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- 1. Multiple Choice
What is the order of organization of genetic material from largest to smallest?
nucleus, cell, gene, chromosome
cell, nucleus, chromosome, gene
gene, chromosome, nucleus, cell
chromosome, nucleus, gene, cell
- 2. Multiple Choice
Which of the following best describes a human chromosome?
It contains genes that may code for the production of enzymes.
It is made of amino acid subunits that form genes.
It is normally passed to the next generation through a placenta.
It varies in function from one generation to the next.
- 3. Multiple Choice
If 15% of a DNA sample is made up of thymine, T, what percentage of the sample is made up of cytosine ,C?
35%
15%
85%
70%
- 4. Multiple Choice
The shape of a protein is most directly determined by the
kind and sequence of amino acids in the protein.
amount of energy available for the synthesis of the protein.
type and number of DNA molecules in a cell.
mistakes made when the DNA is copied.
- 5. Multiple Choice
If a strand of DNA reads CCTATC, what would be the complementary strand?
CCTATC
GGATAG
GGAUAG
CCUAUC
- 6. Multiple Choice
Researchers have found that formaldehyde and asbestos can alter DNA base sequences. Based on this research, the use of these chemicals has been greatly reduced because they
are capable of causing mutations in humans
may act as fertilizers, increasing the growth of algae in ponds
have been replaced by more toxic compounds
interfere with the production of antibiotics by white blood cells
- 7. Multiple Choice
In sexually reproducing organisms, a mutation can be inherited if the occur in
either the egg or the sperm
the egg, only
the sperm, only
a body cell of either the mother or father
- 8. Multiple Choice
Coded instructions that are passed from one generation to the next can be most directly changed by the process of
passive transport, natural selection, and synthesis
selective breeding, replication, and absorption
evolution, reproduction and digestion
recombination, mutation, genetic engineering
- 9. Multiple Choice
If a gene is inserted into a bacterial cell, every cell produced by that cell will have
a copy of the inserted gene
DNA that is different from that of the other cells produced
a 50% chance of having a copy of that gene
a new type of DNA base
- 10. Multiple Choice
Cotton plants produce seeds that contain high quality protein. This protein could be used as a food source except that the seeds are poisonous to humans. Recently, scientists have inserted a section of DNA into the cotton plants that make the cotton seeds nonpoisonous. The technique for this procedure is known as
cloning
gene manipulation
reproduction
direct harvesting
- 11. Multiple Choice
A student added an enzyme to a test tube containing a sample of DNA. After a period of time, analysis of the DNA sample indicated that it was now broken into three segments.
The purpose of this enzyme was most likely to
copy the DNA for protein synthesis
move the DNA to a different organism
cut the DNA at a specific location
alter the DNA sequence in the segment
- 12. Multiple Choice
Plants in species A cannot fight most fungal infections. Plants in species B make a protein that kills many fungi. One possible way for humans to produce species A plant with the ability to synthesize this protein would be to
insert the gene for the protein from species B into a chromosome from species A.
mutate fungal DNA and introduce the mutated DNA into species B using a virus.
add DNA from species B into the soil around species A.
cross species A and a fungus to simulate the synthesis of this protein.
- 13. Multiple Choice
Which situation is the least likely to result in new inherited characteristics?
altering genetic information
changing the structure of the genes
producing new individuals by means of cloning
changes in the structure of individual chromosomes
- 14. Multiple Choice
Selective breeding is a technique that is used to
produce offspring with certain desirable traits
give all organisms a chance to reproduce
produce organisms from extinct species
keep farm crops free of all mutations
- 15. Multiple Choice
A liver cell can make enzymes that a heart cell cannot make because liver cells
remove carbon dioxide from blood
contain more DNA than heart cells
use different genes than the heart cells use
digest large complex molecules
- 16. Multiple Choice
Even though identical twins have the same material, they may develop slightly different characteristics because
one twin may only have genes from the father
gene expression may be influenced by factors that switch genes on and off
each twin receives different chromosomes from the egg
a gene mutation may have occurred before the zygote divided
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