Answer:
the third one is correct
explanation
because atomic number and proton &electron number is same . neutron number is solved as atomic mass minus atomic number ( N=atomic mass - atomic number)
Answer:
See the answer below
Explanation:
The Chi-square (
) is calculated by the formula:
= 
where O = observed frequency and E = expected frequency
A standard dihybrid cross is expected to give 9:3:3:1 phenotypic ratio.
Phenotype O E
Round yellow 104 9/16 x 160 = 90 
= 2.18
Round green 27 3/16 x 160 = 30 
= 0.30
wringled yellow 27 3/16 x 160 = 30 = 0.30
wrinkled green 2 1/16 x 160 = 10 
= 6.40
Total value to two decimal places = 9.18
Degree of freedom = (n-1) = 4 -1 = 3
Critical value at 95% probabillity level = 7.815
<em>Since the calculated </em><em> si more than the critical </em><em> value, </em><em>the null hypothesis is rejected. </em>
Answer:
D.They contain a regulatory domain that is functional when removed from the DNA-binding domain.
Explanation:
Transcriptional activators are transcriptional factors that positively regulate transcription of the gene (increase gene transcription). They usually contain two functional domains:
- DNA-binding domain which interacts with DNA
- Activation domain which interacts with other proteins.
Mechanism of action of activators includes their binding to the enhancers (DNA sequences) and recruitment of RNA polymerase II to the promoter.
The correct answer is mitosis.
Mitosis is a part of the cell cycle and it is actually a cell division. The mother cell is divided to produce two new genetically identical daughter cells. It is important that during the mitosis is that each daughter cell gets a full set of chromosomes.
