Which of the following is NOT a function of the nucleus of a cell?

1. Analyze the question We are asked to find the option that is NOT a function of the nucleus. So three options are true functions of the nucleus, and one is false.

2. Explain the concept The nucleus is the control centre of the cell. Its main roles are:

• Storing hereditary information (DNA in the chromosomes)
• Controlling cell activities such as growth, metabolism and reproduction
• Directing protein synthesis, by transcribing DNA into mRNA, which then goes to the ribosomes
• Controlling cell division

Energy is released by the mitochondria (the "powerhouse" of the cell) through respiration. The nucleus does not produce or store energy for the cell.

3. Check each option

• A. "It translates genetic information for the manufacture of proteins." Strictly speaking, translation happens at the ribosomes in the cytoplasm, while the nucleus carries out transcription. However, in the JAMB context this is accepted as the nucleus directing protein synthesis through its genetic information. This wording is loose, but it is not the best answer.
• B. It stores and carries hereditary information. TRUE, since DNA is found in the nucleus.
• C. It is a reservoir of energy for the cell. FALSE. Energy is produced in the mitochondria and stored as ATP, and food reserves are stored as glycogen, starch or fat. The nucleus does none of this.
• D. It controls the life processes of the cell. TRUE, because the nucleus is the control centre.

4. Answer

5. Exam tip Link each organelle to its job:

• Nucleus = control and heredity
• Mitochondria = energy
• Ribosomes = protein synthesis
• Chloroplast = photosynthesis

If an option mentions "energy" and the organelle is not the mitochondria (or chloroplast), it is probably the odd one out.