Cells & Growth
DNA
Evolution
Health and Disease
Random
100
Apart from having a tail for movement, give another way a sperm cells is adapted to its function.
acrosome / enzymes / lots of mitochondria / haploid / only 23 chromosomes.
100
Where in a cell do you find "genes"?
In the nucleus / on a chromosome / on DNA
100
How did ancient humans make stone tools?
By hitting them with something hard to knock bits off.
100
What do we call organisms that cause disease?
Pathogens
100
What are "percentile growth charts" used for?
To check that a baby / child is growing ok. / To track height / mass over time.
200
In humans, how many chromosomes are in each daughter cell produced by mitosis?
46 (23 pairs)
200
What shape is a DNA molecule?
Double helix
200
Which of these is likely to be the oldest?
200
What do we call diseases that can be spread from person to person?
Communicable diseases
200
By which process do substances move into cells down a concentration gradient? (from a high to low concentration)
diffusion
300
In humans, how many chromosomes are in each daughter cell after meiosis has occurred?
23
300
What would be the code for the complimentary strand of this piece of DNA?
GTA CTC ATC
CAT GAG TAG
300
If a stone tool was dug out of the ground, how could we work out the age of the tool?
Find the age of the layer of rocks that it was found in / From how deep it was buried / By comparing it to other tools that we know the age of.
300
What type of diseases can be treated with antibiotics?
Those that are caused by bacteria
300
Which substance is used to test for the presence of starch?
Iodine
400
In a plant, what do we call the part of the shoot and root that contains many cells undergoing mitosis?
meristem
400
When extracting DNA, what is used to precipitate the DNA?
(ice cold) ethanol
400
What do we call the change in the sequence of the DNA code that can lead to variation within a population?
mutation
400
How is cholera spread?
Through drinking water
400
What is the difference between: mode; median and mean averages?
mode - the most common
median - the middle one
mean - add them together and divide by how many you have
500
How many daughter cells are produced by:
a) mitosis? b) meiosis?
a) mitosis = 2
b) meiosis = 4
500
When extracting DNA, what is used to break down proteins in the cell membranes?
protease (enzyme)
500
Through which process have organisms evolved over millions of years?
Natural selection
500
What are "memory lymphocytes"?
White blood cells that remain in the blood after an infection, so that if there is a secondary infection the immune response is much quicker.
500
What word do we use to describe the combination of alleles that someone has, eg BB or Bb?
genotype