10 Practice Exam

The different forms of a gene are called

• Chromosomes

• DNA

• Hybrid

• Alleles

An allele whose trait always shows up in the organism when the allele is present is called a....

• Recessive allele

• Dominate allele

Having two identical alleles for a trait is called

• Homozygous

• Homogenous

• Heterozygous

• Sugar

An organism's physical appearance, or visible traits is referred to as it's

• Genotype

• Phenotype

• Birth Order

• DNA

The smallest building blocks of living things are amino acid molecules, the following is the correct order​ ​ (a)  

• Amino Acids->Proteins->Cells->Tissues->Organs->Organisms

• Amino Acids->Proteins->Tissues->Organs-&g
• Cells->Amino Acids->Proteins->Tissues->Organs->Organisms

• Amino Acid-proteins-cells-tissues-organs-organisms

Nucleotide molecules have three parts:

• Protein group + Deoxyribose sugar + One of four nitrogen-rich bases (A-T-G-C)

• Phosphate group + DNA + One of four nitrogen-rich bases (A-T-G-C)

• Phosphate group + Deoxyribose sugar + One of four nitrogen-rich bases (A-T-G-C)

• Protein + DNA + One of four nitrogen-rich bases (A-T-G-C)

Molecule that make up bases, (A) pairs with which base?

• A

• G

• T

• C

Identify the best definition of a base pair.

• The two twisted chains that form the backbone of the DNA molecule

• A double helix

• Two joined bases of the same type, e.g. A–A

• Two joined bases that are complementary, either A–T or G–C

Determine which of these are possible base pairs.

• G-C

• A-C

• P-C

• T-T

DNA is a...

• Organ

• Cell

• Molecule

• Nucleus