BIOLOGY HIGH SCHOOL

Which prevents the Lac genes in the DNA of E. coli from being expressed most of the time

Answers

Answer 1
Answer: The Lac repressor prevents the Lac genes in the DNA of E.coli from being expressed most of the time. The Lac repressor is actually a kind of DNA binding protein. It is a fact that in case there is an absence of lactose, the Lac repressor binds to the proteins. I hope that this answer comes to your help.
Answer 2
Answer:

Answer:

The correct answer would be lac repressor.

Lac repressor refers to the DNA binding protein which inhibits or prevents the expression of genes in the DNA of Lac Operon.

The lac repressor protein is expressed by the Lac regulatory region.

It binds to the operator region of the operon and prevents the binding of RNA polymerase.

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Name 3 physiological processes of cell membrane?{3mks} plz help me guys

Answers

Answer:

the cell membrane is an extremely pliable structure composed primarily of back -to- back phospholipids (a "bilayer")

The structures found within the skeletal system perform different functions within the body. Which of the following is not a function of bones in the human skeletal system?a. store minerals
c. move body parts
b. regulate body temperature
d. protect organs

Answers

your answer is C, 
Our body stores calcium, and other minerals
our body temp is also regulated by our skeletal system
and our skeleton protects vital organs

What structure prevents food and liquids from entering the trachea? what structure prevents food and liquids from entering the trachea? glottis larynx vestibular folds epiglottis?

Answers

the epiglottis prevents food from entering the trachea

Final answer:

The epiglottis is the structure that prevents food and liquids from entering the trachea. It is a flap of tissue that blocks the entrance to the trachea when you swallow. The larynx, glottis, and vestibular folds are part of the throat but do not prevent food and liquid from entering the trachea.

Explanation:

The structure that prevents food and liquids from entering the trachea is the epiglottis. The epiglottis is a flap of tissue that sits at the base of the tongue. When you swallow, this flap blocks the entrance to the trachea, directing food and liquids down the esophagus and into the stomach, rather than into your lungs. The larynx, glottis, and vestibular folds are also part of the throat anatomy, but they do not have the primary function of preventing food and liquid from entering the trachea.

Learn more about Epiglottis here:

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What is the definition of genes?

Answers

In scientific theory, genes are organisms that are transferred from a parent cell to the offspring. Overtime, it will determine some of the traits the offspring is taken from either parent.

Which of the following is true about organizing items and information during scientific investigations?a Items and information must be organized differently each time an investigation is repeated.

b There is only one method for organizing items and information in a scientific investigation.

c There are usually multiple methods for organizing items and information in a scientific investigation.

d No two investigations can use the same method for organizing items and information.

Answers

Answer:

Option C, There are usually multiple methods for organizing items and information in a scientific investigation.

Explanation:

In a scientific investigation data can be arranged in different manners for instance same data can be represented as a line graph, bar graph, data table, pie chart or even a co-relation graph.

Like wise the information during a scientific investigation can also be arranged in multiple ways such as a research paper, an article in some research magazine , a blog on internet, as a presentation on some acclaimed educational portal   etc.

Hence, option C is correct
The correct answer is C.

Which multicellular invertebrate uses tentacles with stinging cells to capture prey?A. jellyfish
B. sponges
C. tapeworms
D. heart worms

Answers

A jelly fish is the answer , these jelly fish has tentacles which stings prey , or anything for this matter , but prey is captured by them 
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