16- inherited change

Question 1

genom

Answer 1

entire genetic info present in a person’s CELL

Question 2

regulatory gene

Answer 2

encode proteins regulating EXPRESSIOn of structural genes

Question 3

promoter region

Answer 3

site where RNA polymerase binds to initiate transcription

Question 4

operator region

Answer 4

sequence where regulatory proteins(repressor) bind

Question 5

structural genes

Answer 5

genes coding for proteins(enzymes) [lacz,lacy,laca]

Question 6

lacZ codes for

Answer 6

β-galactosidase

Question 7

lacY codes for

Answer 7

lactose permease

Question 8

lacZ codes for

Answer 8

transacetylase

Question 9

inducible enzyme

Answer 9

only produced when substrate available

Question 10

repressible enzyme

Answer 10

normally produced continuously but their production can be inhibited when not required

Question 11

transcription factors

Answer 11

proteins that bind to DNA sequences to initiate transcription of genes into mRNA

Question 12

need for reduction division in meiosis

Answer 12

• produce haploid chromosomes that form gametes, fuse to form diploid zygote
• produce genetically different alleles
• haploid chromosomes regulated in sexual reproductivity
• prevent chromosome doubling in next generation

Question 13

haploid
diploid

Answer 13

one complete set of chromosomes (n)
two complete sets of chromosomes (2n)