Practice Exam 1

In which structure(s) below do all of the atoms have reasonable numbers of chemical bonds? A) structure a B) structure b C) structure c D) structure d E) all of them

D) structure d

Cellulose is:

E

Carbon atoms tend to form ______ bonds.

A

In an alpha helix, a hydrogen atom

A

This contains the vast majority of the cell's DNA

A

A mole of water weighs 18 grams while a mole of sucrose weighs 342 grams. Which statement is true?

B

__________ are components of phospholipids

B

Compared to a ^40K, the isotope ^30 K has A) A different atomic number B) One less neutron C)One less proton D) One less electron E) One less proton and one less electron

B) One less neutron

Which of the sequences below goes from the largest to the smallest?

C

Which statement(s) about ALL living things is/are true? A) All living things are capable of sight B) All living things have a nervous systems of some sort C)All living things are capable of reproduction D) All the above statements are true E) None of the above statements are true

C) All living things are capable of reproduction

Sulfur has 6 electrons in its outer electron shell. It combines covalently with hydrogen to form a stable (and smelly) compound. What is the structure of this compound?

C) H

In biological molecules, nitrogen atoms normally form __________ bonds.

D

This organelle is involved in energy generation

D

Which component is present in prokaryotic cells?

D

Which is an example of a lipid?

D

Which type of linkage connect amino acids to protein?

D

Why is water cohesive?

D

You are trying to identify an organism by looking at a group of its cells under the microscope. It is multicellular and the cells clearly have a cell wall. The cells have many internal organisms but no chloroplasts. To which kingdom does this organism belong?

D

Which functional group is present on this molecule A) Carboxyl group B) Sulfhydryl group C) Hydroxyl group D) Amino group E) Phosphate group

D) Amino group

Acid rain sometimes has a pH of 5. What is the H+ concentration?

E

This organelle contains proteins

E

This organelle is found in plant cells

E

Which of the following is an example of a carbohydrate?

E