In organic compounds,the primary chemical bonds are formed between which atoms?

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

In what form does water exist in the protoplasm?

Which of the following are nitrogenous organic compounds?

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.

Select the correct combination for Column $X$,Column $Y$,and Column $Z$:

Column $X$	Column $Y$	Column $Z$
$(1)$ Dark reaction of photosynthesis	$(A)$ Galactose	$(P)$ Ketohexose
$(2)$ Structure of $DNA$	$(B)$ Fructose	$(Q)$ Aldopentose
$(3)$ Fruit juice	$(C)$ $PGAL$	$(R)$ Aldohexose
$(4)$ Digestion of milk	$(D)$ $C_5H_{10}O_4$	$(S)$ Aldotriose