DNA & Protein Synthesis Practice Quiz

1. DNA holds the instructions for making
genes
traits
proteins
amino acids

2. In DNA replication, one old strand pairs with one new strand forming two new DNA molecules. This process is called:
copying
semiconservative replication
conservative replication
duplication

*3. A scientist puts nucleotide chains of UUUUUU in a test tube under conditions allowing protein synthesis. Soon the test tube is full of polypeptide chains composed of only the amino acid phenylalanine. What does this experiment indicate?
The amino acid phenylalanine is composed of uracil.
UUU codes for the amino acid phenylalanine.
Protein synthesis malfunctions in test tubes.
Most proteins contain only one type of amino acid.

4. The RNA produced from the DNA strand ATTCGG, would be:
TAAGCC
GCCTAA
CCGAAT
UAAGCC

*5. The diagram below shows Rosalind Franklin's x-ray diffraction image of DNA.

How did this evidence affect the work of Watson and Crick?
It was used to determine the physical structure of DNA.
It was used to identify the four bases that make up DNA.
It was used to develop the theory of independent assortment.
It was used to show that DNA was the molecule of inheritance.

6. The RNA molecule is
single-stranded
contains ribose sugar
contains the nitrogenous base, uracil
all of the above

*7. A strand of mRNA containing the repeating sequence AAGAAGAAGAAG could code for which of the following amino acid sequences?
lys-arg-glu-lys
ser-ser-glu-glu
lys-arg-lys-arg
lys-lys-lys-lys		 codon chart


*8. Which of these would most likely cause a mutation?
the placement of ribosomes on the endoplasmic reticulum
the insertion of a nucleotide into DNA
the movement of transfer RNA out of the nucleus
the release of messenger RNA from DNA

*9.
5' G T A _ _ _ A A 3'
3' C A T G C A T T 5'
This segment of DNA has undergone a mutation in which three nucleotides have been deleted. A repair enzyme would replace them with
CGT.
GCA.
CTG.
GTA.

10. Which of the following statements about the strands of a newly replicated DNA molecule is correct?
Both strands are made up of newly assembled nucleotides.
One strand is new and the other is part of the original molecule.
Both strands contain some nucleotides from the original molecule.
The base pairs are conserved and new sugar-phosphate backbones are built up on them.

11. How many nitrogenous bases code for 1 amino acid?
1
2
3
4


Score =
Correct answers:

*taken from 2003, 2004, 2005 CDE Released Test Questions-http://www.cde.ca.gov/ta/tg/sr/css05rtq.asp
If you find any broken links, please notify me at: bsafarik@pusdk12.org