After double-stranded DNA thermal denaturation（）
A. Decrease in viscosity
B. Decrease in sedimentation coefficient
C. Decrease in buoyancy density
Decrease in UV absorption
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The key parts of storing and transmitting genetic information in nucleic acid molecules are（）
A. Nucleoside
B. Pentose
C. Phosphate
D. Base sequence
The main contents of the biochemistry course include（）
A. Chemical composition of organisms
B. Metabolism of substance and energy
C. Information metabolism
D. Laws of genetics
Which of the following statements about the biochemistry is correct（）
A. Biochemistry is an interdisciplinary subject of chemistry and biology
Biochemistry studies the chemical composition of organisms
C. Biochemistry studies various chemical changes that drive the movement of life
D. Biochemistry and Molecular Biology are closely related and overlap in part
Regarding the type and distribution of RNA, which of the following statements is correct（）
A. RNA is mainly found in the nucleus
B. mRNA accounts for about 5% of the total RNA of the cell and serves as a template in protein synthesis
C. rRNA accounts for 80% of the total RNA of the cell, is a component of the ribosome, and is a place for protein synthesis
D. tRNA accounts for 10-15% of the total RNA of the cell, and plays the role of carrying activated amino acids in protein synthesis
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