1. Which of the following is not a stop codon?
(A) UGG
(B) UGA
(C) UAG
(D) UAA

16. Which of the following is not true of coronavirus disease 2019 (COVID-19)? (A) COVID-19 is not pandemic disease (B) COVID-19 entry into human cells is mediated by a cell surface receptor angiotensin-converting enzyme (C) Patients infected with COVID-19 may cause cytokine storm in patients (D) COVID-19 may block interferon-stimulated genes expression (E) All of the choices are correct

17. Which is not true of coronavirus disease (COVID-19)? (A) COVID-19 is an infectious disease caused by the SARS-CoV-2 virus (B) Older people and those with underlying medical conditions like cardiovascular disease or diabetes are more likely to develop serious illness (C) Older people and those with underlying medical conditions like chronic respiratory disease or cancer are more likely to develop serious illness (D) Get vaccinated when it's your turn and follow local guidance (E) All of the choices are correct

18. Which of the following is not true? (A) Viral envelopes are composed of lipids (B) Viral envelopes are composed of proteins (C) Viral envelopes are composed of carbohydrates (D) Viral envelopes are composed of nucleic acids (E) All of the choices are correct

19. The protein coat that encases viral genetic material is known as a (A) matrix (B) capsid (C) glycoprotein (D) lipid (E) All of the choices are correct

2. In eukaryotes, DNA replication occurs during (A) G1 phase (B) G2 phase (C) M phase (D) S phase

3. Which activity of DNA polymerase I is also called "proofreading" activity? (A) 5' to 3' polymerase activity (B) 3' to 5' polymerase activity (C) 5' to 3' exonuclease activity (D) 3' to 5' exonuclease activity

4. Which subunit of DNA polymerase III increases its processivity? (A) α subunit (B) γ complex (C) ε subunit (D) β subunit

5. Which of the following protein is not required for DNA replication in E. coli? (A) DNA helicase (B) Primase (C) DNA ligase (D) DNA glycosylase

6. Which of the following is a true statement regarding DNA polymerase? (A) It is a processive enzyme (B) It contains proofreading activity (C) It requires a short primer or oligonucleotide to start synthesizing new DNA strands (D) All of the above

7. Which of following technique is used to detect mRNA level in the cells? (A) Northern blotting (B) Southern blotting (C) Western blotting (D) Far western blotting