Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
a) The deacetylation of histones generally causes gene inactivation. True or false?
b)During eukaryotic translation, the first contact between the ribosome and the mRNA is usually made when the small ribosomal subunit directly binds to the translational start site (Kozak sequence) on the mRNA. True or false?
c)The termination of translation is carried out by a single tRNA molecule that recognizes all three stop codons. True or false?
d) The deamination of cytosine, which produces uracil, is less likely to be repaired, compared to the deamination of 5-methylcytosine, which produces thymine.True or false?
e)An HLH-bHLH heterodimer can bind DNA. True or false?
F)Chromatin remodeling complexes posseses ATPase activity. True or false?
g)Histone methylation generally causes gene inactivation. True or false?
h) A pre-mRNA is cleaved downstream of its polyA signal before the transcription terminates. True or false?
i) During X chromosome inactivation in female mammals, most genes are repressed on an inactive X chromosome. True or false?
mark statements as true or false.
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