Category 2 BIOLOGY

DNA is considered a universal genetic code. Which statements are true of the genetic code? Pick THREE correct sentences.

• The order of nucleotide sequences of the genetic code is the same for all living organisms.

• The components that make up the genetic code are common among all living organisms.

• Proteins are assembled from a four letter codon that specifies what amino acids are needed.

• The genetic code uses the four nucleotide bases: adenine, guanine, cytosine, and thymine.

• Amino acid sequences on the genetic code can be determined by the arrangement of the codons.

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Delray has dimples and his wife does not. Delray has a homozygous dominant genotype for dimples, and his wife has a homozygous recessive genotype for no dimples.

If Delray and his wife decide to have children, then which Punnett square correctly shows the probability of them having a child with dimples?

• 
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• 
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Sickle-cell anemia is caused by the homozygous recessive genotype. People with sickle-cell anemia have the genotype aa. People without sickle-cell anemia have either the genotype AA or Aa. A woman with the genotype AA has a child with a man with the genotype aa. What is the probability, as a percentage, that their child will have sickle cell anemia? _______________

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Which statement best explains the color and texture change of the leaves?

• Plants shrink when they do not get sunlight

• Plants can grow without sunlight.

• Environmental conditions do not alter a plant's characteristics.

• Environmental conditions influence the expression of genetic traits

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What are the nucleotides made of?

• Sugar, Phosphate, nitrogen base
• Phosphate, Adenine, nitrogen base
• Thymine, Adenine, Cytomine
• Phosphate, Nitrogen, Adenine

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Which 2 molecules forms the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

The two strands of nitrogenous bases in DNA are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

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NGSS.HS-LS1-1