It is given that a protein has a molecular weight (Mw) of 21342. It consists of 180 amino acids of which 80 are glutamine (Mw of anhydro residue = 128.1), 60 are histidine (Mw of anhydro residue 137.2) and 40 alanine (Mw of anhydro residue 71.1). At both the C-terminal and the N-terminal position an alanine residue is present.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.