Gabrielle Gordon
Test por , creado hace más de 1 año

Here are the first ten questions from exam I, scrambled and a little reformatted(in some I switched the question and the answer, and I made a few checkboxes instead of just having one right answer).

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Gabrielle Gordon
Creado por Gabrielle Gordon hace alrededor de 7 años
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Exam I_1-10

Pregunta 1 de 10

1

Which of the following is the largest?

Selecciona una de las siguientes respuestas posibles:

  • a hydrogen ion

  • starch

  • a mitochondrion

  • a cell

Explicación

Pregunta 2 de 10

1

Compared to when a solution is basic, when a solution is acidic it has...

Selecciona una de las siguientes respuestas posibles:

  • the same pH

  • more free hydrogen ions

  • fewer total hydrogen ions, both in free and in large molecules

  • higher pH

Explicación

Pregunta 3 de 10

1

The membranes that surround cells are made of many ...

Selecciona una de las siguientes respuestas posibles:

  • triglycerides

  • nucleic acids

  • starches

  • micelles

  • phospholipids

Explicación

Pregunta 4 de 10

1

The polarity of water...

Selecciona una o más de las siguientes respuestas posibles:

  • means that protons are more often found by oxygen, not hydrogen

  • makes water magnetic

  • arises from the difference in electronegativity between oxygen and hydrogen

  • allows water to make covalent bonds

  • allows water to make hydrogen bonds

Explicación

Pregunta 5 de 10

1

The polysaccharide most likely to be a structural part of a plant is

Selecciona una de las siguientes respuestas posibles:

  • glycogen

  • cellulose

  • ATP

  • chitin

Explicación

Pregunta 6 de 10

1

The fatty acid tails of phospholipids are...

Selecciona una o más de las siguientes respuestas posibles:

  • hydrophilic

  • made of steroids

  • hydrophobic

  • facing inside the cell

  • made of glycerol

  • joined to the head by glycerol

  • facing outside the cell

Explicación

Pregunta 7 de 10

1

Insulin receptors are proteins in the membranes of cells. When insulin binds to the receptor it changes the shape of the receptor. The shape change activates a response in the cell. You are studying a new protein that no one has studied before. You find out your protein has the same shape as the insulin receptor. Based on this information, you would predict that your new protein has...

Selecciona una de las siguientes respuestas posibles:

  • a similar function to proteins with different shapes

  • no function-- the protein is denatured

  • a similar function to the known insulin receptors

  • a similar protein to the hydrophilic proteins inside the cells

Explicación

Pregunta 8 de 10

1

Pasteur studied germ hypothesis when the spontaneous generation hypothesis was still popular. He sterilized broth in a swan neck flask, and then waited to see if living organisms grew. With the swan neck intact, he observed that when he waited he saw...

Selecciona una o más de las siguientes respuestas posibles:

  • no bacterial growth

  • bacterial growth

  • data supporting the germ hypothesis

  • data contradicting the germ hypothesis

  • data supporting the spontaneous generation hypothesis

Explicación

Pregunta 9 de 10

1

Which type of bond holds two different water molecules to each other, or the two halves of a DNA double helix together?

Selecciona una de las siguientes respuestas posibles:

  • non-polar covalent bonds

  • ionic bonds

  • hydrogen bonds

  • double covalent bonds

  • polar covalent bonds

Explicación

Pregunta 10 de 10

1

Which two are made of monomers and held together with covalent bonds?

Selecciona una o más de las siguientes respuestas posibles:

  • nucleic acids

  • all acids

  • water

  • proteins

  • starches

Explicación

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