举一反三
- The genetic material of a bacteria is located in the molecule A: RNA B: DNA C: protein D: lipid
- Many thousands of proteins in a typical eukaryotic cell are regulated by cycles of phosphorylation and _______________.
- 核糖体由_____组成 A: Only RNA B: Only proteins C: Only DNA D: RNA and proteins
- The envelope of an animal virus is derived from the____of its host cell.( ) A: cell wall B: cell membrane C: glycolyx D: receptors
- Complex<br/>of DNA and proteins that makes up the chromosomes in a eukaryotic<br/>cell is called ______ .
内容
- 0
A cell's _______ is the entire sequence of nucleotides in an organism’s DNA, which provides a genetic program that instructs the cell how to behave.
- 1
SARS-CoV-2 is a ____ A: RNA virus B: DNA virus C: Viroid D: Virusoid E: Prion
- 2
In 1953, Watson and Crick found that: A: Two polynucleotide chains form double helix structure of DNA by hydrogen bond linkage B: DNA replication is semi-conservative and usually form heteroduplex DNA consisted of one parental chain and one daughter chain C: Three continuous nucleic acids consist of a genetic code D: Genetic material is usually DNA instead of RNA
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The envelope of an animal virus is derived from the ______ of its host cell. A: cell wall B: glycoproteins C: membrane D: receptors
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The envelope of an animal virus is derived from the ( ) of its host cell. A: cell wall B: membrane C: glycocalyx D: receptors