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DNA, Chromosomes And Genes
Test Description: Biological Diversity Topic 5 - Science 9 ALBERTA
Instructions: Answer all questions to get your test result.
1) Human have 23 chromosomes
A
False
B
True
2) Which of the following is not true of the structure of DNA?
A
The backbone is made up of alternating sugars and phosphates.
B
Nitrogen bases A and T bond together, and bases C and G bond together.
C
The molecule has the shape of a coiled ladder.
D
Each nucleotide contains a phosphate, a sugar, and two nitrogen bases.
3) If the embryo shown above had four chromosomes in each of its cells, how many different combinations of chromosomes could be found in its gametes?
A
8
B
32
C
2
D
16
4) A gene is
A
the result of meiosis.
B
a section of DNA that codes for a specific protein.
C
a tightly coiled strand of DNA.
D
another name for a chromosome.
5) In the DNA molecule, the nitrogen bases are always found in pairs. The base A pairs with...
A
G
B
T
C
A
D
C
6) A mutation causes a bacterial cell to begin producing a new protein. The mutation probably...
A
changed the number of chromosomes in the bacterial cell.
B
led to a new combination of chromosomes in the bacterial cell.
C
will not be passed on to daughter cells when the bacterial cell divides.
D
changed the sequence of nucleotides within part of the bacterial DNA.
7) The DNA that directs all cell activities is contained in the cells _____________
A
cytoplasm
B
cell membrane
C
vacuole
D
nucleus
8) Another name for a body cell is a
A
somatic cell
B
gamete
9) One of the first uses of modern biotechnology was
A
the insertion of an antifreeze gene into a fish.
B
the insertion of a human insulin gene into bacteria.
C
the cloning of a mammal.
D
the insertion of a bacterial insulin gene into human cells.
10) Which of the following is not a feature of DNA?
A
It can reproduce itself.
B
It can be passed from parent to offspring.
C
It codes for specific chromosomes in the cell.
D
It is stored in the cell nucleus.
*select an answer for all questions
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