Would it be correct to classify the biceps muscle as a tissue?The biceps muscle in the upper arm consists of striated muscle fibres bound...

The muscle is a contractile tissue composed of muscle cells!

Muscle fiber is structurally-functional unit of muscle tissue.

Brachial triceps muscle (triceps brachii) - allows the extension arm at the elbow
Brachial biceps muscle (biceps brachii) - allow bending the arm at the elbow, making the opposite move by brachial triceps muscle.

Brachial triceps muscle and brachial biceps muscle are antagonists muscle  which are participating to movements in the same direction but in opposite, one nears two bones, the other, departs.

They are muscles with multiple origins and a single terminal tendon.