Question

Concanavalin A is:(1) an alkaloid (2) an essential oil (3) a lectin (4) a pigment

• A. an alkaloid
• B. an essential oil
• C. a lectin
• D. a pigment

Answer 1

The Correct Option is C

To solve the given question, we need to determine the correct category for Concanavalin A from the provided options. Let's analyze each option:

1. An alkaloid: Alkaloids are naturally occurring compounds primarily found in plants and contain basic nitrogen atoms. Common examples include morphine, quinine, and nicotine. Concanavalin A is not an alkaloid.
2. An essential oil: Essential oils are concentrated hydrophobic liquids containing volatile chemical compounds from plants. They are typically used in aromatherapy and perfumery. Concanavalin A is not an essential oil.
3. A lectin: Lectins are a type of protein that specifically binds to certain sugars and play a role in biological recognition phenomena involving cells and proteins. Concanavalin A is a well-known lectin that binds specifically to certain structures containing glucose or mannose residues.
4. A pigment: Pigments are substances that impart color to other materials and are used in a variety of applications like paintings, inks, and textiles. Concanavalin A is not a pigment.

From the analysis, option (3) "a lectin" is the correct answer. Concanavalin A is widely used in biochemical and cell biology research for its ability to bind specifically to sugars, which is characteristic of lectins.

Thus, the correct answer is a lectin.