Which of the following will not happen when telomerase loses its function in cells?()
A. Telomere was gradually shortened with every cell division
B. Cells exhibit aging or even death after 30 to 50 times of cell division
C. Immune system loses some defense ability gradually
D. Numerous somatic cells start to proliferate indefinitely
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The correct description about the telomerases is()
A. They are abound in eukaryotes
B. C, H, O, N, P are included in the telomerases
C. They belong to ribozyme, catalyzing the reaction which RNA is involved
D. They can carry genetic information
E. The RNA sequences as extension template are the same in telomerase from different species
Which of the following statements about telomere is correct?()
A. Telomeres are special structure composing of nucleosomes in the end of eukaryotic chromosomes
B. Telomeres can stable DNA secondary structure
C. Telomerases act as template as well as reverse transcriptase
D. Cell aging is related to the abnormal extend of telomere
E. Telomere refers to the DNA sequences in the end of linear chromosome which are rich in guanine nucleotide
Telomerase is a()
A. DNA-dependent DNA polymerase
B. DNA-dependent RNA polymerase
C. RNA-dependent DNA polymerase
D. RNA-dependent RNA polymerase
Single-strand binding protein in the replication fork can separate two strands of DNA and prevent the complementary pairing of bases.()
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