Essential Biochemistry - Genetic Engineering (Section 2)

• 1

  Which of the following is not an application of genetic engineering?

  Відповідь

  (D)

  Development of new antibiotics
• 2

  What is the role of DNA ligase in recombinant DNA technology?

  Відповідь

  (B)

  Joining DNA fragments together.
• 3

  What is the purpose of a selectable marker in a cloning vector?

  Відповідь

  (A)

  To allow for the identification of cells that have taken up the vector.
• 4

  What is the key advantage of using plasmids as cloning vectors?

  Відповідь

  (A)

  They are small and easy to manipulate.
• 5

  Polymerase chain reaction (PCR) is a technique for

  Відповідь

  (A)

  Amplification of DNA in vitro
• 6

  Which of the following techniques is used to amplify DNA fragments?

  Відповідь

  (A)

  PCR
• 7

  What is the purpose of the extension step in PCR?

  Відповідь

  (C)

  To synthesize new DNA strands.
• 8

  Which of the following is NOT a common use of PCR?

  Відповідь

  (C)

  Genetically modifying an organism
• 9

  What is the role of a selectable marker in a cloning vector?

  Відповідь

  (B)

  To allow for the identification of cells that have taken up the vector.
• 10

  What is the function of a promoter in a cloning vector?

  Відповідь

  (A)

  To signal the start of transcription.
• 11

  What is the name of the process where foreign DNA is introduced into a bacterial cell?

  Відповідь

  (A)

  Transformation
• 12

  What is the primary difference between a genomic DNA library and a cDNA library?

  Відповідь

  (A)

  Genomic libraries contain all DNA sequences, while cDNA libraries contain only coding sequences.
• 13

  Which of the following is NOT a characteristic of a cloning vector?

  Відповідь

  (D)

  mRNA template
• 14

  Which one of the following enzyme is required for PCR?

  Відповідь

  (B)

  Taq polymerase
• 15

  What is the role of ligase in recombinant DNA technology?

  Відповідь

  (C)

  To join DNA fragments.
• 16

  Which of the following is not a step in recombinant DNA technology?

  Відповідь

  (D)

  Hybridization of the gene of interest with mRNA
• 17

  What is the function of a probe in Southern blotting?

  Відповідь

  (B)

  To identify a specific DNA sequence
• 18

  Which of the following are key components in the process of creating recombinant DNA?

  Відповідь

  A

  B

  C
• 19

  What type of analysis is used to detect the presence of specific DNA sequences in a sample?

  Відповідь

  (B)

  Southern blotting
• 20

  In genetic engineering, which of the following enzymes is used to join DNA fragments?

  Відповідь

  (B)

  DNA ligase
• 21

  The main purpose of using a cloning vector is to:

  Відповідь

  (D)

  All of the above.
• 22

  In gel electrophoresis, DNA fragments move toward which electrode?

  Відповідь

  (A)

  The positive electrode
• 23

  What is the principle behind the use of RFLP analysis?

  Відповідь

  (A)

  Differences in DNA sequence can lead to variations in the size of DNA fragments after digestion with restriction enzymes.
• 24

  Which of the following is an example of a commonly used restriction enzyme?

  Відповідь

  (B)

  EcoRI
• 25

  Which of the following is used to cut DNA at specific locations?

  Відповідь

  (C)

  Restriction enzyme
• 26

  Which technique is used to analyze RNA molecules?

  Відповідь

  (B)

  Northern blotting
• 27

  Restriction endonuclease has the following characteristics, except:

  Відповідь

  (D)

  Cut DNA randomly
• 28

  What does cDNA stand for?

  Відповідь

  (C)

  Complementary DNA
• 29

  Most commonly used cloning vectors are

  Відповідь

  (D)

  All of the above
• 30

  What is the role of a vector in recombinant DNA technology?

  Відповідь

  A

  C