Question:
According to complementary base pairing, a purine pairs with a ______.

Multiple Choices:
A. Sugar
B. Purine
C. Pyrimidine

Question:
Select all that apply — Which of the following statements are true regarding the DNA structure?

Multiple Choices:
A. The nitrogenous bases face the inside and hold the two backbones together with hydrogen bonds.
B. The basic three-dimensional structure of DNA is the double helix.
C. Each sidepiece is a sugar-phosphate backbone composed of phosphate groups alternating with the sugar deoxyribose.
D. Hydrogen bonds can form either between two purines or else between two pyrimidines.

Which two nitrogenous bases are classified as purines?

Multiple Choices:
A. Thymine
B. Cytosine
C. Guanine
D. Adenine

Fill in the blank — The basic unit of a nucleic acid is shown in this picture. It is called a ______ and it has three components: a phosphate group, a sugar (like deoxyribose), and a nitrogenous base (like adenine).

Question:
In which of the following subdisciplines of genetics are family relationships analyzed to predict patterns of inheritance within a family line?

Multiple Choices:
A. Mendelian genetics
B. Molecular genetics
C. Genomic medicine
D. Cytogenetics

A cell uses organelles called ______ to get rid of nonfunctional proteins.

Which organelle is shown in the picture?

• Rough ER

• Smooth ER

• Golgi complex

• Nucleolus

Answer: Golgi complex.

The organelle that contains the enzymes necessary to produce ATP for use by the cell is the ______.

The organelles that read coded genetic messages and assemble amino acids into proteins are called ______.

Answer: ribosomes.

Most of a cell’s proteins are broken down by which organelles?

• Centrioles

• Ribosomes

• Peroxisomes

• Proteasomes