Which of the following statements about non-coding DNA is true ()?
A: DNA sequences that do not encode proteins
B: DNA sequences that do not encode RNA and proteins
C: DNA sequence without function
D: DNA sequence without phenotype after deletion
[单选题][2分][难度3]
A: DNA sequences that do not encode proteins
B: DNA sequences that do not encode RNA and proteins
C: DNA sequence without function
D: DNA sequence without phenotype after deletion
[单选题][2分][难度3]
举一反三
- Which of the<br/>following statements about non-coding DNA is wrong? () A: DNA sequence of non-coding protein. B: DNA sequence of non-coding RNA and protein. C: DNA sequence participating in the regulation of gene expression, but<br/>not coding protein. D: Relate to genome protection.
- Which of the following statements are correct ( ) A: In eukaryotes, a gene can encode different proteins, but a mature mRNA chain encodes only one protein. B: The function of the promoter is affected by both the DNA sequence and its conformation. C: TFs help RNA polymerase recognize the promoter. D: In DNA biosynthesis, semi-reserved replication and semi-discontinuous replication refer to the same concept.
- Which of the following DNA sequences is complementary to the mRNA sequence of 5’-AAGUCA-3’?下列哪一个DNA序列是5’-AAGUCA-3’的互补序列？ A: 5’-AAGUCA-3’ B: 5’-TTCAGT-3’ C: 5’-UUCAGU-3’ D: 5’-TGACTT-3’
- Stability genes (also called caretaker genes) encode proteins that function in the repair of major genetic defects that result from aberrant DNA replication, ionizing radiation, or environmental carcinogens.
- The sequence of part of a DNA strand is the following: -ATTCGATTGCCCACGT-. When this strand is used as a template for DNA synthesis, the product will be which one of the following?