DNA, Chromosomes And Genes Question Preview (ID: 55941)


Biological Diversity Topic 5 - Science 9 ALBERTA. TEACHERS: click here for quick copy question ID numbers.

Human have 23 chromosomes
a) True
b) False
c)
d)

Which of the following is not true of the structure of DNA?
a) The backbone is made up of alternating sugars and phosphates.
b) Each nucleotide contains a phosphate, a sugar, and two nitrogen bases.
c) Nitrogen bases A and T bond together, and bases C and G bond together.
d) The molecule has the shape of a coiled ladder.

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) 2
b) 8
c) 16
d) 32

A gene is
a) another name for a chromosome.
b) a section of DNA that codes for a specific protein.
c) a tightly coiled strand of DNA.
d) the result of meiosis.

In the DNA molecule, the nitrogen bases are always found in pairs. The base A pairs with...
a) C
b) T
c) G
d) A

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.

The DNA that directs all cell activities is contained in the cells _____________
a) nucleus
b) cytoplasm
c) cell membrane
d) vacuole

Another name for a body cell is a
a) gamete
b) somatic cell
c)
d)

One of the first uses of modern biotechnology was
a) the insertion of a human insulin gene into bacteria.
b) the insertion of a bacterial insulin gene into human cells.
c) the cloning of a mammal.
d) the insertion of an antifreeze gene into a fish.

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.

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