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borishaifa [10]
2 years ago
15

Why does the moon appear to change shapes in the sky?

Biology
1 answer:
frozen [14]2 years ago
8 0

Answer:

D

Explanation:

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lana66690 [7]

Answer:

the answer is fda

Explanation:

hope this helps

5 0
2 years ago
Read 2 more answers
Why might knowledge of the gene and protein sequences of a species be useful in classifying that species? (4 points)
lara [203]

Answer:

It would make it possible to compare that species to other species at a level deeper than outward appearance

Explanation:

The proteins like hemoglobin and enzymes can be studied to see whether organism which are similar in form can also be related to each other. Its differences found in these proteins' amino acid sequences will present how closely or distantly related an organism is to another.

5 0
3 years ago
A researcher while working in vitro (outside cell) added helicase enzyme which resulted in the untwisting of the DNA helix. But
STALIN [3.7K]
Topoisomerase is the enzyme that can be added to correct the untwisting that is led to strain ahead of the replication fork. 
3 0
3 years ago
Read 2 more answers
A segment of a DNA molecule has the base sequence ATGAAC. Write a shorthand structure for this segment and for its complementary
Zanzabum

Answer: See attached picture.

Explanation:

DNA or deoxyribonucleic acid is the name for the molecule that contains the genetic information in all living things. This molecule consists of two strands that wind around each other to form a double helix structure.

The basic unit of nucleic acids are called nucleotides, which are organic molecules formed by the covalent bonding of a nucleoside (a pentose which is a type of sugar and a nitrogenous base) and a phosphate group. So each nucleotide is made up of a pentose sugar called deoxyribose, a nitrogenous base which can be adenine (A), thymine (T), cytosine (C) or guanine (G) and a phosphate group.

<u>What distinguishes one polynucleotide from another is the nitrogenous base</u>, and thus the sequence of DNA is specified by naming only the sequence of its bases. The sequential arrangement of these four bases along the chain is what encodes the genetic information, following the following criterion of complementarity: A-T and G-C. So the sequence of these bases along the chain is what encodes the instructions for forming proteins and RNA molecules. In living organisms, DNA occurs as a double strand of nucleotides, in which the two strands are linked together by connections called hydrogen bridges.

The chemical convention of naming the carbon atoms in the pentose nucleotide pentose numerically confers the names 5' end and 3' end ("five prime end" and "three prime end" respectively). The 5'-end designates the end of a DNA strand that coincides with the phosphate group of the fifth carbon of the respective terminal deoxyribose. A phosphate group attached to the 5'-end allows the ligation of two nucleotides; for example, the covalent bonding of the 5'-phosphate group to the 3'-hydroxyl group of another nucleotide, to form a phosphodiester bond.

3 0
2 years ago
What process do plants use to remove carbon dioxide from the air?
Oksi-84 [34.3K]
Photosynthesis for sure
6 0
3 years ago
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