quiz

a base in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is what (include directionality)?

3' UCA 5'

Which of the following does not occur in prokaryotic gene expression, but does in eukaryotic gene expression?

A poly-A tail is added to the 3' end of an mRNA and a cap is added to the 5' end.

A new DNA strand elongates only in the 5' to 3' direction because

DNA polymerase can only add nucleotides to the free 3' end.

If one strand of DNA is CGGTAC, then the corresponding strand would be

GCCATC

What is meant by the description "antiparallel" regarding the strands that make up DNA?

The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand.

How would the shape of a DNA molecule change if adenine paired with guanine and cytosine paired with thymine?

The DNA molecule would have irregular widths along its length.

You have two flasks (labeled A and B) that each contain an equal population of normal animal cells. You place flask A in a machine called a shaking incubator, which shakes the flask at 37°C and keeps the cells moving so as to not allow them to adhere to the bottom of the flask. Flask B is allowed to sit in an incubator (without shaking) at 37°C. If you let the cells in each flask grow for a week, which of the following results are you most likely to observe?

The cells in flask B will have grown significantly, but the cells in flask A will have not grown much.

the genetic code is essentially the same for all organism. from this one can logically assume which of the following?

a gene from an organisms can theoretically be expressed by any other organism

the decline of MPF activity at the end of mitosis is due to...

degradation of cyclin

As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of

density dependent inhibition

the elongation of the leading strand during DNA synthesis...

depends on the action of DNA polymerase

drug X is developed as a chemotherapeutic drug used to treat cancer because its affects microtubules, its effectiveness must be related to:

disruption of mitotic spindle formation

transcription in eukaryotes requires which of the following in addition to RNA polymerase?

several transcription factors

the TATA sequence is found only several nucleotides away from the start site of transcription. this most probably relates to which of the following?

the number of hydrogen bonds between A and T in DNA

which is the first even to take place in translation in eukaryotes?

the small submit of the ribosome recognizes and attaches to the 5' cap of mRNA