Cells & Growth
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.
Where in a cell do you find "genes"?
In the nucleus / on a chromosome / on DNA
Why would a doctor give you antibiotics?
If you have a bacterial infection
What do we call organisms that cause disease?
Pathogens
What are "percentile growth charts" used for?
To check that a baby / child is growing ok. / To track height / mass over time.
In humans, how many chromosomes are in each daughter cell produced by mitosis?
46 (23 pairs)
What shape is a DNA molecule?
Double helix
Which Pathogen do antibiotics kill?
Bacteria
What do we call diseases that can be spread from person to person?
Communicable diseases
By which process do substances move into cells down a concentration gradient? (from a high to low concentration)
diffusion
In humans, how many chromosomes are in each daughter cell after meiosis has occurred?
23
What would be the code for the complimentary strand of this piece of DNA?
GTA CTC ATC
CAT GAG TAG
Which one of these diseases could you be given antibiotics to treat: Flu, Cholera, Chicken Pox or Athletes foot.
Cholera
What type of diseases can be treated with antibiotics?
Those that are caused by bacteria
Which substance is used to test for the presence of starch?
Iodine
What type of cell is undifferentiated (can become any other type of cell)?
Stem cell
When extracting DNA, what is used to precipitate the DNA?
(ice cold) ethanol
Why can not finishing a course of antibiotics lead to further illness?
Not all the bacteria have been killed so some have been left to reproduce and make you ill again.
How is cholera spread?
Through drinking water
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
How many daughter cells are produced by:
a) mitosis? b) meiosis?
a) mitosis = 2
b) meiosis = 4
When extracting DNA, what is used to break down proteins in the cell membranes?
protease (enzyme)
How have drug resistant strains of bacteria developed?
Stronger bacteria have evolved from people not finishing antibiotics and having the strongest survive and reproduce (Natural selection)
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.
What name is given to the area of an enzyme where reactions take place?
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