Which of the following structures represents a ribonucleoside?

Which pair of vitamins contains sulfur as a structural component?

Categorize the following processes as Anabolic or Catabolic:
$I -$ Protein synthesis,
$II -$ Lactic acid fermentation,
$III -$ Aerobic respiration,
$IV -$ Alcoholic fermentation,
$V -$ Synthesis of cholesterol from acetic acid,
$VI -$ Photosynthesis,
$VII -$ Digestion,
Identify the Anabolic and Catabolic processes respectively.

The provided image shows chemical structures related to resonance and electronic effects. Identify the correct relationship or description for these structures.

Statement $X$: Energy transformation always occurs in the metabolism of living organisms.
Reason $Y$: Living organisms continuously obtain energy from food.

Identify the odd one out.