Protein Synthesis

Which base is normally used in the synthesis of RNA but not in the synthesis of DNA?
1. adenine
2. cytosine
3. uracil
4. guanine
A strand of messenger RNA is transcribed from an original strand of DNA. The original bases on the DNA strand were T-A-C-G. What is the base sequence on the RNA
strand produced from this?
1. U-A-G-C
2. T-A-G-C
3. C-G-A-U
4. A-U-G-C
During protein synthesis, which type of molecule attaches particular amino acid molecules and positions them in specific positions on the polypeptide chain?
1. DNA
2. mRNA
3. tRNA
4. ADP
Which of the following is incorrect in comparing DNA to RNA?
1. both molecules are composed of nucleotides
2. DNA contains deoxyribose while RNA contains ribose.
3. DNA is single stranded while RNA is double stranded
4. RNA has uracil while DNA has thymine
In RNA molecules, adenine pairs with which nucleotide?
1. uracil
2. thymine
3. guanine
4. cytosine
In the cytoplasm, messenger RNA becomes attached to the
1. cytoplasm
2. chloroplasts
3. centrosomes
4. ribosomes
Select the type of nucleic acid molecule that is best described by the following phrase: carry genetic information from the nucleus to the ribosomes.
1. DNA molecules, only
2. Both DNA and RNA molecules
3. RNA molecules, only
4. Neither DNA nor RNA molecules
The correct order of molecules involved in protein synthesis is
1. messenger RNA, transfer RNA, DNA, polypeptide
2. transfer RNA, polypeptide, DNA, messenger RNA, DNA
3. DNA, messenger RNA, polypeptide, transfer RNA
4. DNA, messenger RNA, transfer RNA, polypeptide
Use the diagram below and your knowledge of biology to answer questions which follow. The diagram represents molecules involved in protein synthesis.

In plant cells, molecule 1 is found in the __________________?
1. centriole
2. cell wall
3. nucleus
4. ribosome
Use the diagram below and your knowledge of biology to answer questions which follow. The diagram represents molecules involved in protein synthesis.

The building blocks of molecule 3 are known as ________________?
1. amino acids
2. nucleotides
3. fatty acids
4. monosaccharides
Use the diagram below and your knowledge of biology to answer questions which follow. The diagram represents molecules involved in protein synthesis.

Where do the chemical reactions that are coded for by molecule 2 take place?
1. in the vacuole
2. in the lysosome
3. on the plasma membrane
4. at ribosomes
Use the diagram below and your knowledge of biology to answer questions which follow. The diagram represents molecules involved in protein synthesis.

Molecule 2 is which type of molecule?
1. DNA
2. RNA
3. a polypeptide
4. a fatty acid
Use the diagram below and your knowledge of biology to answer questions which follow. The diagram represents molecules involved in protein synthesis.

Molecule 3 is known as _____________________?
1. DNA B. C. D.
2. RNA
3. a polypeptide
4. a fatty acid
The code of a gene is delivered to the enzyme-producing region of a cell by a ______?
1. hormone
2. messenger RNA molecule
3. nerve impulse
4. DNA molecule
Recombinant DNA is presently used in the biotechnology industry to_________?
1. eliminate all infectious disease in livestock
2. increase the frequency of fertilization
3. synthesize insulin, interferon, and human growth hormone
4. create populations that exhibit incomplete dominance
Some events that take place during the synthesis of a specific protein are listed below.
(A) Messenger RNA attaches to a ribosome.
(B) DNA serves as a template for RNA production.
(C) Transfer RNA bonds to a specific codon.
(D) Amino acids are bonded together.
(E) RNA moves from the nucleus to the cytoplasm.
The correct order of these events is _________?
1. B --> E --> A --> C --> D
2. B --> C --> E --> D --> A
3. D --> A --> E --> C --> B
4. C --> B --> A --> E --> D
Which chemical components may be parts of a molecule of transfer RNA?
1. ribose, phosphate group, uracil base
2. glucose, amino group, thymine base
3. deoxyribose, phosphate group, guanine base
4. maltose, carboxyl group, uracil base
Use the information provided in the chart below and your knowledge of biology to answer questions which follow. The diagram represents molecular structures involved in protein synthesis.

Structure 1 represents __________?
1. part of a polypeptide chain
2. a portion of an RNA molecule
3. a portion of a DNA molecule
4. the building blocks of proteins
Use the information provided in the chart below and your knowledge of biology to answer questions which follow. The diagram represents molecular structures involved in protein synthesis.

The DNA code for aspartic acid is _____?
1. C-T-G
2. C-C-T
3. C-C-U
4. C-U-G
Use the information provided in the chart below and your knowledge of biology to answer questions which follow. The diagram represents molecular structures involved in protein synthesis.

Proline, methionine, and aspartic acid represent three types of ______?
1. fatty acids
2. hormones
3. amino acids
4. enzymes
Use the information provided in the chart below and your knowledge of biology to answer questions which follow. The diagram represents molecular structures involved in protein synthesis.

Structure 2 is synthesized in the ___________.
1. nucleus
2. ribosome
3. vacuole
4. lysosome
Use the diagram provided below and your knowledge of biology to answer questions which follow.

The synthesis of structure X occurred in the _____?
1. chloroplast
2. ribosome
3. cytoplasm
4. nucleus
Use the diagram provided below and your knowledge of biology to answer questions which follow.

Which amino acid would be transferred to the position of codon CAC?
1. leucine
2. valine
3. glycine
4. histidine
A sequence of three nitrogenous bases in a messenger RNA molecule is known as a
1. codon
2. polypeptide
3. gene
4. nucleotide
Using special enzymes, scientists have successfully removed the gene that controls
the production of interferon and have inserted this gene into the DNA of certain
bacteria. These bacteria can now produce interferon. This technique is known as
1. amniocentesis
2. genetic engineering
3. differentiation
4. karyotyping