HW 5.2 Due by 11:59pm on 2/14

The diagram represents a process that occurs during normal human development. Which statement is correct regarding the cells and DNA?

• All the cells in an organism have identical DNA

• The DNA of the fertilized egg differs from the DNA of all the other cells.

• The DNA of the fertilized egg differs from some, but not all, of the other cells

• Only the fertilized egg contains DNA

The section labeled A in the diagram is most likely a

• protein composed of folded chains of amino acids

• biological catalyst (enzyme)

• a gene for a particular trait

• a chromosome undergoing a mutation

Which statement best describes a human chromosome?

• It is made of amino acid subunits that form genes

• It contains genes that may code for the production of enzymes or other proteins

• It is normally passed to the next generation through eating food

• It is only found in humans

The diagram below represents the banding pattern for human chromosome 11, with some of the bands labeled. What are the bands representing?

• proteins

• starch

• genes

• enzymes

A liver cell can make enzymes that a heart cell can not make because liver cells

• break down food into simple sugar

• contain more DNA and chromosomes than heart cells

• use different genes that the heart cells use, but have the same DNA

• remove carbon dioxide from the blood

The diagram below represents a portion of a DNA molecule. The letters represent different types of

• sugar molecules

• proteins

• amino acids

• nucleotides

If 10% of DNA is made up of thymine (T), what percentage of the sample is made up of adenine (A)?

• 10%

• 0%

• 40%

• 50%

The diagram below represents levels of organization within a cell of a multicellular organism. The level represented by X is composed of

• four base subunits (A, T, C, and G)

• RNA

• folded chains of glucose molecules

• 20 different amino acids

Which of the following does NOT cause genetic variation?

• sexual reproduction

• crossing over during meiosis

• random mutations

• asexual reproduction

Which of the following cells is considered haploid?

• gametes

• egg and sperm

• body cells

• both gametes and the sex cells (egg and sperm)