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It is reasonable to state that A - VCE - SSCE Biology - Question 2 - 2020 - Paper 1
Question 2
It is reasonable to state that A. diagram 1 could represent carbon dioxide exiting a leaf cell during photosynthesis. B. diagram 2 could show facilitated diffusion o... show full transcript
Worked Solution & Example Answer:It is reasonable to state that A - VCE - SSCE Biology - Question 2 - 2020 - Paper 1
Step 1
A. diagram 1 could represent carbon dioxide exiting a leaf cell during photosynthesis.
Answer
This statement is incorrect. During photosynthesis, carbon dioxide enters the leaf cells rather than exiting them. The process typically involves the intake of carbon dioxide from the atmosphere into the chloroplasts where photosynthesis occurs.
Step 2
B. diagram 2 could show facilitated diffusion of urea out of an active muscle cell.
Answer
This statement is not accurate. Urea is generally a byproduct of protein metabolism and is removed from cells primarily through active transport or excretion rather than facilitated diffusion. Therefore, this statement lacks supporting biological evidence.
Step 3
C. diagram 3 could represent pumping potassium ions into a cell.
Answer
This statement is correct because potassium ions are often actively transported into cells against their concentration gradient. This process is vital for maintaining cellular function and is usually mediated by the sodium-potassium pump.
Step 4
D. diagram 4 could represent oxygen diffusing into a blood cell.
Answer
This statement is valid. Oxygen diffusion into blood cells, specifically red blood cells, is a key process in respiration, allowing oxygen to be transported throughout the body. This diffusion occurs due to the concentration gradient of oxygen between the alveoli in the lungs and the blood.