Gabrielle Gordon
Quiz por , criado more than 1 year ago

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
Criado por Gabrielle Gordon mais de 7 anos atrás
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Exam I_1-10

Questão 1 de 10

1

Which of the following is the largest?

Selecione uma das seguintes:

  • a hydrogen ion

  • starch

  • a mitochondrion

  • a cell

Explicação

Questão 2 de 10

1

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

Selecione uma das seguintes:

  • the same pH

  • more free hydrogen ions

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

  • higher pH

Explicação

Questão 3 de 10

1

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

Selecione uma das seguintes:

  • triglycerides

  • nucleic acids

  • starches

  • micelles

  • phospholipids

Explicação

Questão 4 de 10

1

The polarity of water...

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 5 de 10

1

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

Selecione uma das seguintes:

  • glycogen

  • cellulose

  • ATP

  • chitin

Explicação

Questão 6 de 10

1

The fatty acid tails of phospholipids are...

Selecione uma ou mais das seguintes:

  • hydrophilic

  • made of steroids

  • hydrophobic

  • facing inside the cell

  • made of glycerol

  • joined to the head by glycerol

  • facing outside the cell

Explicação

Questão 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...

Selecione uma das seguintes:

  • 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

Explicação

Questão 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...

Selecione uma ou mais das seguintes:

  • no bacterial growth

  • bacterial growth

  • data supporting the germ hypothesis

  • data contradicting the germ hypothesis

  • data supporting the spontaneous generation hypothesis

Explicação

Questão 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?

Selecione uma das seguintes:

  • non-polar covalent bonds

  • ionic bonds

  • hydrogen bonds

  • double covalent bonds

  • polar covalent bonds

Explicação

Questão 10 de 10

1

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

Selecione uma ou mais das seguintes:

  • nucleic acids

  • all acids

  • water

  • proteins

  • starches

Explicação

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