BSCI-170 Unit 1 Review

Question 1

What particle can you remove from an atom without changing its charge, without changing its mass?

Accepted Answer

Neutron, electron

Question 2

A catalyzed reaction occurs more frequently in a solution of water and copper sulfate than in distilled water

Accepted Answer

The enzyme uses copper ions as cofactors for optimal enzyme activity.

Question 3

Why are plant oils such as olive oil liquid at room temperature?

Accepted Answer

They are unsaturated and have at least one double carbon bond.

Question 4

Match protein structure: 3D structure caused by interactions between amino acid R groups

Accepted Answer

Tertiary

Question 5

Which of these is NOT a difference between DNA and RNA?

Accepted Answer

Only DNA has phosphodiester bonds

Question 6

Ribosomes are not found in or associated with:

Accepted Answer

Golgi apparatus

Question 7

Define Chemical Energy

Accepted Answer

Potential energy in bonds

Question 8

The R groups of amino acids allow for amino acids to be organized into all the following groups except:

Accepted Answer

Positively charged and hydrophobic

Question 9

What is the function of Rough ER?

Accepted Answer

Protein synthesis

Question 10

Which of the statements is FALSE below?

Accepted Answer

All moleculare structures have the same amount of potential energy

Question 11

Which of these is the name of the reaction that links two monomers together?

Accepted Answer

Dehydration synthesis

Question 12

The R group in different amino acids are functionally the same and don't affect their chemical and physical properties.

Accepted Answer

False

Question 13

Which of these is a structural polysaccharide?

Accepted Answer

Cellullose

Question 14

Which of the following cannot be found in a prokaryotic cell

Accepted Answer

nuclear membrane

Question 15

TRUE/FALSE: Atoms are most stable when their valence shells are full.

Accepted Answer

True

Question 16

Define Free Energy

Accepted Answer

Energy in a system to do work

Question 17

An inhibitor that binds to the active site of an enzyme is termed a(n) ____ inhibitor

Accepted Answer

competitive

Question 18

What type of reaction breaks off a phosphate group from ATP, which releases energy?

Accepted Answer

Hydrolysis reaction

Question 19

If there is a concentration of [H+] in water of 10-4 , what would the pH be?

Accepted Answer

pH of 4, which is acidic

Question 20

Which of these is NOT a reason that functional groups are important?

Accepted Answer

They make hydrocarbons less reactive

Question 21

Phosphorus' electronegativity is 2.2 Potassium's is 0.8 and Nitrogen's is 3.0 Which bond is likely ionic?

Accepted Answer

Nitrogen - Potassium bond

Question 22

TRUE / FALSE: Every different polymer molecule is made up of completely different monomers.

Accepted Answer

False

Question 23

Match protein structure: Alpha helix shape caused by hydrogen bonds in the backbone of a polypeptide

Accepted Answer

Secondary

Question 24

Sulfur has an atomic number of 16, how many covalent bonds can it make?

Accepted Answer

2

Question 25

Which of these is NOT true about the interaction between Na+ and Cl-?

Accepted Answer

They form a molecule.

Question 26

Match the nitrogenous bases with their pair: Adenine

Accepted Answer

Thymine

Question 27

What is the function of the Golgi Apparatus?

Accepted Answer

Processing proteins for secretion

Question 28

Why is the coast of California much cooler than the interior?

Accepted Answer

Water has a high specific heat so the ocean stays cool relative to the land

Question 29

Liver tissue is responsible for detoxifying much of the blood in the body. Which organelle would you expect in the liver

Accepted Answer

Smooth Endoplasmic Reticulum

Question 30

What is the function of Lysosomes?

Accepted Answer

Storing digestive enzymes

Question 31

Which of the following can change the final 3D structure of a protein?

Accepted Answer

Temperature of the environment, A molecular chaperonin, The sequence of amino acids in a polypeptide, pH of the environment

Question 32

How many hydrogens can a single carbon be bonded to?

Accepted Answer

4

Question 33

TRUE/FALSE: Most organisms directly get energy in the form of ATP from the environment.

Accepted Answer

False

Question 34

TRUE/FALSE: Only eukaryotic cells acquire and use energy

Accepted Answer

False

Question 35

What is the name of the bond between individual monosaccharides in a polysaccharide?

Accepted Answer

Glycosidic Linkage

Question 36

An inhibitor that binds to a site distinct from the active site is termed a(n) ____ inhibitor

Accepted Answer

allosteric

Question 37

Which of the following statements is FALSE?

Accepted Answer

All electrons are the same

Question 38

Match the nitrogenous bases with their pair: Cytosine

Accepted Answer

Guanine

Question 39

True/False: Spontaneous processes always happen quickly with no energy input.

Accepted Answer

False

Question 40

Which of these describes a catabolic pathway?

Accepted Answer

Breaks down complex molecules and releases energy

Question 41

Of all elements, fluorine is the most electronegative. Based on this information, which statement below is accurate?

Accepted Answer

The F–F bond is nonpolar, whereas the F–H bond is polar.

Question 42

A peptide linkage forms between

Accepted Answer

an amino group and a carboxyl group.

Question 43

What is the function of the Chloroplast?

Accepted Answer

Starch production

Question 44

Which of these is NOT true about van der Waals interactions?

Accepted Answer

They are too weak to matter for biological systems.

Question 45

If you wanted to permanently block the function of an enzyme, you could

Accepted Answer

add a molecule that can covalently bind to the active site.

Question 46

What is the function of the Mitochondria

Accepted Answer

ATP Synthesis

Question 47

A structural isomer for the molecule NaOCH2CH3 would be expected to have how many carbon atoms?

Accepted Answer

2

Question 48

Define Entropy

Accepted Answer

Measure of disorder

Question 49

Define Thermal Energy

Accepted Answer

Kinetic energy in bonds

Question 50

Which of these is NOT true about water?

Accepted Answer

Hydrogen bonds are very strong bonds, nearly impossible to break in water

Question 51

If inhibitors bind using noncovalent bonds they are examples of ____ inhibition

Accepted Answer

reversible

Question 52

Lower energy = higher stability

Accepted Answer

True

Question 53

True/False: Small changes in pH do not matter to a cell, because H+ does not react with many molecules.

Accepted Answer

False

Question 54

Which statement accurately describes features of the active site of an enzyme?

Accepted Answer

Its shape is specific for the substrates.

Question 55

TRUE/ FALSE: The supernatent is denser than the pellet during centrifugation.

Accepted Answer

False

Question 56

Which interactions are not involved in the formation of a protein's tertiary structure?

Accepted Answer

Peptide bonds

Question 57

True/False: The alpha and beta isomers of glucose are too similar to have any effect on the function of these molecules.

Accepted Answer

False

Question 58

Which of these bond involve sharing electrons?

Accepted Answer

Covalent Bonds

Question 59

Which of these statements is TRUE about the relationship between structure and function in biology?

Accepted Answer

Structure and function are related at all scales of biology

Question 60

Which of these are functions of ATP?

Accepted Answer

All of the above

Question 61

Which of these is NOT a criteria of the cells of all living organisms

Accepted Answer

Having mitochondria

Question 62

TRUE/FALSE: Trace elements are not important to biology because they occur in such small amounts in life.

Accepted Answer

False

Question 63

What is the function of smooth ER?

Accepted Answer

Cholesterol synthesis

Question 64

Tertiary and quaternary structures share all the following properties except

Accepted Answer

subunit-subunit interactions

BSCI-170 Unit 1 Review

Questions 72

BSCI-170 Unit 1 Review

Questions 72