Explain the roles of messenger and transfer RNA in protein synthesis
What will be an ideal response?
Messenger RNA (mRNA) is built from a template of DNA. Each amino acid is specified by a corresponding mRNA codon. Transfer RNA (tRNA) acts as a molecular translator which has an anticodon at one end and the corresponding amino acid at the other end. The anticodon contains a sequence of three nucleotides complementary to a specific mRNA codon.
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What is the linea alba?
A. A thin layer of muscle used to attach two other muscles together B. A flat sheet of connective tissue used for muscle insertion C. A narrow, vertical, fibrous strip used to attach muscle sheaths of the left and right rectus abdominis D. A fibrous, perpendicular insertion between successive sheets or blocks of muscle E. A round tendonlike structure attaching muscle to bone
Ducts from which of the following open into the mouth behind the teeth on either side of the lingual frenulum?
A) sublingual salivary glands B) pancreas C) submandibular salivary glands D) parotid salivary glands E) lingual salivary glands
The anterior cruciate ligament, of the knee joint, anchors the tibia bone to:
A) a ligament. B) another bone. C) a bursa. D) a muscle.
Which neurotransmitter substance has been implicated in Parkinson's disease?
A. norepinephrine B. dopamine C. serotonin D. GABA E. acetylcholine