This would be a covalent bond :)
Answer:
DBAC
(I think, not completely sure though)
Answer: An operon is described as a functioning unit of DNA that possesses cluster of genes, which are present under the control of single promoter. This means that all the genes of operon are transcribed at the same time to form a single polycistronic mRNA strand that codes for multiple proteins.
- An operon primarily consists of operator ( to which repressor protein binds, which is produced by regulatory gene and inhibits the expression of structural genes).
- promoter ( to which RNA polymerase binds and initiates transcription).
- structural genes/genes of an operon that are present downstream of promoter and are transcribed and translated to produce proteins.
Inducer is a protein molecule, binds to regulatory protein and brings change in its conformation so that it can no longer bind to an operator, thus switching on the operon.
Thus, the correct answer for blanks is-
1) operon
2) genes of an operon
3) promoter
4) regulatory gene
5) operator
6) repressor
7) inducer
Answer:
*Thymidine
*THF to DHF
*THF
Explanation:
Normal cells die in a nutrient medium containing thymidine and methotrexate, whereas mutant cells defective in thymidylate synthase survive and grow. The mutant cells grow because the medium contains the_____Thymidine______ they are unable to make normal cells, however, continue to synthesize their own and thereby convert their limited supply of to__THF to DHF______ . The methotrexate inhibits , so cannot be regenerated. Without a supply of______THF_____ for the synthesis of nucleotides and amino acids, the cells die.
NOTE:
THF means Tetrahydrofolate
DHF means Dihydrofolate
Thymidine which is also reffered to as deoxythymidine, is described as a deoxynucleoside that is composed of the pyrimidine base thymine that is attached to the sugar deoxyribose. Thymidine is a nucleoside made up of pentose sugar, pyrimidine base tymine and deoxyribose, it is one of the the four nucleoside found in exclusively DNA as well as T-loop of tRNA.
Tetrahydrofolate also known as tetrahydrofolic acid can be described as part of folic acid that function as a coenzyme which aid metabolic reactions that includes nucleic acid and amino acids. It is also reffered to as one-carbon metabolism, and it's oone-carbon mechanism is associated to the histidine, serine of amino acid.
Answer: Auxin
Apical dominance in plants is under the control of auxin
Explanation:
Auxin is a plant hormone that controls cell elongation, delay in falling of leaves, flowering, fruiting, increase in respiration and apical dominance.
Apical dominance refers to the inhibition of terminal bud upon the development of lateral buds in the plant, and it is controlled by Auxin.