Question

1. A codon is present in ____. An anticodon is found in ___. The 5'- AUC-3' codon, will base pair with the 5'- _____3' anticodon

a)mRNA,tRNA,UAG

b)mRNA,tRNA,GAT

c)DNA,mRNA,GAU

d) mRNA, tRNA, GAU

e) DNA,mRNA,CUA

31. The existence of Okazaki fragments supports the ___ model of DNA replication

a) semi-conservative

b)bidirectional

c) conservative

d) continious

e)semi-discontiniouus

32. The human immunodeficiency virus (HIV) a retrovirus injects its genomic material composed of ___ into the host t cell; this must be ___ into___ before viral proteins can be produced?

a) DNA, translated, protiens

b) RNA, translated, protiens

c) DNA, reverse-transcribed, RNA

d)RNA, reverse0transcribed, DNA

Answer 1

1. a codon is present in mRNA . an anticodon is present in tRNA . the 5'-AUC-3' codon , will base pair with the 5'-UAG-3' anticodon. (a) the genetic code is a triplet code called a codon.

2. the existence of okazaki fragments supports the semi discontinuos model of DNA replication . in this one strand is synthesised continuosly while the other is synthesised discontinuosly. leading strand synthesis occurs continuosly in 5' to 3' direction, while lagging strand synthesis occurs discontinuosly in 5' to 3' direction. (e)

3. the HIV virus , a retrovirus injects its genomic material composed of RNA into the host cell; this must be reverse transcribed into DNA before viral proteins can be produced.

this reaction is catalyzed by reverse transcriptase