Question

1. Leaded gasoline, originally developed to decrease pollution, is now banned
because the lead(II) bromide, PbBr₂, emitted when it burns decomposes in the
atmosphere into two serious pollutants, lead and bromine. Determine the oxidation number for each atom in the equation.

• Pb and Br2 are 0; and PbBr2 are +2 and -1 respectively
• only the diatomic molecule has an oxidation number of zero
• all have an oxidation number of zero

.The only way a recessive phenotype can be expressed is if:

• you have a homozygous recessive genotype
• you have heterozygous recessive genotype
• you have a homozygous dominant genotype

GMO foods can be grown hanging upside down in a greenhouse because:

- their DNA has been altered

- air contains all of the nutrients needed for growth

- the weather is always perfect in a greenhouse

In the DNA molecule, guanine binds to _____according to Chargaff’s rules.

- uracil

- cysteine

- thymine

Answer 1

in Pd Br, e oxidation state Bn - +2 -] and in pdo Br2 - 0 * Bhi a recessive phenotype can be expressed is if a do homozygous or heterozygous.

for the dominant allel c) correct. * in DNA, there are 4 Nitrogen containing base a) Adenine () Cytosine 6) Guanine ) Thymine, here Adenine and Thymine binds via 2 H-bond and Guanine and cytosine finds via 3 H (According to Charg bond.