Life at the Molecular and Cellular Level

Molecular and Cellular Biology Part 2

Cellular Energy

Cell Division

DNA & Protein Synthesis

Multiple Choice

Looking at the diagram above, which statement describes the relationship between photosynthesis and cellular respiration?

• The reactants of photosynthesis are the products of cellular respiration and vice versa.

• The reactants of photosynthesis are the reactants of cellular respiration.

• The products of photosynthesis and cellular respiration are the same.

• None of the above

Multiple Choice

The summary equation for photosynthesis is

• Carbon dioxide + water + light > glucose + oxygen

• Glucose + Oxygen > ATP + carbon dioxide + water

• Glucose > ATP + oxygen

• Carbon dioxide + glucose > oxygen + water

Multiple Choice

Which of the following phrases best describes cancer?

• absence of cyclins in the DNA

• uncontrolled cell growth caused by mutations in the p53 gene that control the cell cycle

• multiple gene mutations on a chromosome of DNA

• presence of genetic defects caused by hereditary disorders

Multiple Choice

The diagram above represents Anaphase I. Which of the following correctly describes Anaphase I during meiosis?

• The sister chromatids of each chromosome separate and move toward opposite poles

• The two homologs of each chromosome pair separate and move toward opposite poles, reducing the chromosome number by half

• A cleavage furrow appears, and by the end of this stage the parent cell has divided into two daughter cells

• Crossing-over occurs between the duplicated homologous chromosomes pair

Multiple Choice

The diagram above illustrates a phase of mitosis. What is the significance of the spindle fibers during anaphase?

• During anaphase, the spindle fibers split the cells in half, creating two daughter cells.

• During anaphase, the spindle fibers ensure that each daughter cell has half the number of chromosomes as the parent cell.

• During anaphase, the spindle fibers help maintain the chromosome number, ensuring that each daughter cell has the same number of chromosomes as the parent cell.

• During anaphase, the spindle fibers ensure that each daughter cell has twice as many chromosomes as the parent cell.

Multiple Choice

The diagram above shows a strand 3 of DNA matched to a strand of messenger RNA. What process does this diagram represent?

• transcription

• translation

• replication

• mitosis

Multiple Choice

The codon chart represents amino acids that are coded from different combinations of mRNA codons. Which amino acid sequence can be coded from the DNA sequence CAG TAG CGA?

• Val- Ile- Gly

• Val- Asp- Ala

• Val- Ile- Ala

• Val- Phe- Ala

Multiple Choice

How does DNA replication help to conserve genetic information?

• By making an RNA copy of a DNA molecule.

• By combining fragments of DNA into new combinations.

• By making an exact copy of a DNA molecule for the next generation.

• By encoding information that causes cells to grow and develop in certain ways.