Answer: D) cAMP
Explanation:
In the absence of glucose cell can make use of other sources of carbohydrates such as lactose. In E. Coli and other bacteria utilization of lactose depends on the availability of cAMP. Bacteria accumulate cAMP only when starved. When glucose is exhausted, cAMP is available in plenty.
cAMP is necessary for the gene expression because it binds catabolite repressor protein (CAP) to form CAP-cAMP complex. CAP is a lac repressor the binds to the operator site of the lac operon preventing RNAP From binding to the promoter.
RNA polymerase can bind to the promoter site only when CAP-cAMP formed
Answer:
DNA sequencing
Explanation:
DNA sequencing is a technique which helps in determining the DNA sequence of any organism. In the human genome project, all the bases that make DNA in humans are sequenced which helped doctors to determine the cause of many genetic diseases and also their treatment.
Hairlessness in dogs can be genetic and the mutated gene can be determined by sequencing the DNA of hairless dog and comparing it with the normal DNA sequence of dog. Therefore the correct answer is DNA sequencing.
Answer:
A hydrophobic hormone with an intracellular receptor.
Explanation:
Because of their chemical nature, hydrophobic hormones (like steroid or thyroid hormones) can cross the cell membrane and bind to its intracellular receptor forming a hormone-receptor complex. This complex will then bind a specific segment of the DNA and will act a transcription factor.
Answer:a) 1,5,2,4,3
Explanation: skeletal muscles function together with the skeleton to allow movement .a muscle is enclosed by a layer of connective tissue ,the epimysium.this connective tissue surrounds Smaller bundles called the fasciculi.
These fasciculi consist of still smaller multinucleated fibres.
These fibres consists of myofibrils which also consists of small protein filaments,the actin and myosin filaments.the myosin filaments are thicker than the actin filaments.
