Which of the following structures represents a ribonucleoside?

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.

How much energy is liberated when $25$ $ATP$ molecules are hydrolysed to $ADP$ (in $\text{ Kcal}$)?

Select the correct option for the following matches:

$(1)$ Carbohydrate	$(a)$ Ester bond
$(2)$ Lipid	$(b)$ Glycosidic bond
$(3)$ Protein	$(c)$ Phosphodiester bond
$(4)$ Nucleic acid	$(d)$ Peptide bond

At what temperature is the density of water maximum (in $^\circ \text{C}$)?

What is the number of covalent bonds and hydrogen bonds in a single molecule of water,respectively?