What is the DNA backbone made of?- a nitrogenous base and a sugar molecule
- nitrogenous bases, sugar, and phosphates
- sugar and phosphates
- a polymer of nitrogenous bases

Answers

Answer 1

Answer:

DNA or deoxyribose nucleic acid is a genetic material, which transmits information from the parent cell to the offspring. It is present in the nucleus or found in the nucleoid.

The correct option is:

Option C. sugar and phosphates

DNA is made up of:

Nitrogenous bases such as adenine, cytosine, thymine, and guanine are involved in the specific pairing that provides the helical structure of DNA.

The DNA consists of a pentosesugar, known as deoxyribose.

The backbone of the DNA is made up of the phosphate group attached with sugar, which provides DNA with a negative charge.

Thus, the DNA backbone is made up of phosphate and pentose sugar.

Therefore, Option C is correct.

To know more about DNA, refer to the following link:

brainly.com/question/264225

Answer 2

Answer:

the answer is C.sugar and phosphates. yw hope that helped :)

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For questions 1-5 decide whether the example is a producer, consumer or decomposer. A rabbit is an example of a _________. Question 1 options: A.Producer B.Consumer C.Decomposer

Answers

a rabbit is a consumer

a consumer eats plants or other animals. Such as: lion, bear, horse, human, etc. Organisms that eat autotrophs; these organisms are called herbivores or primary consumers -- an example is a rabbit that eats grass. The next link in the chain eats herbivores - these are called secondary consumers -- an example is a snake that eats rabbits.

How are the functions of vaccines and antibiotics different?

Answers

Antibiotics are small molecules that are used to treat diseases that are caused by organisms

Vaccines are used to prevent infection to a particular disease.

Hope this helps!

Answer: D

Explanation:

Vaccines cause an immune response to a virus, while antibiotics seek out and kill bacteria cells.

How do healthy ecosystems benifit humans?

Answers

"Ecosystem services are the benefits that people obtain from ecosystems. ... From the availability of adequate food and water, to disease regulation of vectors, pests, and pathogens, human health and well-being depends on these services and conditions from the natural environment." According to the World Health Organization

In an analogy between a factory and a cell: If DNA is the superintendent and mRNA is the order to the assembly line (ribosomes), what might be the role of tRNA?

Answers

The answer is transporter or forklift.

tRNA is actually "transfer RNA". It carries amino acids to the ribosome for protein synthesis. So, it serves as some kind of forklift in the cell - it supplies assembly line with necessary ingredients.

Final answer:

In an analogy between a factory and a cell, tRNA is like the 'delivery truck' that carries the necessary parts (amino acids) to the assembly line (ribosomes). It plays a crucial role in protein synthesis by translating the instructions from DNA and mRNA into a physical protein structure.

Explanation:

In the analogy between a factory and a cell, tRNA might be considered the 'delivery truck' that carries the necessary parts (amino acids) to the assembly line (ribosomes). DNA provides the instructions (genes), mRNA conveys these instructions to the ribosomes, and then tRNA transports the correct amino acids to the ribosomes based on the information in the mRNA. Each tRNA molecule contains an anticodon that matches a specific codon (set of three nucleotides) on the mRNA, allowing it to carry and add the corresponding amino acid to the growing polypeptide chain. This process of translation 'reads' the language of mRNA and translates it into the language of proteins. In other words, tRNA plays an essential role in the synthesis of proteins within a cell, facilitating the transfer of information from DNA and mRNA to a physical, functional protein structure.

Learn more about tRNA here:

brainly.com/question/38578950

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Why are catfish and carp found at the mouth of a river, while trout are found nearer the source?

Answers

Answer:

The correct reason would be "the levels of dissolved oxygen at the mouth of the river and at the source of the river".

The mouth of the river is the region where it flows into the ocean, lake, another river, reservoir, sea et cetera. The level of dissolved oxygen in this region is too low to support great biodiversity.

Organisms like catfish and carp can survive here due to their low oxygen demand. For example, catfish can survive in water with an oxygen content of 2.5 parts per million.

In contrast, the level of dissolved oxygen is higher at the source of the river. Organisms like trout are found here due to their high oxygen need. For example, rainbow trout require minimum 5-6 parts per million dissolved oxygen for its survival.

Catfish and carp require less oxygen than trout. The mouth of a river usually has less oxygen and the area closer to the source has more oxygen, so since catfish and trout require more oxygen they typically are found at the source.

True or False? "Wendell Stanley discovered that the tobacco mosaic virus was not an organism, but was chemical in nature."