Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA

Structure of nucleic acids and replication of DNA — practice question

Fig. 2.1 illustrates a root tip cell during interphase.
(a)[3]

The nucleus has an actual diameter of $9.0\,\mu\text{m}$ between X and Y. Calculate the magnification of the plant cell shown in Fig. 2.1. State the magnification formula and use it to complete your calculation. Show your working.

(b)[3]

Describe how a nucleus is structured.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “magnification = image length / actual length” …

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI