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Ivahew [28]
3 years ago
7

When is gene expression blocked in the lac operon system?

Biology
2 answers:
PilotLPTM [1.2K]3 years ago
8 0
The repressor protein blocks the genes from making mRNA.
elena-s [515]3 years ago
4 0

The depressor protein blocks the genes from making mRNA.

Absolutely sure!

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Can someone plz help me? :(
elena-s [515]

Answer:

your answers are gonna be a,c and d

Explanation:

6 0
2 years ago
Read 2 more answers
Identify correct statement from the following
SpyIntel [72]

Answer:

The answer is statement 1, 2, and 3

Explanation:

A hypothesis is a starting point for further investigation, therefore a hypothesis will always be a possibility at least until it is tested.

Variable is a factor that is liable to vary or change.

A hypothesis without being tested is merely a statement or an explanation made on the basis of limited evidence. Therefore it is unsure whether the said statement is true or not.

A hypothesis can still be proven by further investigation with different variables

6 0
3 years ago
two pure breeding lines of pea, one tall and hairy, the other short and smooth, are crossed. the f1 hybrid is tall and hairy. th
wolverine [178]

The genotypes A B_, A bb, aaB_, and aabb are matched to the four phenotypic groups.

<h3>How do phenotypic classifications work?</h3>

The genotypes A B_, A bb, aaB_, and aabb are matched to the four phenotypic groups. If any of the single homozygous recessive genotypes (i.e., A bb or aaB_) exhibits the same phenotype as the double homozygous recessive (aabb), then a 9:3:4 phenotypic ratio will result.

<h3>What does phenotypic classification entail?</h3>

phenotype, all of an organism's observable traits that emerge from the interaction of its genotype (total genetic inheritance) and environment. Observable features include things like behavior, biological characteristics, colour, shape, and size.

To know more about phenotypic visit:-

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8 0
1 year ago
The extra cellular matrix on most connective tissues is made up of predominantly fibers and what?
dalvyx [7]

Answer:

The correct answer will be- proteoglycans and the glycoproteins

Explanation:

The connective tissue forms a very large proportion of the total mass of a body. The connective tissue plays a distinct role in the body like the movement of the cell, mechanical support, wound healing but the main role is to connect different tissues of the body.

The property of the connective tissue is determined by the amount and type of the extracellular matrix present which contains three main components which are the fibres like collagen, glycoproteins and the proteoglycans.

Thus, proteoglycans and glycoproteins are the correct options.

6 0
3 years ago
In a certain species of plant, the color purple (P) is dominant to the color white (p). According to the Punnett Square, what is
stiks02 [169]

Answer:

If both are (PP and ww) and one is dominant the other is recessive then it is 100%  purple.

IF both are heterozygous (pw) then it is 75% purple and 25% white

if one is Hetro(pw) and the other is (ww) 50% white 50% purple

Explanation:

4 0
3 years ago
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