Biomolecules — BIOLOGY STD 11 Science — Question

Deficiency of nitrogen in plants induces stems, petioles and lower leaf surface of plants to get purplish in appearance. Analyse the statement and the reason behind the fact.

Define endomembrane system.

Sarcolemma, sarcoplasm and sarcoplasmic reticulum refer to a particular type of cell in our body. Which is this cell and to what parts of that cell do these names refer to?

Name the types of axon.

A ring of 6-8 blind tubules is present at the junction of foregut and midgut of cockroach. Name the ring and write its function.

Write the floral fromula of onion plant. Draw its floral diagram. Give the nature of gynoecium of its flower.

What are dyads?

Which hormone is released in the early stages of pregnancy from a woman's urine used for pregnancy tests?

Define inflorescence.

Mark the odd one in the following group. Adenosine, uridine, guanosine, cytosine.