Domanda del libro di testo
The phase of mitosis during which centrioles reach the poles and chromosomes attach to the spindle is
a. Anaphase
b. Metaphase
c. Prophase
d. Telophase
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Ch. 3 Cells: The Living Units
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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TOC.tableOfContents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 10
The RNA species that travels from the nucleus to the cytoplasm carrying the coded message specifying the sequence of amino acids in the protein to be made is
a. mRNA
b. tRNA
c. rRNA
d. all of these
Guida verificata passo dopo passo1
Step 1: Understand the roles of different RNA types in protein synthesis. Messenger RNA (mRNA) carries the genetic code from DNA in the nucleus to the cytoplasm, where proteins are made.
Step 2: Recognize that transfer RNA (tRNA) brings amino acids to the ribosome during protein synthesis but does not carry the coded message from the nucleus.
Step 3: Know that ribosomal RNA (rRNA) is a structural and functional component of ribosomes, facilitating the assembly of amino acids into proteins, but it does not carry the genetic code.
Step 4: Identify that the RNA species responsible for traveling from the nucleus to the cytoplasm carrying the coded message specifying the amino acid sequence is mRNA.
Step 5: Conclude that the correct answer is mRNA, as it is the RNA that transmits the genetic information needed for protein synthesis.
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Messenger RNA (mRNA)
mRNA is the RNA molecule that carries genetic information from DNA in the nucleus to the cytoplasm, where it serves as a template for protein synthesis. It contains codons that specify the sequence of amino acids in a protein.
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Percorso guidato
08:44
2) RNA Splicing Creates Mature mRNA
Transfer RNA (tRNA)
tRNA is responsible for bringing the correct amino acids to the ribosome during protein synthesis. Each tRNA recognizes specific codons on the mRNA through its anticodon and helps assemble the amino acid chain.
Video consigliato:
Percorso guidato
06:16Ribosomal tRNA Binding Sites
Ribosomal RNA (rRNA)
rRNA is a structural and functional component of ribosomes, the cellular machinery where proteins are synthesized. It helps catalyze the formation of peptide bonds between amino acids during translation.
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Percorso guidato
08:42Ribosome Subunits
Pratica correlata
Domanda del libro di testo
A physiologist observes that the concentration of sodium inside a cell is decidedly lower than that outside the cell. She also observes that there is a small leakage of sodium into the cell. What cellular process prevents the sodium concentration gradient from disappearing?
a. Osmosis
b. Diffusion
c. Primary active transport
d. Secondary active transport
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Domanda del libro di testo
The information sequence that determines the nature of a protein is:
a. Nucleotide
b. Gene
c. Triplet
d. Codon
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Domanda del libro di testo
Cells lining the trachea have whiplike motile extensions on their free surfaces. What are these extensions, what is their source, and what is their function?
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Domanda del libro di testo
The RNA synthesized on one of the DNA strands is:
a. mRNA
b. tRNA
c. rRNA
d. all of these.
86
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Domanda del libro di testo
If DNA has a sequence of AAA, then a segment of mRNA synthesized on it will have a sequence of:
a. TTT
b. UUU
c. GGG
d. CCC
1155
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