Biology Mock Yr1 Flashcards
Name the part of an animal cell where respiration occurs
Mithochondia
Give One advantage of using microscope to look at Cells
either one
higher magnification
higher resolution
more detail than light microscopes
What its the stage function
To place slide on
What its the stage eyepiece function
To look through to see the cells
What is the smallest unit
Picrometer
Animal with the most desirable ___________________ were bred togheter. This is called _________________ _________________
desirable charactistic
called **Selective **Breeding
What does the term “fertillsation”
Male and female gametes fuse forming a zygote forming a diploid
What does the term isotope mean
Same number of proton but different number of neurone.
How many cell division does Meiosis occur
4
How many chromosome does Meiosis have
46
What does the term meiosis mean?
Type of Cell division in sexually reproducing organisms that reduces
How many chromosome does Mitosis have
24 chromosme
How many cell division does Mitosis
2
What does the term “Mitosis” mean
a cell replicates its chromosomes and then segregates them,
Describe 2 ways that sperm cell is specialised?
1) a tail to move them towards an egg cell
2)mitochondria to provide energy.
3)an acrosome (part of the tip of the head) releases enzymes to digest the egg membrane.
Does animal cell have a cell wall?
No
What are Plant cell made up?
cell wall, cell membrane, cytoplasm, nucleus
EXTRA:
vacuole, chloroplasts ,cell wall
What are Animal cell made up?
Nucleus
Cell membrane
Mitochondria
Cytoplasm
What Made up a bacteria cell made up?
cell wall, cell membrane, cytoplasm, nuclear material, ribosome, plasmid
risk of developing cardiovascular diseases(heart disease)
reduce alcohol intake
physical inactivity and poor nutrition
give 1 advantages of domesticating animal
give human protection
food security
animal are less dangerous
companionship
make job easier
Name 2 treatment for cardiovascular disease
bypass surgery
medication
what does the term cancer mean
uncontrolled cell division
state one possible cause of genetic variation in apple tree
mutation
sexual reproduction
different combination of alleles can occur
Name the type of reproduction that produces genetically identical organism
asexual or
asexual reproduction
State 2 reasons for the change of people smokers cigarettes
People are aware of the danger of smoking
smoking cigarette is expensive
State one adv and dis of growing genetically identical apple tree
adv
1) can be produce quicker
2) fruit will have desired qualities
dis
1) reduce gene pool
2) cannot survive environmental change
Explain why antibiotic can be used to treat bacterial information?
They inhibit process(1) so bacteria are killed and stops reproduction (1) Does not affect/damage to host cell
What does the term “Pathogen” mean?
They are organism that cause disease.
What’s the differences between Plant cell and bacteria?
Similarities
cell wall
cell membrane
both have DNA
ribosome
Differences
plasmid(BACTERIA)
smaller size(BACTERIA)
Chloroplast(PLANT)
vacuole(PLANT)
How is cholera spread?
In water
How is malaria spread?
By animal vector
How was Tool P made?
by hitting it with another stone / knocks flakes or chip off.
Evolution is the change of inherited characteristic thought ___________ selection
These changes occurs because genes ___________.
1) thought natural
2) gene.. mutate
Describe 2 ways that stone tools and fossils can be dated to find how old they are?
1) Compare with other tools/fossil that are already outdated
2) Layer of rock which found
3) Layer of rock how deep down each are found
4) Radiometric dating
Which process moves alcohol from blood into the liver
Diffusion
State 2 piece of health advice for people about drinking alcohol
Reduce alcohol intake
Drink alcohol with meals
State One genre are found in cell?
In chromosome /Nuclease
what’s a genotype
When a punnet square is expressed in 2 lower case letter example “ff”
State one chlamydia can be describe as a communicable diseases
passed/spread from person to person
or
caused by bacteria
Explain why the enzymes protease was added to the mixture
Protease break down protein in cell membrane(1)Destroy enzymes that may break down the DNA(1)
Give one way transmission of chlamydia can be prevented
avoid sexual contact
use condom/femidom
treat the infection
screen people for infection
These student wanted to compare the mass of DNA found in fresh peas with the mass of the DNA found in fresh beans
Give 2 variable the student would need to control to make a valid comprassion?
- Mass of peas and bean
- Method of crushing
- Volume of washing up liquid detergent/water
-Temperature if qualified
-Volume of ethanol
-Time if qualified
State Why ice-cold ethanol was poured with the filtration
To precipate the DNA because DNA in insoluble in ethanol
Explain why chlamydia can be treated with antibodies?
Chlamydia is a bacterial infection, so you need to take antibiotics to cure it
State how percentile charts are used?
Monition height/growth overtime
compare growth of an individual against the standard growth pattern
What are the code for the complementary DNA stand
A-T-C-G
(Expressed using capital letter only)
What’s the maximum number of amino acid coded for by this stand of DNA
4
What’s the shape of a DNA molecule
Double helix structure
Which term describe the area of a root where may cells are dividing by mitosis?
meristem
How do you devise a plan to investigate the effect of pH activity of this enezymes
1) add enzymes solution / plant root cell to glucose
2) test to presence starch
3) test every min until a positive result for starch
4) repeat at more than one pH of difference pH values
5) Same volume of solution and same temperature
Describe how the base pairs are bonded together in a DNA molecule.
hydrogen bond
weak
complementary base
A - T - G - C
