DP Biology (first assessment 2025)
Question 19M.2.HL.TZ2.18a
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.2.HL.TZ2.18a |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Describe | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
19M.2.HL.TZ2.18a
(a)
Describe the structure of cardiac muscle cells.
[2]
Markscheme
a. cardiac muscle cells are branched ✔
b. rich in mitochondria ✔
c. rich in glycogen granules ✔
d. formed by short cylindrical cells ✔
e. contains intercalated discs ✔
f. has gap junctions ✔
g. «intercalated discs are» transverse cross-bands which represent the attachment site between adjacent cells ✔
Do not accept myogenic as it is not a structure.
Examiners report
The stronger candidates could describe the structure of cardiac muscle cells.
