DNA RNA Base Practice

Why is RNA so important to cell differentiation?

• The cell makes specific proteins directly from RNA that determine the cell type and function.

• RNA binds to DNA to generate energy that is needed to make molecules that identify one cell from another.

• The cell sends RNA to the surface of the cell membrane where RNA acts as the receptor for identification and signaling.

• RNA performs transcription to create DNA that is then used to modify proteins that are specific to each type of cell.

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What would MOST LIKELY happen if the process in the nucleus is interrupted?

• DNA would not be decoded into an RNA molecule.

• DNA would not be able to be produced.

• Protein synthesis would be increased.

• Amino acids would bind together.

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Tyra made a mistake while she was creating her chart. Which best identifies the mistake Tyra made?

• DNA is single-stranded while RNA is double-stranded.

• DNA remains in the nucleus while RNA leaves the nucleus.

• DNA contains a ribose sugar while RNA contains a deoxyribose sugar.

• DNA has bases of A, G, C, and U while RNA has bases of A, G, C, and T.

Which nitrogenous base is most likely the characteristic feature of RNA?

• adenine

• cytosine

• thymine

• uracil

The complementary nitrogenous bases in DNA are held together by

• hydrogen bonds.

• nitrogen bonds.

• carbon bonds.

• oxygen bonds.

The term "genetic code" is defined as the sequence of bases in DNA in a cell's nucleus. The types of bases in the genetic code are

• different in bacteria and animals.

• the same in animals, plants, and bacteria.

• different in animals and plants.

• the same only in animals and bacteria.

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NGSS.HS-LS1-1

DNA is composed of two chains with nitrogenous bases that are complementary to one another. If a portion of a DNA strand reads ATCCGGAAT, then what would be the complement to this portion of DNA?

• TACGGCTTA

• ATCCGGAAT

• TAGGCCTTA

• ATGGCCAAT

The information specifying the traits of an organism is present in units of chemical substances in the center of a DNA molecule. The backbone that supports these chemical substances, allowing them not to collide, is composed of alternating

• amino acids and alcohols.

• fatty acids and minerals.

• sugars and phosphates.

• proteins and enzymes.

In 1951, British biophysicist Rosalind Franklin took X-ray diffraction images of DNA. Her images revealed how the nucleic acids interacted to form the chemical structure of DNA in which shape?

• a linear chain

• a single strand

• a double helix

• an irregular sphere

Which of these shows the correct order for the central dogma of molecular biology?

• DNA to protein to RNA

• RNA to DNA to protein

• protein to DNA to RNA

• DNA to RNA to protein