BIOLOGY PAPER 1 COMPREHENSIVE EXAM
PAPER TEST BANK FULL SOLUTION UPDATED
2026 WITH 100% CORRECT ANSWERS
◉1.2)Describe how energy for the photosynthesis reaction is gained by
plants ?-[2marks] . Answer: The light is absorbed by chlorophyll
◉1.3) Calculate mean value X? [2 mark] . Answer: (18.5 + 19.3 +
19.5)/ 3 = 19.1 cm³/hour
◉1.4) draw a ring around the anomalous result in table 1. [1 mark] .
Answer: A ring around 14.2
◉1.5) suggest one possible cause of the anomalous result[1 mark] .
Answer: Measurements aren't correct
◉1.6) How did the students deal with the anomalous results? [1 mark] .
Answer: They Didn't include it in their calculations
◉1.7) Give one factor the students should have kept constant in this
investigation. [1 mark] . Answer: Light intensity/ CO2 or pondweed size
, ◉1.8) Why did the rate of photosynthesis decrease from 35*C to 45*C
?[1 mark] . Answer: The enzyme started to denature. Or enzyme was
destroyed
◉1.9) complete graph[5 marks] . Answer: Y axis - rate of
photosynthesis in cm³/hour
◉2.1)What is diffusion?[2 marks] . Answer: The movement of particles
from an area of high concentration to an area of low concentration.
◉2.2)Which two changes will increase the rate at which carbon dioxide
diffuses into the mesophyll cells ?
Tick 2 boxes [2 marks] . Answer: -increased carbon dioxide
concentration in the air .
-increased number of stomata that are open .
(3rd/4th) box
◉2.3)explain how the human lungs are adapted for efficient exchange of
gasses by diffusion?[6 marks] . Answer: -The lungs are made up of tiny
sacs called alveoli which presents a very large surface area for gas
exchange.
- The lungs are well supplied with blood due to lots of capillaries
covering the alveoli, constantly maintaining a large diffusion gradient,
PAPER TEST BANK FULL SOLUTION UPDATED
2026 WITH 100% CORRECT ANSWERS
◉1.2)Describe how energy for the photosynthesis reaction is gained by
plants ?-[2marks] . Answer: The light is absorbed by chlorophyll
◉1.3) Calculate mean value X? [2 mark] . Answer: (18.5 + 19.3 +
19.5)/ 3 = 19.1 cm³/hour
◉1.4) draw a ring around the anomalous result in table 1. [1 mark] .
Answer: A ring around 14.2
◉1.5) suggest one possible cause of the anomalous result[1 mark] .
Answer: Measurements aren't correct
◉1.6) How did the students deal with the anomalous results? [1 mark] .
Answer: They Didn't include it in their calculations
◉1.7) Give one factor the students should have kept constant in this
investigation. [1 mark] . Answer: Light intensity/ CO2 or pondweed size
, ◉1.8) Why did the rate of photosynthesis decrease from 35*C to 45*C
?[1 mark] . Answer: The enzyme started to denature. Or enzyme was
destroyed
◉1.9) complete graph[5 marks] . Answer: Y axis - rate of
photosynthesis in cm³/hour
◉2.1)What is diffusion?[2 marks] . Answer: The movement of particles
from an area of high concentration to an area of low concentration.
◉2.2)Which two changes will increase the rate at which carbon dioxide
diffuses into the mesophyll cells ?
Tick 2 boxes [2 marks] . Answer: -increased carbon dioxide
concentration in the air .
-increased number of stomata that are open .
(3rd/4th) box
◉2.3)explain how the human lungs are adapted for efficient exchange of
gasses by diffusion?[6 marks] . Answer: -The lungs are made up of tiny
sacs called alveoli which presents a very large surface area for gas
exchange.
- The lungs are well supplied with blood due to lots of capillaries
covering the alveoli, constantly maintaining a large diffusion gradient,
