A: toxin
B: enzyme
C: antibiotic
D: structural protein
举一反三
- Which of the following genes are structural genes? (). A: The promoter B: The enhancer C: The silencing D: The guide protein synthesis
- The enzyme neuraminidase consists of a ring of __ identical protein subunits.
- When an enzyme protein is purified and assayed step by step, _____________________________________ with each step. A: oth activity and total protein generally increase B: activity increases but total protein generally decreases C: oth activity and total protein generally decrease D: activity decreases but total protein generally increases
- Most solid materials are ( ) A: Crystal B: Enzyme C: Protein D: Quasicrystal
- The Structural Classification of Proteins (SCOP2) database (http://scop2.mrc-lmb.cam.ac.uk) organizes protein folds into four classes: __________________. A: allα B: allβ C: α/β (with α andβ segments interspersed or alternating) D: α+β (withα andβ regions somewhat segregated)
内容
- 0
β-turns in protein molecules belong to the protein's hierarchical structure? A: Primary structure B: Secondary structure C: Tertiary structure D: Side chain conformation
- 1
Which of the following signaling molecules could be directly activated by Ca ion binding? A: cAMP B: Calmodulin C: Protein kinase A D: Protein kinase B E: Protein kinase G
- 2
Among the following phenomena, ( ) is not the main manifestation of the effect of denaturation on protein. A: The solubility of protein increases B: The protein's water holding capacity drops C: Protein is easily digested and absorbed D: The biologically active protein loses its biological activity
- 3
which of the following is irrelevant to protein bioavailability( ) A: amino acid composition B: protein conformation C: Lignin and proteases D: Millard reactions
- 4
Butyrate can function as ： A: protein methylation B: Protein acetylation C: Protein phosphorylation D: Protein deacetylation