Ib Biology Mid-Term Study Guide

Front 1

Which of the following Terms correctly describes the molecule below?

Back 1

Monosaccharide and Carbohydrate

Front 2

Which of the following substances are organic?

Back 2

I. Lipids

II. Water

III. Carbon Dioxide

I. ONLY

Front 3

What is a role of carbohydrates in animal cells

Back 3

as energy storage

Front 4

Which molecule is a monosaccharide

Back 4

Ribose

Front 5

Which of the following diagrams is the structure of ribose?

Back 5

Front 6

Which is the structure of glycerol?

Back 6

Front 7

What is the maximum number of fatty acids that can be condensed with glycerol?

Back 7

Three

Front 8

Which of the following reactions occurs when a dipeptide is formed from amino acids?

Back 8

Condensation

Front 9

Which diagram correctly illustrated a dipeptide?

Back 9

Front 10

Which structure represents an amino acid?

Back 10

Front 11

Which is not a primary function of protein molecules?

Back 11

Energy Storage

Front 12

What are the components of a DNA nucleotide?

Back 12

Deoxyribose, a phosphate, and one of the bases: adenine, cytosine, guanine, or uracil

Front 13

The diagram represents a DNA nucleotide. What could the part labelled X represnet?

Back 13

Guanine

Front 14

What causes water to have a relatively high boiling point?

Back 14

Hydrogen bonds between water molecules

Front 15

Which of the following features are correct for hydrogen bonding?

Back 15

I. It is involved in the cohesion of water

II. It results in the thermal properties of water

III. It is a bond within the water molecule

I. and II ONLY

Front 16

In the structure of DNA what binds with cytosine?

Back 16

Deoxyribose

Front 17

What is the composition of the backbone of DNA?

Back 17

Alternating sugar and phosphate molecules

Front 18

The drawing below shows a short section of a DNA molecule. What is labelled by I,II, and III?

Back 18

I. 5' end

II. purine

III. covalent bond

Front 19

What type of bonds holds the complementary base pairs together in a double helix of DNA?

Back 19

Hydrogen bonds

Front 20

What is a difference between the sense and antisense strands of DNA?

Back 20

The sense strand has the same base sequence as tRNA, but the antisense strands does not.

Front 21

To which parts of the deoxyribose molecule do phosphates bind in DNA?

Back 21

III and IV

Front 22

What is responsible for the conservation of the base sequence during DNA replication?

Back 22

Unpaired bases always attracting their complementary nucleotides

Front 23

What is the function of DNA polymerase I?

Back 23

To remove the RNA primers and replace them with DNA

Front 24

What is the function of helicase?

Back 24

It separates DNA strands

Front 25

During the process of replication, which bonds in the diagram of DNA below are broken?

Back 25

4,5

Front 26

The diagram below shows a short section of DNA molecule before and after replication. If the nucleotides used to replicate the DNA were radioactive, which strands in the replicated molecules would be radioactive?

Back 26

I, II, III, IV

Front 27

The diagram shows part of a molecule produced by replication of DNA. What is the significance of the shaded and then unshaded regions?

Back 27

One of the parts has been newly synthesized and the other was part of a pre-existing DNA molecule.

Front 28

Which events take place in DNA replication?

I. Formation of messenger DNA

II. Unwinding of DNA double helix

III. Formation of complementary strands by DNA polymerase

Back 28

II, III

Front 29

If mRNA has a codon CAU, what is the corresponding anticodon on the tRNA molecule?

Back 29

GUA

Front 30

In which direction is the replication fork moving and which bases would be needed to replicate the section of DNA shown?

Back 30

Left to right ; T,G,C

Front 31

Which are the correct directions of the following processes?

Back 31

all are 5' to 3'

Front 32

During the process of translation which of the following statements describes the relationship between nucleic acids?

Back 32

Anticodons on tRNA bind to complementary codons on mRNA

Front 33

How would the following DNA sequence, ACGTTGCATGGCA, be transcibed?

Back 33

UGCAACGUACCGU

Front 34

A certain gene codes for a polypeptide that is 120 amino acids long. Approximately how many nucleotides long is the mRNA that codes for this polypeptide likely to be?

Back 34

360

Front 35

Which stage of translation is illustrated by the diagram below?

Back 35

Translocation