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3 years ago

Is DNA usually a string of nucleotides

2 answers:

7 0

DNA is made up of three subunits: a deoxyribose 5 carbon sugar, a phosphorous group, and a nitrogenous base (adenine, thymine, guanine, cytosine). All in all, these are called nucleotides that wrap around in a double helix in order to form DNA.

Svetlanka [38]3 years ago

4 0

In living organisms DNA does not usually exist as a single molecule, but ...... Levene suggested that DNAconsisted of a string of nucleotide units

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Which question can be answered by an experiment?

Zigmanuir [339]

I’m pretty sure it’s B

7 0

3 years ago

Why is sugar considered a compound?

san4es73 [151]

Answer:

It is a compound because it has 2 or more element joined together. In this case it is hydrogen/oxygen and carbon.

Explanation:

8 0

3 years ago

In cats, the Dense pigment gene, D/d, codes for melanophilin, a protein involved in the transportation and deposition of pigment

SVETLANKA909090 [29]

Answer:

a. M_D_ : 9/16 Black furred individuals

b. M__dd : 3/16 gray furred individuals (1/16 MMdd + 2/16 Mmdd)

c. mmD_ : 3/16 Brow-furred individuals (1/16 mmDD + 2/16 mmDd)

d. mmdd: 1/16 gray furred individuals.

Explanation:

Available data:

Dense pigment gene, D, codes for melanophilin.
D allele dominant over d.
Gene M/m is responsible for the production of the pigment
M is dominant over m
If D is present, M/m is expressed
If dd is present, M/m is not expressed
DDMM, DdMM, DDMm, DdMm --->Black fur
DDmm, Ddmm ---> Brown fur
ddMM, ddMm -----> Light gray fur

Cross: between two dihybrids

Parental) DdMm x DdMm

Phenotype) Black-furred Black-furred

Gametes) DM, Dm, dM, dm DM, Dm, dM, dm

Punnet Square) DM Dm dM dm

DM DDMM DDMm DdMM DdMm

Dm DDMm DDmm DdMm Ddmm

dM DdMM DdMm ddMM ddMm

dm DdMm Ddmm ddMm ddmm

F1) 9/16 Black-furred individuals, D-M- (1/16 DDMM + 2/16 DDMm + 2/16

DdMM + 4/16 DdMm)

3/16 Brown-furred individuals, D-mm ( 1/16 DDmm + 2/16 Ddmm)

4/16 Gray-furred individuals, dd-- ( 1/16ddMM + 1/16 ddmm + 2/16 ddMm)

7 0

3 years ago

What characteristics does carbon have that explain why it can do that?

BARSIC [14]

Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.

3 0

3 years ago

“Many species of roundworms are parasites of plants and animals. How is a roundworm’s body plan related to its function as a par

Ugo [173]

The roundworm's body is a function of a parasite because it gets stronger when it eats digested food in animal's body and that harms the animal. They are in the same body and the parasite lives on the host.

8 0

3 years ago