Ans.
Lac (lactose) operon in a type of bacterial operon, which shows a cluster of genes that are regulated by a single promoter. It is composed of an operator, promoter, a terminator, and three structural genes (lacA, lacY, and lacZ), which are responsible for the transport and breakdown of lactose.
The lac operon is an inducible operon as it gets activated in the presence of lactose and expressed its functional genes in the form of proteins (or enzymes) for lactose metabolism.
Thus, the correct answer to be fill in first blank is 'inducible' and in second blank is 'lactose.'
Answer:
RNA interference
Explanation:
Interference RNA is a mechanism of post-transcriptional silencing of specific genes, so that small RNA molecules complementary to an mRNA lead to its degradation, thus preventing its translation into proteins.
Gene silencing by interfering RNA is induced by small double stranded RNA molecules of 21 to 27 nucleotides called siRNA. These siRNAs undergo a series of processes in the cell as a result of which their double stranded RNA unfolds in a sense strand and an antisense strand. The antisense strand binds to the mRNA chain specifically for base complementarity, causing the resulting complex to be recognized by cellular and degraded mechanisms. Each siRNA is highly specific for the target nucleotide sequence to which it degrades. This phenomenon of gene interference occurs naturally in the body, being involved in the development and defense against viruses.
Answer:
The northwest moving Pacific Plate has moved across the 'hot spot' that created the Hawaiian Islands for millions of years. This movement has left the northwest trending island chain
Explanation:
If the Pacific Plate keeps moving across the hot spot I believe Hawaii will keep becoming a bigger island because the Pacific plates movement caused Hawaii to form.
Answer:
x y
x8 x8x x8y
x8 x8x x8y
The results of the punnet square show that:
They will not have a son who will be colour blind.
They will not have a daughter who is colour blind.
All the daughters born will be carriers of red- green colour blindness.
The genotype of the two parents will be:
Genotype of mother: x8,x8
Genotype of father: x, Y
There really is no way unless both the parents are the are tall or short
