BIOLOGY AQA AS LEVEL 7 401/1 PAPER 1 EXAM
QUESTIONS WITH CORRECT ANSWERS
2026/2027 LATEST UPDATE
In the cell wall, bonds hold the cellulose molecules
together side by side. Name that bond - ANS✔✔---
Hydrogen
Name the products of the hydrolysis of sucrose. -
ANS✔✔--- glucose and fructose
Describe how giving this vaccine leads to production of
antibody against HPV - ANS✔✔---- Vaccine contains
HPV antigen
- Displayed on antigen-presenting cells
- Specific helper T cell (detects antigen and) stimulates
specific B cell
-B cell divides to give plasma cells
, -B cell/plasma cell produces antibody
Describe the induced-fit model of enzyme action -
ANS✔✔---- active site not complementary to/does not
fit substrate
- Shape of active site changes as enzyme- substrate
complex forms
- Distorting bonds (in substrate leading to reaction
Give two ways doctors could use base sequences to
compare different types of HPV. - ANS✔✔----
Compare (base sequences of) DNA
- Look for mutations (that change the base sequence)
- Compare (base sequences of) (m)RNA
Chromosomes line up on the equator of the mitotic
spindle in the... - ANS✔✔---Metaphase
Describe the difference between the structure of a
triglyceride molecule and the - ANS✔✔---In
phospholipid, one fatty acid replaced by a phosphate
QUESTIONS WITH CORRECT ANSWERS
2026/2027 LATEST UPDATE
In the cell wall, bonds hold the cellulose molecules
together side by side. Name that bond - ANS✔✔---
Hydrogen
Name the products of the hydrolysis of sucrose. -
ANS✔✔--- glucose and fructose
Describe how giving this vaccine leads to production of
antibody against HPV - ANS✔✔---- Vaccine contains
HPV antigen
- Displayed on antigen-presenting cells
- Specific helper T cell (detects antigen and) stimulates
specific B cell
-B cell divides to give plasma cells
, -B cell/plasma cell produces antibody
Describe the induced-fit model of enzyme action -
ANS✔✔---- active site not complementary to/does not
fit substrate
- Shape of active site changes as enzyme- substrate
complex forms
- Distorting bonds (in substrate leading to reaction
Give two ways doctors could use base sequences to
compare different types of HPV. - ANS✔✔----
Compare (base sequences of) DNA
- Look for mutations (that change the base sequence)
- Compare (base sequences of) (m)RNA
Chromosomes line up on the equator of the mitotic
spindle in the... - ANS✔✔---Metaphase
Describe the difference between the structure of a
triglyceride molecule and the - ANS✔✔---In
phospholipid, one fatty acid replaced by a phosphate
