Pearson Edexcel GCSE Biology Specification Overview 2025
/2026 ACTUAL COMPREHENSIVE MOST RECENT REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
GRADED A+!!
What is the purpose of investigating antimicrobial properties of
plants? - ANSWER-To understand how plant extracts can
inhibit microbial growth.
What is the significance of using resazurin dye in
microbiology? - ANSWER-It
helps investigate the conditions affecting the growth of
microorganisms.
What is a scatter diagram used for? - ANSWER-To identify
a correlation
between two
variables.
Why do multicellular organisms require exchange surfaces and
a transport system? - ANSWER-To efficiently exchange
substances due to their larger size and lower surface area to
volume ratio.
,How are alveoli adapted for gas exchange? - ANSWER-
Alveoli have a large
surface area, thin walls, and a rich blood supply to facilitate
diffusion of gases.
What factors affect the rate of diffusion? - ANSWER-
Surface area,
concentration gradient, and diffusion
distance.
What is Fick's law used for? - ANSWER-To calculate the rate of
diffusion based
on surface area, concentration difference, and
membrane thickness.
What is the equation for Fick's law? - ANSWER-Rate of
diffusion (surface
area × concentration difference) / diffusion
thickness.
How is the structure of red blood cells related to their function?
- ANSWER-Red
blood cells are biconcave, increasing surface area for oxygen
transport and lack
,a nucleus to maximize hemoglobin
content.
What is the function of white blood cells? - ANSWER-To protect
the body against infection; includes phagocytes that engulf
pathogens and lymphocytes that produce antibodies.
What is the role of plasma in the blood? - ANSWER-To
transport nutrients,
hormones, and waste products
throughout the body.
What are the functions of platelets in the blood? - ANSWER-
To aid in blood
clotting and prevent excessive
bleeding.
How does the structure of blood vessels relate to their
function? - ANSWER-
Arteries have thick walls to withstand high pressure; veins
have valves to
prevent backflow; capillaries are thin for
efficient exchange.
, What is the structure of the heart related to its function? -
ANSWER-The heart
has four chambers with valves to ensure unidirectional blood
flow and varying
wall thickness to manage pressure in
different circuits.
What is cellular respiration? - ANSWER-An exothermic
reaction that occurs
continuously in living cells to release energy for
metabolic processes.
What are the two types of respiration? - ANSWER-Aerobic
respiration, which
requires oxygen, and anaerobic respiration, which occurs
without oxygen.
How does aerobic respiration differ from anaerobic
respiration? - ANSWER-
Aerobic respiration produces more energy and requires
oxygen, while
anaerobic respiration produces less energy and occurs in
the absence of
oxygen.
/2026 ACTUAL COMPREHENSIVE MOST RECENT REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
GRADED A+!!
What is the purpose of investigating antimicrobial properties of
plants? - ANSWER-To understand how plant extracts can
inhibit microbial growth.
What is the significance of using resazurin dye in
microbiology? - ANSWER-It
helps investigate the conditions affecting the growth of
microorganisms.
What is a scatter diagram used for? - ANSWER-To identify
a correlation
between two
variables.
Why do multicellular organisms require exchange surfaces and
a transport system? - ANSWER-To efficiently exchange
substances due to their larger size and lower surface area to
volume ratio.
,How are alveoli adapted for gas exchange? - ANSWER-
Alveoli have a large
surface area, thin walls, and a rich blood supply to facilitate
diffusion of gases.
What factors affect the rate of diffusion? - ANSWER-
Surface area,
concentration gradient, and diffusion
distance.
What is Fick's law used for? - ANSWER-To calculate the rate of
diffusion based
on surface area, concentration difference, and
membrane thickness.
What is the equation for Fick's law? - ANSWER-Rate of
diffusion (surface
area × concentration difference) / diffusion
thickness.
How is the structure of red blood cells related to their function?
- ANSWER-Red
blood cells are biconcave, increasing surface area for oxygen
transport and lack
,a nucleus to maximize hemoglobin
content.
What is the function of white blood cells? - ANSWER-To protect
the body against infection; includes phagocytes that engulf
pathogens and lymphocytes that produce antibodies.
What is the role of plasma in the blood? - ANSWER-To
transport nutrients,
hormones, and waste products
throughout the body.
What are the functions of platelets in the blood? - ANSWER-
To aid in blood
clotting and prevent excessive
bleeding.
How does the structure of blood vessels relate to their
function? - ANSWER-
Arteries have thick walls to withstand high pressure; veins
have valves to
prevent backflow; capillaries are thin for
efficient exchange.
, What is the structure of the heart related to its function? -
ANSWER-The heart
has four chambers with valves to ensure unidirectional blood
flow and varying
wall thickness to manage pressure in
different circuits.
What is cellular respiration? - ANSWER-An exothermic
reaction that occurs
continuously in living cells to release energy for
metabolic processes.
What are the two types of respiration? - ANSWER-Aerobic
respiration, which
requires oxygen, and anaerobic respiration, which occurs
without oxygen.
How does aerobic respiration differ from anaerobic
respiration? - ANSWER-
Aerobic respiration produces more energy and requires
oxygen, while
anaerobic respiration produces less energy and occurs in
the absence of
oxygen.
