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TLS Online TPP Program

#Question id: 34965

Which of the following statements is/are correct for microcarrier culture? 

#Section 6: Plant, Animal and Microbial Biotechnology
  1. Only Dextran beads (Sephadex A-50) are used.
  2. These systems use 90-300 μm diameter particles as substrate for cell attachment.
  3. Microcarrier cultures are initiated by harvesting cells from  a logarithmic phase (log phase) culture.
  4. Microcarrier cultures are initiated by harvesting cells from a lag phase culture.
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TLS Online TPP Program

#Question id: 3762

#Section 3: Genetics, Cellular and Molecular Biology

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?
TLS Online TPP Program

#Question id: 3763

#Section 3: Genetics, Cellular and Molecular Biology

What is the function of the enzyme topoisomerase in DNA replication?
TLS Online TPP Program

#Question id: 3764

#Section 3: Genetics, Cellular and Molecular Biology

What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
TLS Online TPP Program

#Question id: 3765

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following types of molecules help to hold the DNA strands apart while they are being replicated?
TLS Online TPP Program

#Question id: 3766

#Section 3: Genetics, Cellular and Molecular Biology

Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight, and mutations to the DNA in their skin cells are left uncorrected. Why are the mutations not corrected in individuals with this disorder?
TLS Online TPP Program

#Question id: 3767

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following characteristics would you expect of a eukaryotic organism that lacks the enzyme telomerase?