Which of the following enclose their DNA in a nucleus?

Answers

Answer 1
Answer:

Eukaryotes are referred to as the organisms who enclose their DNA in a nucleus.

What is an Eukaryote?

These are organisms which possess a nuclear membrane which is uses to enclose DNA in their nucleus.

Examples of eukaryoticorganisms include plants and animals which was why it was chosen as the most appropriate choice.

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Answer 2
Answer:

Final answer:

Eukaryotic cells are the type of organisms that enclose their DNA within a nucleus, through a structure called nucleosomes formed by wrapping DNA around proteins known as histones.

Explanation:

The organisms that enclose their DNA in a nucleus are known as eukaryotes. These cells use a unique packing strategy to fit their DNA inside the nucleus. At the very basic level, their DNA is wrapped around proteins called histones to create structures referred to as nucleosomes. The DNA is then tightly packed around the histone core, creating a 'beads on a string' structure. This structure is further compressed into a 30 nm fiber. When a cell is about to divide, chromosomes are condensed to approximately 700 nm in width, which represents their most compact stage.

The nucleus is surrounded by a nuclear envelope studded with protein-lined pores, allowing for the trafficking of materials in and out of the nucleus. It also contains nucleoli, which serve as sites for ribosome synthesis. Hence, DNA in eukaryotic cells is contained within the nucleus, either as loose chromatin or tightly coiled chromosomes when cell division is impending.

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Each antibody has at least ______ binding sites that bind to a small portion of the antigen called the ________.

Answers

Im pretty sure its Two, epitope

The head of a phospholipid can be descibed as

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Phospholipids are a class of lipids and are a major component of all cell membranes as they can form lipid bilayers. Most phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline. 

Amphipathic character 
The 'head' of a phospholipid is hydrophilic (attracted to water - polar), while the hydrophobic (non-polar) 'tails' repel water. The hydrophillic head contains the negatively charged phosphate group, and may contain other polar groups. The hydrophobic tail usually consists of long fatty acid non-polar hydrocarbon chains.

Which carbohydrate can be used by the body as an immediate source of energy?

Answers

Glucose

Carbohydrates actually get stored in the form of long polymers of glucose molecules or as glycogen starch. They provide energy to the animals for performing their daily duties. Carbohydrates are generally considered the fuel for all organisms, and without this most animals would become sloth and would be unable to perform the regular jobs. Carbohydrates are actually very easy to metabolise and hence generate quick energy. 

Final answer:

The carbohydrate that serves as an immediate source of energy for the body is glucose. It can be derived directly from dietary sugars and carbs, or produced from glycogen when these are unavailable. Among all macromolecules our body processes, carbohydrates are the main energy source, and glucose is the most widely used monosaccharide for ATP production in cells.

Explanation:

The carbohydrate that can be used by the body as an immediate source of energy is glucose. Derived from the digestion of sugars and other carbohydrates in our diet, glucose is the primary energy source for the body. Free blood glucose serves as a readily available fuel for the body's many processes and functions.

When dietary sugars and carbs are absent, glucose is obtained from the breakdown of glycogen, a storage form of glucose, primarily found in the liver and skeletal muscles. In terms of other macromolecules that the body processes, such as lipids, proteins, and nucleic acids, carbohydrates are the most commonly used energy source.

Carbohydrates come in the form of complex carbohydrates or polysaccharides like starch and glycogen, or simple sugars or monosaccharides like glucose and fructose. Through a process called sugar catabolism, polysaccharides are broken down into individual monosaccharides, with glucose being the most common fuel for ATP production in cells.

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Which of the following kingdoms contains prokaryotes?A. Plantae
B. Protista
C. Eubacteria
D. Fungi
I think it is Eubacteria but im not for sure

Answers

The correct answer is C. Eubacteria. They are commonly referred to as just bacteria and are prokaryotic because they don't have nuclei. Other mentioned plants here have the nucleus, that is the kayros, so they are eukaryotic, meaning that they are more complex. Bacteria don't have nuclei or differentiated organelles or walls.

Briefly explain ways cars may become more energy efficient in the future

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Where people believe that public transport is better than cars because it is better suited for more people, its cheaper, less pollution and more energy efficient. On the other hand some people have this perspective that cars may become more energy efficient in future containing diesel engines, will be hybrid, fully electric and plug-in electric.

Myelinated nerve fibers that rapidly transmit acute pain information from the sensory fibers to the central nervous system are _______

Answers

Answer:

Delta fibers.

Explanation:

Myelinated fibers may be defied as the fibers that are covered by the myelin sheath. Three different classes of nerve fibers are group A nerve fibers, B fibers and C fibers.

Delta fibers are the type of group A fibers. These fibers are involved in the transmission of the acute pain information. The information is transferred from the sensory fibers to the central nervous system. These delta fibers can carry information faster and they are larger than the C fibers.

Thus, the correct answer is delta fibers.