Transcript travel cards B5

QWC Additional Travel Card
Question
Command word:
Explain – Give reasons
or mechanisms to
address how or why
something happens
Animal clones occur naturally. It is
Connectives:
contain embryonic stem cells.
Whereas,
alternatively, unlike,
equally, consequently,
unless, if, as long
as, however, such as,
for instance, this
means, . . .
Value
6 marks
now possible to produce animal clone
artificially. The embryos produced
Explain how an adult body cell can be
used to produce a cloned embryo and
suggest the possible uses of this
technique.
Route
Stem cells
QWC Additional Travel Card
Mark
band
1-2
3-4
5-6
Success criteria
Science Points
Describes cloning process but sequence
is poorly understood, steps/terms are
missing. Candidate may suggest a use
for the cloned embryos. SPAG weak
Describes cloning process without
misuse of terms such as nucleus, egg
cell, but description is incomplete /
confused. Candidate suggests a use for
cloned embryos. Variable SPAG.
Describes cloning with correct science
and with a logical sequence. Candidate
suggests more than one use for cloned
embryos, or suggests and develops one
use for cloned embryos. Excellent SPAG
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egg cell removed from female
nucleus removed from egg cell
nucleus taken from adult body cell which is to
be cloned
inserted into the unfertilised empty egg cell
cells divide to form embryo
electric shock [or other stimulus] applied to
trigger cell division (not in Spec) either
in vitro growth of embryo or implantation in
suitable female
embryos are a source of embryonic stem cells
stem cells can be used to treat disease
this is because they are unspecialised
may be used to clone e.g. endangered species,
valuable stock or sporting animals
Route
Stem cells
QWC Additional Travel Card
Question
Command word:
Explain – Give reasons
or mechanisms to
address how or why
something happens
Myosin is a protein that is found in
Connectives:
Explain the processes that lead to
Whereas,
alternatively, unlike,
equally, consequently,
unless, if, as long
as, however, such as,
for instance, this
means, . . .
myosin being made and why it is only
Value
6 marks
muscle cells but not in nerve cells.
produced in muscle cells.
Route
Protein Synthesis/ Gene switching
QWC Additional Travel Card
Mark
band
Success criteria
1-2
Mentions amino acids/ bases/ DNA / RNA/
genes AND an extra aspect. SPAG weak
information stored in nucleus / within the DNA /
/ base sequence in nucleus is copied
3-4
Discusses amino acids/ bases/ DNA / RNA
in an appropriate fashion, and
appreciates that there is a
code/instruction set and gives further
detail. Good use of specialist terms,
some may not be used. SPAG is generally
good.
5-6
Shows a grasp of all the aspects
underlined by discussing switching of
genes, links protein to amino acids/
bases/ DNA / RNA. Faultless SPAG
Science Points
Nucleus
sequence of bases / code for order of amino acids
Transport of information copied information goes
to cytoplasm / where protein is assembled / using
mRNA / different proteins are made from different
sequences of amino acids
Switching
muscle and nerve cells have same genes
/ but specialised cells have only some genes
switched on / nerve cells do not have gene for
myosin switched on / muscle cells do have gene
for myosin switched on
Route
Protein Synthesis/ Gene switching
QWC Additional Travel Card
Question
Command word:
Describe - Set out
facts or
characteristics.
What/when/where.
Tony takes a cutting from a tree.
Connectives:
Describe the processes that will
Value
6 marks
He dips the cutting into a powder.
Whereas,
alternatively, unlike,
equally, consequently,
unless, if, as long
as, however, such as,
for instance, this
means, . . .
help the cutting develop into a
new, identical tree.
Route
Growth and development
QWC Additional Travel Card
Mark
band
1-2
3-4
5-6
Success criteria
Response refers only to the
process or to the change in cells
to form specialised tissues.
Variable SPAG.
Description of the process may be
jumbled or miss some detail. There
is good use of specialist terms,
some may not be used. SPAG is
good.
Clear description of the processes
involved with the powder and the
reason for being identical, in the
correct order. Faultless SPA.G
Science Points
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cutting includes meristems
meristems are a source of unspecialised
cells
powder contains plant hormone
powder causes unspecialised cells to
develop into roots/helps cells develop
(unspecialised cells develop) into new
tissues/organs
cutting is a clone
because it has identical genes/DNA/cells
as the parent
discusses the growing conditions needed
to make the clone identical to the
original accept references to named new
tissues e.g. phloem, xylem accept
references to named new organs e.g.
leaves/needles
Route
Growth and development
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, . . .
Value
6 marks
Joe puts a glass jar containing a
bean seedling next to a window.
After several days he notices that
the tip of the seedling stem has
grown towards the window.
Explain how the seedling stem
grows towards the light coming
through the window.
Route
Phototropism
QWC Additional Travel Card
Mark
band
Science Points
Success criteria
1-2
Answer refers to phototropism
and/or diffusion of auxin but
without describing the details
correctly. SPAG weak.
3-4
Answer may correctly identify
some aspects of auxin activity at
the shoot tip under conditions of
directional light .SPAG good.
5-6
Answer correctly describes the
production, distribution and
effect of auxin at the shoot tip
under conditions of directional
light. Excellent SPAG.
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auxin is produced by the tip of the stem
auxin diffuses down into the lower
tissues of the stem (strong)
directional light causes the auxin to
diffuse towards the darker side of the
stem
• auxin promotes cell division/growth
• higher auxin concentration on the darker
side of the stem increases the
division/growth rate on this side
• more/faster division/growth on the
darker side produces a stem that is
curved towards the directional light
source
• this is phototropism
*****Ignore references to the shoot
“bending” towards the light without this
being linked to growth
Route
Phototropism
QWC Additional Travel Card
Question
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, . . .
Value
6 marks
A fertilised egg is called a
zygote. A zygote is a single cell.
A zygote develops into an adult
made of many hundreds of different
types of cells.
Outline in detail how a human
zygote changed into an adult
person.
Route
Growth and development
QWC Additional Travel Card
Mark
band
1-2
3-4
5-6
Success criteria
A brief description of how the
zygote becomes a human. Some
key words but very limited.
Poor SPAG.
Clear description including at
least 3-4 points. of how
zygote becomes a human.
Variable SPAG.
A clearly structured, balanced
and detailed description of
how the zygote becomes a full
organism. Excellent SPAG.
Science Points
•The zygote divides by mitosis to produce 2
identical cells.
•Cell division continues to make 4, 8 and 16 cells.
•At the 8 cell stage the cells start to specialise.
•This happens when some genes are switched off.
•Only genes needed for the cells function will stay
switched on.
•Genes code for proteins. For example the gene for
amylase would stay switched on in salivary gland
cells. (or other example)
•Groups of cells are called tissues.
•Tissues can be grouped together and organised into
organs that do a specific job. Organs work together
to become systems and organisms.
•Examples of cellular organisation (muscle cellmuscle tissue-heart-cardiovascular system-human
adult organism)
Route
Growth and development