-\sqrt{2},\sqrt{2}]$ gives the minimum.

$(a,b)=(-\sqrt{2},\sqrt{2})$

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Chemistry QUESTION #7799

Question 7

Pyridine is an example of which class of organic compounds?

Alicyclic
Heterocyclic✔️
Homocyclic
Hydrocarbon

Correct Answer Logic:

Pyridine (C₅H₅N) has a nitrogen atom in the ring, making it heterocyclic. Homocyclic have only carbon; alicyclic are non-aromatic cyclic hydrocarbons.

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Civil Procedure QUESTION #3728

Question 8

A person intends to kill their enemy by shooting them. They point a gun and pull the trigger, but the gun misfires. Unbeknownst to the shooter, the enemy had already died of a heart attack five minutes earlier. What crime has the shooter committed?

Murder.
Attempted Murder.✔️
Manslaughter.
No crime, because you cannot kill a dead person ('Factual Impossibility').

Correct Answer Logic:

Factual impossibility (the fact that the victim is already dead) is NOT a defense to an attempt crime. The defendant had the intent to kill and took a substantial step toward the commission of the crime.

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Physics QUESTION #7298

Question 9

A particle is thrown vertically upward. Its speed at half the maximum height is $10\text{ m/s}$. The maximum height attained is ($g = 10\text{ m/s}^2$):

8 m
20 m
10 m✔️
16 m

Correct Answer Logic:

Let maximum height $= H$. At height $H/2$, velocity $= 10\text{ m/s}$.

Using $v^2 = u^2 - 2g\cdot\dfrac{H}{2}$: $100 = u^2 - gH$

At max height: $0 = u^2 - 2gH \Rightarrow u^2 = 2gH$

Substituting: $100 = 2gH - gH = gH \Rightarrow H = \dfrac{100}{10} = \mathbf{10\text{ m}}$

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Math Physics Chemistry Biology QUESTION #11243

Question 10

Which of the following is NOT a component of a nucleotide?

Nitrogenous base
Pentose sugar
Phosphate group
Amino acid✔️

Correct Answer Logic:

A nucleotide consists of three components: a nitrogenous base (purine or pyrimidine), a pentose sugar (ribose or deoxyribose), and a phosphate group. Amino acids are the building blocks of proteins, not nucleotides.

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Reading and Writing (Module-1) QUESTION #10397

Question 11

The professor's lecture was ------- , packed with so many tangents that students struggled to follow the main point.

focused
digressive✔️
concise
streamlined

Correct Answer Logic:

A lecture 'packed with tangents' is 'digressive.'

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English QUESTION #8335

Question 12

He went _______ the direction of the post office.

in✔️
at
to
on

Correct Answer Logic:

'In the direction of' is correct.

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Administration QUESTION #2944

Question 13

In the "Boston Consulting Group (BCG) Matrix," what characterizes a "Cash Cow"?

High market growth rate and high market share
Low market growth rate and high market share✔️
High market growth rate and low market share
None of these

Correct Answer Logic:

Cash cows are established products in mature markets that generate more cash than is required to maintain them.

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Education QUESTION #6769

Question 14

A teacher notices that a student's persistent academic failure is unrelated to motivation or teaching methods and suspects sensory or cognitive processing issues. Which type of educational decision, and what corresponding assessment tool, is MOST appropriate?

Grading decision; teacher-made achievement test
Diagnostic decision; specialized standardized diagnostic battery to identify root causes✔️
Placement decision; aptitude test
Selection decision; criterion-referenced test

Correct Answer Logic:

Diagnostic decisions address the causes of persistent learning difficulties — intellectual, physical, emotional, or environmental. When standard instructional remediation has failed, a diagnostic battery (not a routine achievement test) is needed to pinpoint the underlying cause. This is distinct from placement (where to put the student) or selection (whether to admit).

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Planning QUESTION #4953

Question 15

What does 'Sustainability' in planning fundamentally require?

Economic growth only
Meeting present needs without compromising future generations✔️
Maximizing resource use
Preventing all development

Correct Answer Logic:

Sustainability, as defined by the Brundtland Commission, means meeting the needs of the present generation without compromising the ability of future generations to meet their own needs.

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Academic/Professional (Social Sciences) QUESTION #10135

Question 16

If Weber's ideal type of 'value-rational action' is applied to a person who prays daily purely because they believe it is inherently right, regardless of consequences, this is best classified as:

Instrumental-rational action
Traditional action
Value-rational action✔️
Affectual action

Correct Answer Logic:

Value-rational action is pursued for its own sake, based on belief in its intrinsic value, irrespective of outcomes.

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Administration QUESTION #9544

Question 17

Maslow's Hierarchy of Needs is often misapplied in organizations. Which of the following scenarios correctly identifies a managerial error arising from misapplication of the hierarchy?

Offering performance bonuses to a newly recruited employee who lacks job security✔️
Providing a spacious office to a senior official who already has high social standing in the organization
Enrolling a motivated high-performer in a specialized professional development course to address growth needs
Forming cross-departmental committees to build team cohesion among mid-level managers

Correct Answer Logic:

Maslow's hierarchy requires that lower-level needs be satisfied before higher-level needs become motivators. Offering performance bonuses (esteem/achievement level) to someone who lacks job security (safety level) misapplies the hierarchy — the employee's dominant need is safety, so bonuses will not effectively motivate until that foundational need is met.

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Mathematics QUESTION #1318

Question 18

The eigenvalues for $X''+\lambda X=0$ with $X(0)=0$ and $X(a)=0$ are:

$\lambda_n=\dfrac{n\pi}{a}$
$\lambda_n=\dfrac{n^2\pi^2}{a^2}$ for $n=1,2,3,\ldots$✔️
$\lambda_n=\dfrac{n\pi^2}{a}$
$\lambda_n=n^2\pi^2$

Correct Answer Logic:

The general solution is $X=A\cos(\sqrt{\lambda}\,x)+B\sin(\sqrt{\lambda}\,x)$. From $X(0)=0$: $A=0$. From $X(a)=0$: $\sin(\sqrt{\lambda}\,a)=0\Rightarrow\sqrt{\lambda_n}=\dfrac{n\pi}{a}\Rightarrow\lambda_n=\dfrac{n^2\pi^2}{a^2}$, with eigenfunctions $X_n=\sin\!\left(\dfrac{n\pi x}{a}\right)$.

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HR and Management QUESTION #6441

Question 19

According to the text, ethics in HRM is described as:

Strict adherence to written company policies
The legal minimum standard of conduct
The bedrock of socially responsible behavior✔️
Optional guidelines for management discretion

Correct Answer Logic:

The text explicitly states that ethics is the bedrock of socially responsible behavior. While codes of ethics exist, managerial decisions related to HR are subject to judgment calls, and what is ethical or unethical is often open to debate except in blatant cases.

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Math Physics Chemistry Biology QUESTION #730

Question 20

Reverse process of vector addition?

Subtraction
Division
Multiplication
None✔️

Correct Answer Logic:

The reverse process of vector addition is resolution (decomposition) of vectors into components. None of the listed options correctly describes it; the answer marked is 'None'.

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