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Nucleotides contain sugar, a phosphate group, and a nitrogen base. Which of the following is a nitrogen base?


ribose

guanine

tyrosine

deoxyribose

Biology A Semester Exam

this is all the answers 1 to 28








b,guanine

c 2and3

a, Exothermic reactions tend to release heat energy to the surrounding environment

d It may be reliable because they cited multiple high-quality studies from scientific journals

c osmosis

b, Rough endoplasmic reticulum has ribosomes attached to its surface

d cell wall

c skeletal

d, break down starch.

a, respiratory and circulatory

d , the thylakoid membrane of the chloroplast

b, 41 Calories is less than 410 kcal

d, lactic acid

b , phosphate group.

b, deletion mutation

a, 25%

d, The viral genome incorporates into the host genome during the lysogenic cycle

d, totipotent stem cells → pluripotent stem cells → multipotent stem cells → neuron

b Gene expression is different between different specialized cells.

c DNA

d, a model that illustrates how a cell divides into two identical cells

c 1and2

c an insertion mutation in an egg cell that deactivates a gene for hair color, resulting in a viable error

c epigenetics

a, Bottleneck effect, because it means most cheetahs could succumb to the same environmental stresses

a, A pair of homologous chromosomes fails to separate during anaphase I of meiosis.

a polygenic

this is 9 grade biology

hope this helps i just finished the test

Sagot :

Guanine is a nitrogen base from the given options contained in

Nucleotides.

What is Nucleotides?

Nucleotides are the building blocks of DNA and RNA, which are the nucleic acids that carry genetic information in living organisms. They are organic molecules made up of a nitrogenous base, a five-carbon sugar and a phosphate group. The four different nitrogenous bases found in nucleotides are adenine, guanine, cytosine, and thymine.

Guanine is one of the four main nitrogenous bases found in nucleotides, along with adenine, cytosine, and thymine. It is a purine base that is found in both DNA and RNA.

What is a nitrogen base?

A nitrogen base is an organic compound that contains nitrogen and is an essential component of nucleic acids, such as DNA and RNA. Nitrogen bases are classified into two groups: purines and pyrimidines. Purines are composed of two fused rings of carbon and nitrogen atoms, while pyrimidines are composed of just one ring of carbon and nitrogen atoms.

Therefore, the correct option is Option B.

To know more about Guanine,

https://brainly.com/question/3372278

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