Identify the tetrasaccharide from the following.

Glycogen is

What is the number of $-OH$ groups present in one molecule of ribose?

Match List-$I$ with List-$II$ for the following reaction pattern:
Glucose $\xrightarrow{\text{Reagent}}$ Product $\longrightarrow$ Structural prediction

List-$I$ (Reagents)	List-$II$ (Structural prediction)
$a$. Acetic anhydride	$i$. Glucose has an aldehyde group
$b$. Bromine water	$ii$. Glucose has a straight chain of six carbon atoms
$c$. Hydroiodic acid	$iii$. Glucose has five hydroxyl groups
$d$. Hydrogen cyanide	$iv$. Glucose has a carbonyl group

Choose the correct answer from the options given below.

Which one of the statements concerning the equilibrium shown is true?

At which carbon atom do $\alpha-$ and $\beta-$ glucose differ in the configuration of the $-OH$ group?