Biology 2nd Semester Final Review

What is the role of gene expression in cells?

• Cells destroy DNA they don't use

• to be specialized, DNA codes proteins and their production

• all genes are expressed at all times

• during mitosis, only ones necessary are passed on

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If someone has diabetes (inability to properly regulate insulin), how could a bacterium inserted with a gene help?

• scientists can remote control the gene

• the bacterium itself is an actual treatment

• the offspring of the bacterium now produce insulin

• the person can eat food with bacterium in it

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Keratin can be found in hair follicle cells but not in heart cells. Why?

• hair cells contain different genes than heart cells

• hair cells don't produce DNA

• genes are expressed differently in different cells, based on what they do

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What happens when muscles contract?

• Calcium combines with ATP to make a sarcomere

• actin produces myosin and ATP

• myosin attaches to actin-binding sites

• calcium creates contractions

Which scenario would result in evolution or a trait being favored?

• green parrots can have either blue or green feathers

• a predator of butterflies sees and eats more yellow butterflies than green

• a large population keeps getting larger

• a single individual dies in a large population

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Which groups would have the most characteristics in common?

• amoebas and bread molds

• sac fungi and cnidarians

• choanoflagellates and cnidarians

• cnidarians and bilateral animals

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Cells control gene expression at transcription, translation and formation of protein.

• True

• False

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Choose parts of the immune system (may be more than one answer).

• lymph nodes

• spleen

• spinal cord

• white blood cells

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If a new species was discovered that was multicellular, contained chloroplasts and was made of eukayotic cells, which Domain should it be classified as?

• Eukarya

• Animalia

• Archaea

• Bacteria

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A developing human embryo produces a special type of hemoglobin that is not found in the blood of an infant, child, or adult.

Which statement best explains how this can be?

• Human genes slowly change as a person ages.

• Humans have genes for different types of hemoglobin, and they are turned on/off at different times.

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