Explanation

• Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes.
  • Occurs during prophase I of meiosis.
  • Increases genetic variation in gametes.
  • Ensures diverse traits in offspring.
  • Essential for evolution and natural selection.

Last verified on 06-02-2026

Explanation

• Definition: Process where mRNA sequence is decoded to make a protein
• Location: Ribosomes in cytoplasm (or rough ER in eukaryotes)
• Inputs: mRNA, tRNA, amino acids, ribosomes
• Steps: Initiation → Elongation → Termination
• Outcome: Polypeptide chain (protein) is formed according to mRNA code

Last verified on 05-02-2026

Explanation

• A virion is the fully developed, infectious form of a virus capable of infecting a host.
• It contains genetic material (DNA or RNA) and a protein coat (capsid), sometimes with an envelope.
  

Additional information:

• Capsomere: Protein subunit of the capsid.
• Envelope: Lipid layer around some viruses.
• Prion: Infectious protein.

Last verified on 19-01-2026

Explanation

- Resistivity (ρ) is a measure of how strongly a material opposes the flow of electric current.

- The reciprocal of resistivity is called conductivity (σ).

Mathematically:  

σ = 1 / ρ

- Conductivity indicates how easily a material allows the flow of electric current.

- The other options:  

  - Impedance relates to resistance and reactance in AC circuits.  

  - Admittance is the reciprocal of impedance.  

  - Resistance is the opposition to current flow but depends on dimensions, unlike resistivity.

Explanation

The SI unit of electric charge is the coulomb, represented by the symbol C.

One coulomb is the amount of charge that passes through a conductor carrying one ampere of current for one second.

It's also equal to the charge of about 6.24 quintillion electrons or protons.

Explanation

Let's analyze the sequence:15, 14, 12, 9,?

The pattern seems to involve subtracting decreasing amounts:

15−1=14

14−2=12

12−3=9

Following this pattern, the next subtraction should be:

9−4=5

Thus, the missing term is 5.

Explanation

In a normal 28-day menstrual cycle, you would expect the LH surge to occur between Days 11-14.

This surge triggers ovulation, which typically happens around day 14. 

The luteinizing hormone (LH) surge occurs around the midpoint of the cycle, which is day 14 for a 28-day cycle.

Explanation

It rained all night; as a result, the roads were flooded in the morning.

The first clause says it rained all night, and the second clause says the roads were flooded.

The flooding happened because it rained all night, so the second clause is a consequence of the first.

Explanation

The correct word is explanation.

So the sentence should be:  

The manager accepted the cashier’s explanation for being late.

Explanation

The board of directors expressed their disappointment with the financial results

- Board of directors is a collective noun representing a group of people.  

- When talking about a group acting as individuals, we use a plural possessive pronoun.  

- Since the board consists of multiple directors, "their" is appropriate.