A-LevelBiologyTransport in plants9700/12 · Feb/Mar 2017 · Q281 Mark

Which combination of features is characteristic of a phloem sieve tube element as it unloads into a sink? [Table 28.1]

Ahigher than sink absent

Bhigher than sink present

Clower than sink absent

Dlower than sink present

✓ Correct answer

A: higher than sink absent

Oracle Prep sorts past-paper questions by topic, so you can drill Transport in plants and see which topics are most likely to come up next.

Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2017 Paper 1 Variant 2, question 28.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Which statement about the role of co-transporter proteins in the movement of sucrose is correct?

Why does an air bubble in a xylem vessel element stop the flow of water? 1 loss of adhesion 2 loss of cohesion 3 coll…

Which feature of some xerophytic leaves reduces the rate of transpiration by decreasing the water potential gradient …

Emphysema is a type of chronic obstructive pulmonary disease (COPD). A person with emphysema has difficulties in brea…

Which factors contribute to outbreaks of measles after natural disasters? 1 contamination of drinking water with unt…

There are two main classes of antibiotics, broad spectrum and narrow spectrum. Broad spectrum antibiotics affect a w…