Acids and Bases
What do acids taste like?
Sour
How many electrons has O2- stolen?
2
What two key words must you include in any rate of reaction question?
Particles collide
What is an allele?
An alternative form of a gene
What is the genotype of a homozygous recessive white mouse? (B-black fur is dominant)
bb
acid + base -> salt + _________
Water
What is this? OH-
Hydroxide
Why does a powder react faster than a lump?
More surface area = more exposed particles to collide
What is a gene?
A section of DNA which codes for a trait/protein
If black fur (B) is dominant, what possible genotypes could a black rat have?
BB or Bb
I put blue litmus in a mystery solution and it stayed blue. What can I conclude?
It's either a base OR neutral - will need to use red litmus as well to be sure.
Give the ionic compound of K+ and NO3-
KNO3
How does increasing concentration increase the rate of a reaction?
More active particles per given volume = more collisions per second
What is a mutation?
A permanent change in the DNA
Why do genotypes show two letters?
One from each parent
What colour changes will you see (in order) if you put universal indicator in sodium hydroxide and add sulphuric acid until it is neutralised?
Purple - Blue - Green
What is an ion?
An atom that has gained or lost electrons to have a complete outer shell for stability
What is a catalyst?
Something which lowers the activation energy of a reaction, leading to more successful collisions
Give the code produced when this piece of template DNA undergoes replication:
CGGAT
GCCTA
Two black rats have a white baby rat. Is black fur dominant or recessive?
Dominant (or they couldn't have a baby that looked different)
Universal indicator is added to two clear solutions. One turns red, the other turns yellow. Compare the ions in the solutions.
The red one has LOADS of hydrogen ions H+ in excess, while the yellow has a few more H+ than OH-
Give the ionic compound of Fe3+ and CO32-
Fe2(CO3)3
What are the two ways increasing temperature increases the rate of a reaction?
More energy = more successful collisions
Moving faster = more frequent collisions
Which two processes in meiosis make gametes unique?
Independent assortment (random lining up of homologous chromosomes on either side of equator) and crossing over (swapping genes between homologous chromosomes)
Give the phenotype ratio of the offspring of two heterozygous black rats (Bb x Bb)
3 black: 1 white