BIOCHEM

In the lac operon, the sugar lactose functions as a(n) _____.

• co-repressor

• inhibitor

• Inducer

• repressor

33. The following type of mutation usually results in garbled and premature termination of translation.

• Silent mutation           

• Acceptable Missense Mutation

• Partially acceptable Missense Mutation

• Non-sense mutation

The tetracyclines (eg Doxycycline) bind reversibly to the 30S ribosomal subunit of the virion thus inhibiting replication

• FALSE

• TRUE

What are the elongation factors (EF) in protein synthesis?

• factors that help add codons to the mRNA

• factors that help the polypeptide chain to move into the ER

• factors that help the growth of the polypeptide chain

• factors that help the growth of the mRNA chain

Which BTS member sang the song SEVEN?

• Jungkook

• JHope

• Jin

• Jimin

33. The termination step in protein synthesis occurs when a stop codon happens to be in which of the following positions?

• Exit site

• Peptidyl site

• Deacylated tRNA site

• Aminoacyl site

The genetic code directs the assembly of exactly the same amino acids in almost all organisms, which follows the principle of?

• Universality

• Non-overlapping

• Degeneracy

• Unambiguous

The smallest sequence of DNA involved in producing a polypeptide chain, thus considered the smallest functional unit of genetic expression.

• Cistron

• Operon

• Chromosome

• Codon  

The cell that able to receive recombinant DNA for cloning purpose known as

• vector

• target DNA

• plasmid

• host cell

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil