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4 years ago

How do the nitrogen bases pairs join in DNA?

1 answer:

6 0

There are 4 nitrogenous bases in DNA. Adenine pairs with thymine, and Guanine pairs with cytosine. A Dna Nucleotide consists of a 5 carbon sugar, a phosphate group and a nitrogenous base. These bases are paired up by weak hydrogen bonds, so when they have have to replicate, the enzyme helicase can easily unzip the Dna.

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Which of the following describes the relationship between elements of an ecosystem

Dennis_Churaev [7]

All elements of a ecosystem work together, the sun provides sun light which plants use photosynthesis for food. Small animals eat the producers aka the plants. Then other animals eat those. And so on if a plant wasn't alive then the whole ecosystem will fail.

7 0

3 years ago

3. Before entering the Krebs cycle, an intermediate molecule bonds to a 2-carbon molecule. This intermediate complex enters into

satela [25.4K]

Answer:

coenzyme A

Explanation:

Coenzyme A is essential. The body produces it and cannot function without it. It facilitates at least 100 chemical reactions in the body. Coenzyme A is considered to be an auxiliary molecule, a chemical that is necessary for the activation of certain enzymes and proteins or important chemical reactions.

Coenzyme A is a molecule - a helper that facilitates the oxidation process. This process leads to the formation of acetyl Coenzyme A - an important substance used for the production of manic acids in a living cell. Without this very important process, there would be no production of fatty acids that maintain the cell membrane.

5 0

3 years ago

You are trying to identify this nucleic acid. all but one observation is an important clue to the nucleic acids identity. that i

irakobra [83]

B.

The other options all tell you the type of nucleic acid it is.

4 0

3 years ago

The trp and lac operons are regulated in various ways. How do bacteria regulate transcription of these operons? Sort the stateme

OLEGan [10]

Answer:

Operon is not transcribed:

-lac operon: lactose absent

-trp operon: tryptophan present

Operon is transcribed, but not sped up through positive control:

-lac operon: lactose and glucose present

-trp operon: tryptophan absent

Operon is transcribed quickly through positive control:

-lac operon: lactose present, glucose not

Explanation:

The trp operon is controlled via negative control only.

Presence of tryptophan will inhibit the transcription of the operon genes

The lac operon is controlled via negative control and positive control.

●Negative control:

--Transcription is turned off due to

active Repressor protein and absence of lactose

--Transcription is turned on due to

Inactive Repressor protein and presence of lactose

●Positive control:

--Transcription rate is higher due to absence of transcription and presence of lactose as a regulatory protein (CAP) adhere to the lac operon promoter

8 0

3 years ago

Study the picture of the ocean. Which is the best example of an organism’s niche shown in the picture? The environment contains

tankabanditka [31]

Image is not provided in the question. The image is attached below for the question.

Answer:

The coral take in food from the water and provide shelter for the fish.

Explanation:

Coral reefs found in marine ecosystem and provide diverse ecosystem on the planet. They play very important role in marine ecosystem such as resist the effect of wave action and tropical storms and protect coastlines and provide shelter and habitat to other marine organism such as small fishes.

The image given shows fish and corals exists together and shows relationship between corals and fishes. This means, Corals take minerals and food from the water and provide shelter to marine animals.

Like this corals functions in the marine system.

Hence, teh correct option is "The coral take in food from the water and provide shelter for the fish".

7 0

3 years ago

Read 2 more answers