Which of the following is a step in the process of translation?
A. RNA polymerase binds to the promoter sequence
B. Introns are removed from the transcript
C. A string of A's are added to the 3? end of the mRNA
D. Anticodons on the tRNAs bind to their complementary codons on mRNA
B
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Which of the following gas exchange abnormalities occur with worsening airflow obstruction? I. Asthma patients can hypoventilate, producing hypercapnic respiratory failure. II. Overdistended alveoli in certain lung regions together with capillary loss increase capillary shunting in emphysema patients. III. Hypoxemia-induced pulmonary vasoconstriction increases capillary shunting. IV. Hypoxemia
can develop from V/Q mismatching caused by maldistribution of ventilation. A. I, II only B. I, IV only C. I, II, III only D. II, III, IV only
1925 รท 5
What will be an ideal response?