Biology, 01.12.2019 08:31, thutch1950oww9q0

Each of the mutants listed below this paragraph has a different mutant form of the gene encoding protein x. each mutant gene contains one or more nucleotide insertions (+) or deletions (−) of the type caused by acridine dyes. assume that all the mutations are located very near the beginning of the gene for protein x. in each case, indicate with an "ok" if you would expect the mutant protein to be nearly normal and with a "not ok" if you would expect it to be obviously abnormal.
-/-/+/-/- , +/-/+ , +/-/+/- , +/+/-/+ , -/+ , - , -/-/-/-/-/- , +/+/+ , -/-

Answers: 3

Show answers

Answers

It should be taken into consideration the presence of frameshift mutations. Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and consequently in changed protein. But it is known that 3 nucleotides on mRNA code for the specific amino acid. If the number of inserted or deleted nucleotides is 3, it will result in the absence of only 1 amino acid which is not expected to drastically change protein sequence.
Knowing all this, it can be concluded the following:

-/-/+/-/- OK - Due to 4 deletions and 1 insertion, effectively only 3 nucleotides are missing.
+/-/+ Not OK - Due to 1 deletion and 2 insertions, effectively only 1 nucleotide is added leading to the frameshift mutation.
+/-/+/- OK - Due to 2 deletions and 2 insertions, a number of nucleotides remain the same.
+/+/-/+ Not OK - Due to 1 deletion and 3 insertions, effectively only 2 nucleotides are added and the frameshift mutation occurs.
-/+ OK - Due 1 deletion and 1 insertion, a number of nucleotides remain the same.
- Not OK - Due to 1 deletion, the frameshift mutation occurs.
-/-/-/-/-/- OK - Due to 6 deletions, it will be deleted 2 amino acids and the protein will be nearly normal.
+/+/+ OK - Due to 3 insertions, 1 amino acid will be added in excess.
-/- Not OK - Due to 2 deletions, the frameshift mutation occurs.

answered: Guest

B] nitrogen fixationmight be wrong, so correct me.want extra on your answers? just go on my account and go on questions and answer, or ask in the comments!

answered: Guest

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.

Other questions on the subject: Biology

Biology, 21.06.2019 16:30, Abbymay17

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u. s. and mexico. the st. lawrence seaway provides an important trading route for the u. s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

Answers: 2

continue

Biology, 21.06.2019 23:50, whitethunder05

Where can you find prokaryotic and eukaryotic cells?

Answers: 2

continue

Biology, 22.06.2019 04:10, goldenhawk239

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.

Answers: 1

continue

Biology, 22.06.2019 13:00, Brooke7644

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.

Answers: 3

continue

Do you know the correct answer?

Each of the mutants listed below this paragraph has a different mutant form of the gene encoding pro...