Download travel cards B4

QWC Additional Travel Card
Question
Command word:
Explain – Give reasons
or mechanisms to
address how or why
something happens
Connectives:
Whereas,
alternatively, unlike,
equally, consequently,
unless, if, as long
as, however, such as,
for instance, this
means, . . .
Alex is investigating the activity of
an enzyme called salivary amylase.
The enzyme breaks down starch into
glucose, and is present in saliva in
the human mouth. Alex eats chicken
and chips for her lunch. She wonders
which parts of her lunch will start
to be digested by salivary amylase in
her mouth. She knows that chicken
meat is made of protein. Explain why
salivary amylase will start digesting
the chips in her mouth but will not
start digesting the chicken.
Value
6 marks
Route
Enzymes
QWC Additional Travel Card
Mark
band
1-2
3-4
5-6
Science Points
Success criteria
•
Answer does not talk about
specificity of the enzymes active
site for the shape of starch. Limited
use of specialist terms. SPAG weak.
Answer describes some aspects of lock
and key model. Specialist terms
mostly used correctly. Occasional
errors in SPAG.
Answer clearly describes lock and key
model and explains substrate
specificity. Few, if any, errors in
SPAG.
•
•
•
•
•
•
•
•
chips/potatoes/plants contain starch (as an
energy store)
salivary amylase has an active site
the shape of the active site complements
the shape of a starch molecule
only a starch molecule will fit into the
enzyme’s active site and form an enzymesubstrate complex
this is the ‘lock and key’ model
chicken meat is made of protein, not starch
protein will not fit into the enzyme’s
active site
and will not form an enzyme-substrate
complex
so will not be digested
Route
Enzymes
QWC Additional Travel Card
Command word:
Outline – Set out key
facts, steps or
characteristics.
Connectives:
Whereas,
alternatively, unlike,
equally, consequently,
unless, if, as long
as, however, such as,
for instance, this
means, . . .
Question
Outline the main stages
of photosynthesis and
describe what plants do
with the glucose made
in the process.
Value
6 marks
Route
Photosynthesis
QWC Additional Travel Card
Science Points
Mark
band
1-2
3-4
5-6
Success criteria
There is a brief description of
photosynthesis. Some key words but
very limited.
Poor SPAG
Clear description of photosynthesis
and at least one example of how
glucose is used. Some SPAG errors.
There is a clearly structured,
balanced and detailed description of
photosynthesis and uses of glucose.
becomes a full organism. Excellent
use of key words.
•
Photosynthesis is the process by which plants make
food/glucose
• By combining carbon dioxide from the air;
• With water obtained from the soil
• Photosynthesis takes place in the leaves;
• In structures called chloroplasts, which contain
chlorophyll
• Light is absorbed by chlorophyll
• Light is used to split water into hydrogen and
oxygen atoms.
• These atoms are rearranged/combine with carbon
dioxide
• Oxygen is produced as a by product.
Uses of glucose
• Glucose can be used by the plant for
respiration/to generate energy; for active
transport
• Glucose can be stored as starch
• Glucose can be combined with nitrates from the
soil to create proteins such as enzymes
Route
Photosynthesis
QWC Additional Travel Card
Command word:
Question
Making use of sketched
graphs, explain how
different factors can
affect the rate of
photosynthesis and
potentially be
“limiting factors”.
Explain – Give reasons
or mechanisms to address
how or why something
happens
Connectives:
Whereas, alternatively,
unlike, equally,
consequently, unless,
if, as long as, however,
such as, for instance,
this means, . . .
Value
6 marks
Route
Photosynthesis
QWC Additional Travel Card
Science Points
Mark
band
1-2
3-4
5-6
Success criteria
Names the3 factors that affect/speed up
photosynthesis. Little detail about limiting factors.
SPAG poor.
Describes all three factors that affect the rate of
photosynthesis. Explanation lacks detail or is
confused. Some SPAG errors.
Explains the term limiting factor clearly and how
all three limiting factors effect the rate of
photosynthesis. Few, if any, errors in
SPAG.
3 factors can limit the speed of photosynthesis light intensity, carbon dioxide concentration and
temperature. A limiting factor is a factor that
controls a process. For it to be a limiting
factor, there has to be a low supply of this
factor. When a limiting factor is increased, the
rate of reaction will increase until other
limiting factors limit rate.
Each factor should be explained, for temperature
the link with enzymes should be explained.
Photosynthesis is controlled by enzymes. As the
temperature increases so does the rate of
reaction, up until an optimum. After this point
the enzyme is denatured/enzyme’s active site
changes shape so no E-S complexes can form.
Route
Photosynthesis
QWC Additional Travel Card
Command word:
Compare and contrast –
What’s similar and
different?
Connectives:
Whereas, alternatively,
unlike, equally,
consequently, unless,
if, as long as, however,
such as, for instance,
this means, . . .
Question
Compare and contrast
the processes of
diffusion, osmosis and
active transport.
Value
6 marks
Route
Transport
Science Points
Mark
band
1-2
3-4
5-6
Success criteria
Brief description of one difference
or similarity. SPAG poor.
Answer includes a description of
either similarities or differences.
There is good use of specialist
terms. Some SPAG errors.
There are examples given for both
similarities and differences. Most of
the key points are included and used
accurately. Few, if any, errors in
SPAG.
Similarities:
• Both osmosis and diffusion move
molecules/particles down a concentration
gradient/high to low concentration
• Both osmosis and diffusion are passive/do
not require energy.
• Both active transport and osmosis require
a partially permeable membrane.
Differences
• Active transport is different to osmosis
and diffusion as it require energy/ATP;
it moves molecules/particles against a
concentration gradient.
• Active transport requires carrier
proteins whereas diffusion and osmosis do
not.
Route
Transport