Which of the following types of RNA carries amino acids to the ribosome during protein synthesis?
A. Messenger RNA
B. Ribosomal RNA
C. Transfer RNA
D. Small nuclear RNA
Transfer RNA (tRNA) is a type of RNA molecule that carries amino acids to the ribosome during protein synthesis. Each tRNA molecule has a specific sequence of three nucleotides called an anticodon, which pairs with a complementary codon in the messenger RNA (mRNA) sequence. Each tRNA also carries a specific amino acid that corresponds to the codon it recognizes, allowing the ribosome to link the amino acids together in the correct order to form a protein.
In contrast, messenger RNA (mRNA) carries the genetic information from the DNA to the ribosome, where it serves as a template for protein synthesis. Ribosomal RNA (rRNA) is a component of the ribosome itself, where it helps to catalyze the formation of peptide bonds between amino acids. Small nuclear RNA (snRNA) is involved in splicing of pre-mRNA molecules during post-transcriptional processing.
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Therefore, the Correct Answer is C.
More Questions on TEAS 7 Science
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Q #1: Which part of the respiratory system is responsible for regulate breathing rate and depth?
A. Bronchi
B. Alveoli
C. Diaphragm
D. Trachea
Answer Explanation
The diaphragm is responsible for regulang breathing rate and depth. It is a dome-shaped muscle located at the botom of the chest cavity that contracts and relaxes to help move air in and out of the lungs.
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Q #2: A researcher collects data on the number of cars passing through a busy intersection at different times of the day for a month. This data would be most useful to analyze which of the following:
A. traffic patterns during rush hour
B. pedestrian movement during the day
C. air pollution levels in the area
D. noise levels in the area
Answer Explanation
The data collected by the researcher on the number of cars passing through a busy intersection at different times of the day for a month would be most useful to analyze traffic patterns during rush hour.
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Q #3: Which statement best defines the difference between a physical change and a chemical change?
A. A physical change involves the rearrangement of atoms and molecules while a chemical change involves the formation of new substances with different chemical properties.
B. A physical change involves the change of one state of matter to another while a chemical change involves the change of one substance into another.
C. A physical change involves the breaking of chemical bonds while a chemical change involves the breaking of intermolecular forces.
D. A physical change involves the release of energy while a chemical change involves the absorption of energy.
Answer Explanation
A physical change is a change that affects the physical properties of a substance, but does not change its chemical identity. Physical changes include changes in state, such as melting or boiling, changes in shape or size, and changes in phase, such as the dissolution of a solid in a liquid.
A chemical change, on the other hand, is a change that results in the formation of new substances with different chemical properties. Chemical changes involve the breaking of chemical bonds between atoms and the formation of new bonds to create new compounds. Chemical changes are usually accompanied by a change in color, the formation of a gas or a solid, or the release or absorption of energy.
Overall, the main difference between a physical change and a chemical change is that a physical change only affects the physical properties of a substance while a chemical change results in the formation of new substances with different chemical properties.
Note: Choice B is partially cirrect since physical changes can involve changes in the state of matter (e.g., ice melting into water), but it's not the main characteristic. A chemical change typically involves the change of one substance into another with different chemical properties.
