What is the function of a ribosome?
To release energy from glucose
Involved in protein synthesis
To build sugars by photosynthesis
Which statement is true of genes?
A gene is a short section of DNA that codes for a protein
A single molecule of DNA
Humans have 46 genes
How many chromosomes does a human have in each body cell?
22 pairs
23 pairs
46 pairs
Which statement is correct about the cells produced by meiosis
Two daughter cells are produced - each has the same number of chromosomes as the parent cells
Four daughter cells are produced - each has the same number of chromosomes as the parent cells
Four daughter cells are produced - each has half the number of chromosomes as the parent cells
How many base pairs are in the human genome?
Four
20 thousand
Three billion
What molecules are used to copy DNA in protein synthesis?
Enzymes
Hormones
Growth factors
Which of these is an advantage of asexual reproduction?
It produces variation
It is quicker
It requires time to find a mate
What occurs during transcription?
A polypeptide is folded into a protein
A mRNA copy of a section of a DNA strand is made
tRNA molecules bring amino acids together
Which two scientists determined the structure of DNA?
Watson and Crick
Watson and Wilkin
Wilkins and Franklin
Which base does Uracil replace in mRNA?
Thymine
Guanine
Cytosine