Question

There is a restriction endonuclease called ecori. What does the "Co" part in it stands for?

• A. coli
• B. colon
• C. coelom
• D. coenzyme

Answer 1

The correct option is A

coli

The correct option is A.

Explanation of the correct option:

1. The restriction endonuclease is an enzyme that cuts DNA at or near restriction sites, which have unique recognition nucleotide sequences.
2. The restriction enzyme's name is derived from the source and sequence number of manufacture, as well as the names of the laboratories where it was created.
3. The letter 'co' stands for coli in EcoRI (species of bacteria, from where it is obtained).

Explanation of the incorrect options:

Option B:

1. The colon, rectum, and anus are all parts of the large intestine.
2. As food approaches the finish of its journey through the digestive system, one long tube continues from the small intestine.

Option C:

1. The coelom is a fluid-filled bodily chamber located between the alimentary canal and the body wall.
2. The real coelom is derived from the mesoderm.
3. Many living creatures have a coelom, which is a hollow, fluid-filled cavity that serves as a protective cushion for their internal organs.
4. The coelom serves as a skeleton in some creatures, such as worms.

Option D:

1. Many enzymes need coenzymes to catalyze their reactions.
2. They are often vitamins or vitamin derivatives.
3. They can operate as catalysts in the absence of enzymes, although not as effective as when combined with an enzyme.

Final answer: The "Co" part in it stands for coli.