The following genes ____________________ for the regulation of cell cycle are housekeeping genes in humans. A: Rho GTPase-activating protein 5 (ARHGAP5) & Rho GDP-dissociation inhibitor 1 (ARHGDIA) B: Rho guanine nucleotide exchange factor 7/11/40 (ARHGEF7/11/40) & Ras-related protein Rab-10 (RAB10) C: centromere protein B (CENPB), centromere protein T (CTBP1), & E3 ubiquitin-protein ligase (CCNB1IP1) D: cyclin-K (CCNK), cyclin-H (CCNH), & protein phosphatase 1 regulatory subunit 7 (PPP1R7)

Butyrate can function as ： A: protein methylation B: Protein acetylation C: Protein phosphorylation D: Protein deacetylation

protein from food or a protein

Which of the following methods is not used by cells to regulate the amount of a protein in the cell A: Genes can be transcribed into mRNA with different efficiencies. B: Many ribosomes can bind to a single mRNA molecule. C: Proteins can be tagged with ubiquitin, marking them for degradation. D: Nuclear pore complexes can regulate the speed at which newly synthesized proteins are exported from the nucleus into the cytoplasm.

Protein from food or a protein supplement acts the same in the body.

Some Chinese kids eat ______ as they actually need every day. A: twice as much protein B: twice protein as much twice C: twice protein as much D: protein as twice much

The protein localization is determined by its sorting signal that directs the protein to the organelle.

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

Protein domain is a __________ part of a given protein sequence that has evolved a specific function.

Which of the followings is Ser/Thr kinase? A: Protein kinase A B: MAPK C: Protein kinase C D: Protein kinase G E: MEK