If the green nitrogen base in the DNA model represents adenine, the blue nitrogen base COULD representA) adenine
B) guanine
Eliminate
C) thymine
D) uracil

Answers

Answer 1

Answer:

Answer: The correct answer is-

B) guanine.

DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotides. A nucleotide is hat is composed of -

1)nitrogenous base, which can be Adenine, Thymine, Guanine, Cytosine

2) Phosphate group, 3) Deoxyribose sugar.

In a DNA molecule, Adenine pairs with Thymine, and Guanine pairs with Cytosine as per the Watson and Crick base pairing.

If the green nitrogen base in the DNA model represents adenine, this indicates that thymine will also be green ( as it pairs with adenine).

Thus, the blue nitrogenous base will be represented by Guanine.

Answer 2

Answer:

Answer:

B) guanine

Explanation:

I just took the test

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Which best describes viruses? Viruses are nonliving infectious agents. Viruses can replicate without a host cell. Viruses can be killed by strong antibiotics. Viruses are similar to bacterial cells.

Answers

The option that best describes viruses is: Viruses are nonliving infectious agents. Viruses cannot replicate on their own and they need a host cell in order to survive. Antibiotics kill bacteria but not viruses. Antivirals and vaccines are made available to decrease the production of viruses, but not totally stopping them. Bacteria and virus differ in so many ways.

The option that best describes viruses is: Viruses are nonliving infectious agents. thus option A is correct.

What is viruses?

A virus is an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.

Viruses cannot replicate on their own and they need a host cell in order to survive. Antibiotics kill bacteria but not viruses. Antivirals and vaccines are made available to decrease the production of viruses, but not totally stopping them. Bacteria and virus differ in so many ways. so, option A is correct.

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what are the four types of stem cell? and give an example of each type, and explain how much each type can differentiate.

Answers

The four types of stem cells are as follows:

Totipotent Stem cell: The ability of a cell to divide and produce all of the differentiated cells in an organism is called totipotency. Examples are spores and zygotes.
Pluripotent Stem cell: A stem cell that has the potential to differentiate any of the three germ layers i.e. endoderm, mesoderm, and ectoderm. Examples are all embryonic cells.
Multipotent Stem cell: A stem cell that has the ability to differentiate into a number of cell types only those a closely related family of cells. An example includes blood stem cells.
Unipotent Stem cell: A stem cell that has the ability to differentiate into only one type of cell. For example, lymphoid cells like NK cells, T cells, B cells, etc.

What are Stem cells?

Stem cells may be defined as a type of cell that can significantly divide and in doing so produce a replica of itself as well as a daughter cell that can undergo further development and differentiation.

Therefore, the four types of stem cells along with examples are differentiation are well described above.

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Embryonic stem cells
Tissue-specific stem cells
Mesenchymal stem cells
Induced pluripotent stem cells

White spotting, or piebald trait, characterized by an absence of hair pigment in specific places, is caused by mutant copies of a A) carbohydrate. B) gene. C) lipid. D) steroid

Answers

Answer: Gene

Explanation:

Mutation can be defined as the change in the single base pair of the DNA. Each and every trait inside an eukaryotic organism body is controlled by the help of the gene.

Pie bald is also a trait controlled by the genes in the body. Pie bald can be defined as a pattern of unpigmented spots on the pigmented background of scale, feather and hair.

Example: A pie bald black and white dog is a black dog with white spots on it.

B. Gene. Piebalding is caused by mutant copies of genes.

From a population of red brown orange yellow and green butterflies only the red and green ones survive since they can blend into their environment and reduce predation. Which evolutionary mechanism is involved?

Answers

The evolutionary mechanism involved is genetic drift. Of the butterfly population, the red and green butterflies survived due to their ability to camouflage into their environment while the brown, orange and yellow butterflies did not because of their wing colors.

Is a nucleic acid that contains the genetic information for heredity in most organisms.A. a chromosome
B. genetics
C. a gene
D. heredity
E. DNA

Answers

The correct answer is E. DNA

DNA stands for Deoxyribonucleic acid which is a nucleic acid with genetic material.

Answer:

dna

Explanation:

What element is found in all living things. It is recycled when organisms die. It is transformed from one form to another through photosynthesis and cellular respiration.