B.6A Components of DNA 🏖️

Albumin is a protein that is secreted by liver cells and transported to the blood stream. What factor most directly determines the amino acids that are created to make albumin?

• The temperature of the cell when translation is taking place

• The number of chromosomes in a cell

• The sequence of nucleotides in DNA

• The amount of energy that is available in the cell

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The base sequence of a segment of DNA is shown.

Which base sequence correctly completes DNA strand 2?

• A T A C G T

• G C G T A C

• C G C A T G

• T A T G C A

What components make up the backbone of a DNA molecule?

• Purines and deoxyribose

• Pyrimidines and purines

• Deoxyribose and phosphate groups

• Phosphate groups and pyrimidines

A model of DNA is Shown.

Which part of the DNA model is most directly associated with the coding of genetic information?

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A model of DNA is Shown.

Which part of the DNA model is most directly associated with the backbone support of the DNA molecule?

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A segment of DNA is shown in the diagram.

Which of these identifies the part of DNA segment labeled X?

• Nucleotide

• Phosphate group

• Hydrogen bond

• Deoxyribose

In Texas Longhorn cattle, coat coloration is an inherited trait. What is the genetic basis of coat-color variation in Texas Longhorn cattle?

• Differences in the nucleotide sequences of genes

• Differences in the numbers of chromosomes in cells

• Differences in the diets of individual cattle

• Differences in the environmental conditions of different geographic areas

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A Texas horned lizard (Phrynosoma cornutum) and a Texas bluebonnet (Lupinus texensis) are shown.

These two DNA sequences best provide evidence that--

• all organisms have identical genetic sequence

• the nucleotides making up the genetic code are common to all organisms

• the Texas horned lizard eats the Texas bluebonnet

• Mutations occur randomly in the genetic code

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Which statement best describes a similarity among trees, cats, and amoebas?

• They are prokaryotic organisms

• They are classified as members of the same kingdom

• They have genomes that consist of the same number of genes

• They contain DNA composed of the same four types of nucleotides

Which property is shared by the cells of all living things?

• The cells contain DNA composed of adenine, thymine, guanine, and cytosine.

• The cells are surrounded by a phospholipid bilayer and a cell wall made of cellulose.

• The cells have chromosomes that are located inside a membrane-bound nucleus.

• The cells rely on mitochondria to carry out aerobic cellular respiration.

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