Download EOC Unit 6 Practice Test

Biology Unit Six: DNA, RNA and Protein Synthesis EOC Practice Test
1. Matthew and Bradley got into an argument. Matthew was convinced that the above picture was
RNA, and Bradley was positive that it was DNA. Who is right and why?
A. Both Matthew and Bradley were wrong as this is not DNA or RNA.
B. Matthew was right because RNA is single-stranded while DNA is double-stranded.
C. There is not enough information in the picture to conclude who was right.
D. Bradley was right because DNA is single-stranded while RNA is double-stranded.
Use the chart below to answer questions 2-5
DNA
RNA
Nitrogenous Base Components
Cytosine, Guanine, Adenine
Cytosine, Guanine, Adenine
and __(2)___
and ____(4)___
Sugar Component
____(3)____
____(5)_____
2. Identify the additional nitrogenous base associated with DNA?
A. Uracil
B. Deoxyribose
C. Ribose
3. Identify the additional component associated with DNA?
A. Uracil
B. Deoxyribose
C. Ribose
4. Identify the additional nitrogenous base associated with RNA?
A. Uracil
B. Deoxyribose
C. Ribose
5. 4. Identify the additional component associated with RNA?
A. Uracil
B. Deoxyribose
C. Ribose
D. Thymine
D. Thymine
D. Thymine
D. Thymine
6. You are trying to identify this nucleic acid. All BUT one observation is an important clue to the
nucleic acid's identity. That is it
A. is single stranded.
B. contains ribose sugar.
C. contains phosphate.
D. contains uracil
7. How many chromosomes can be found in a human skin cell?
A. 23
B. 39
C. 46
D. 92
8. In the drawing, the gene is located at a specific site on a(n) ______ strand.
A.
DNA
B. RNA
C. Introns
D. tRNA
9. Chromosomes, which contain DNA, have several functions. All BUT ONE of these statements is a
function of chromosomes.
A. Chromosomes determine the traits of an organism.
B. Chromosomes determine the gender of an individual.
C. Chromosomes provide instructions to make proteins.
D. Chromosomes help an organism produce usable energy.
10. All organisms undergo protein synthesis. The first step of protein synthesis, in which a DNA
strand is used to make a complementary mRNA strand, is called
A. messaging.
B. transcription.
C. replication.
D. translation.
11. A scientist analyzed four samples of nitrogenous bases to determine wheter or not they contained
DNA. Her results are found in the table below:
Nitrogenous Bases
Sample
C
A
G
T
1
43
28
43
7
2
43
28
43
28
3
37
34
37
17
Based on her results, which sample does not contain RNA?
A. Sample 1
B. Sample 2
C. Sample 3
D. None
12. Messenger RNA carries a(n) ___________ of the DNA’s instructions out of the nucleus to the
___________.
A. exact copy; ribosome
B. exact copy; mitochondria
C. transcript; ribosome
D. transcript; mitochondria
13. Given the sequence of DNA nucleotide bases TTAGCCTTG, give the complementary strand of
mRNA produced during transcription.
A. AAAGCCAAC
B. AAUCGGAAC
C. AAGGUAGUA
D. AAUTGCCTA
14. What type of RNA acts like a delivery truck, delivers amino acids to the ribosome for protein
synthesis, and then leaves empty again, to go collect another amino acid?
A. Transfer RNA B. Ribosomal RNA
C. Messenger RNA
D. Mitochondrial RNA
Use the Codon chart below to answer questions 15-16
15. A strand of DNA with the sequence AAC AAG CCC undergoes a mutation, and the first A is
changed to a C. How will this mutation affect the amino acid sequence?
A. One amino acid will change.
B Two amino acids will change.
C. All of the amino acids will change.
D. The amino acids will remain the same.
16. A strand of mRNA read GUU GCU CCU CUA GGU. What would the amino acid sequence be?
A. Val-ALA-ASP-LEU-ARG
B. VAL-ARG-ASP-LEU-ALA
C. VAL-ALA-PRO-LEU-GLY
D. GLY-ALA-PRO-VAL-LEU
17. If a dog has 39 pairs of chromosomes, how many of those pairs are considered autosomes?
A. One pair B. 38 Pairs
C. Two Pairs
D. None are autosomes
18. Given the following:
I. A ribosomes reads the codons on the mRNA
II. The ribosome moves along mRNA, creating a polypeptide
III. Amino acids attach to tRNA and move to the ribosome
IV. mRNA is transcribe from DNA
A. I, II, II, IV B. IV, II, III, I
C. IV, III, II, I
D. IV, I, III, II
19. A segment of DNA has the following sequence: TACGGTCTCAGC. Which of the following
represents the correct mRNA transcript for the segment?
A. AUGCCAGAGUCG
B. ATGCCAGAGTCG
C. UACGGUCUCAGC
D. TACGGTCTCAGC
20. The karyotype for trisomy 21(down syndrome) illustrates an example of a genetic mutation caused
by a(n)_________________________.
A. insertion.
B. crossing over.
C. inversion.
D. nondisjunction
21. DNA replication results in:
A. Two completely new DNA molecules
B. Two DNA molecules that each contain a strand of the original
C. One new DNA molecule, 1 old molecule is conserved
D. One new molecule of RNA
22. During your summer job at Virotech, you isolate a previously unknown virus. Analysis of its
genome reveals that it is composed of a double stranded DNA molecule containing 14% T (thymine).
Based on this information, what would you predict the %C (cytosine) to be?
A. 14%
B. 28%
C. 36%
D. 72%
23. In which organelle does transcription take place?
A.
In the nucleus
B.
Outside the cell
C.
In the cytoplasm
D.
In the mitochondrion
24. A 3 nitrogenous base sequence on mRNA that codes for a certain amino acid is called what?
A.
neutrinos
C.
patrinos
B.
anticodons
D.
codons
25. In the Diagram below, what structure represents tRNA?
A. Structure 1
B. Structure 2
C. Structure 3
D. None of the above