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blondinia [14]
2 years ago
15

Question 1

Biology
1 answer:
Olegator [25]2 years ago
3 0

Answer:

uracil pairs with guanine hope it helps

2

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What is the effect on transcription of the structural and regulatory genes of the lac operon when lactose is present in the envi
vova2212 [387]

In the lac operon, glucose also plays an important role along with lactose. When Lactose is present in the environment along with glucose then it cannot deactivate the regulator gene [repressor], as a result, the repressor will bind to the operator and the transcription will be blocked.

When Lactose is present in the environment without glucose then the Catabolite repressor protein will bind to the CAP Site, and lactose will bind to the repressor [regulatory gene product], as a result, the repressor gets deactivated and the transcription takes place.

Lac operon: It is a set of three structural genes z, y, and a which are all transcribed and regulated under one single promoter. The three genes code for β-galactosidase, lactose permease, and transacetylase respectively.

β-galactosidase is responsible for breaking the lactose into glucose and galactose, lactose permease is responsible for transporting lactose across the cell membrane and transacetylase attaches a particular chemical group to target molecules.

Learn more about Lac operon here

brainly.com/question/1217140

#SPJ4

7 0
2 years ago
When a single creature, or a whole species, changes in order to better fit their environment it is called
PolarNik [594]
I believe it is adaptation

6 0
3 years ago
Read 2 more answers
Which of the following is an indicator of good water quality?
slavikrds [6]
 i think it might be  b

8 0
3 years ago
When was mars discovered?
const2013 [10]
Mars<span> was </span>discovered<span> by visual observation without instruments. The first mention of observations of </span>Mars<span> occurred in ancient Egyptian records dating back thousands of years. In 1610, Galileo Galilei was the first person to observe </span>Mars<span> through a telescope. hope that helped</span>
4 0
3 years ago
The four main types of pest
-Dominant- [34]

Answer:

1) Insect

2) Mites

3) Rodents

4) Animals

5) Birds

Explanation:

1)  These are significant and significant pests. Insects have three pairs of legs, two pairs of wings, a segmented body, and complex eyes and antennae that are unique to them. Insects are smart, extracting sap from plants, biting plant parts, burrowing into fruits, twigs, and leaves, attacking roots, barks, and blooms, among other things. Larvae, adults, and nymphs are the stages of insect pests that cause harm.

2) These are insect-like organisms with a soft body and four pairs of legs. The colour of these small organisms is red or pastel yellow. They feed on the plant's sap and attack the crops in large numbers.

3) This bug consumes a considerable amount of human food and causes widespread crop damage. They're also to blame for massive grain losses on fields, in warehouses, and in homes.

4) Wild boars, deer, elephants, buffalo, jackals, monkeys, and squirrels are among the animals that inflict direct harm to agricultural plants. They devour the plants and, as a result, squander a tremendous amount of food.

5) Birds devour grains and destroy crop plants. Crows, parrots, and sparrows are among the most common birds that prey on crops.

(Hope this helps can I pls have brainlist (crown)☺️)

4 0
3 years ago
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