Worksheets3.1 Genes
Total questions: 24
Worksheet time: 39mins
What determines the genomic size of a species?
The total amount of DNA
The total number of genes
The total number of alleles
The total number of chromosomes
What is the cause of sickle-cell anemia?
A change to the base sequence of a hemoglobin gene
Mosquitos acting as the vector for malaria
Iron deficiency due to the malaria parasite
Production of more white blood cells than red blood cells by bone marrow
Which of the following is the cause of sickle-cell anemia?
Tryptophan is replaced by leucine
Leucine is replaced by valine
Glutamic acid is replaced by valine
Lysine is replaced by glutamic acid
What distinguishes an allele from a gene?
An allele is made of RNA
An allele is shorter
An allele is a variety of a gene
An allele cannot be transferred during genetic modification
Which statement correctly describes genome and proteome?
Only the genome but not the proteome can be analysed using gel electrophoresis.
The genome and the proteome are the same in all tissues in an organism.
In cells of different tissues, the genome is the same while the proteome varies.
Only mutations in the proteome but not in the genome cause any variability
A genome is.....
the total of all the genetic information an organism has
the number of chromosomes an organism has
the mechanism by which an individual passes on genetic information
a small garden statue belonging to a frenchman
True or false, the number of genes is determined by the complexity of the organism?
Each gene occupies a specific position on a specific chromosome, this position is referred to as....
the locus
the centromere
the allele
the proteome
Which molecules make up a eukaryotic chromosome?
DNA & RNA
DNA & Protein
DNA, RNA, & Protein
DNA, RNA, & Carbohydrate
Which of the following answers are TRUE? (2)
The genome of prokaryotes is much smaller and consists of a circular chromosome
The genome of both prokaryotes and eukaryotes consist of chromosomes comprised of DNA coiled around histones
The genome of humans consists of 46 molecules, whereas the genome of prokaryotes consists of one molecule plus any plasmids present
Plants do not have a genome
A genome refers only to the portions of DNA that contain genes
What type of mutation causes sickle cell anemia?
Base substitution
Base deletion
Base insertion
All of these types of mutation
How are new alleles formed?
By random mutation
By pre-determined mutation
During protein synthesis
New alleles can never be formed
What are the units of heredity responsible for influencing our traits (characteristics)?
proteins
ribonucleic acid
genes
hormones
Which of the following conditions makes a person a carrier of sickle cell anaemia?
having two normal versions of the HBB gene
have one normal and one faulty version of the HBB gene
having two faulty versions of the HBB gene
having no HBB gene at all
Which one of the following is incorrect about the effects of sickle cell anaemia?
higher frequency of blood clotting
irregular blood flow
lower oxygen carrying capacity
lower resistance to malaria
