Exam 2

Question 1

The central granule within a nuclear pore complex (NPC) is called

Answer 1

Transporter

Question 2

The inner nuclear membrane is supported by a

Answer 2

Nuclear Lamina

Question 3

Nucleoli are composed of which 3 substances?

Answer 3

DNA, RNA, and Proteins

Question 4

Which type of chromatin is usually under active transcription?

Answer 4

Euchromatin

Question 5

Histone proteins create bead-like structures of DNA called

Answer 5

Nucleosomes

Question 6

Which nuclear area is connected to the inside of rough endoplasmic reticulum

Answer 6

Perinuclear space

Question 7

Which human cells lack a nucleus?

Answer 7

Mature red blood cells

Question 8

Name of proteins that transport materials into the cell’s nucleus

Answer 8

Importins

Question 9

Where does an individual’s mitochondrial DNA come from? Haploid or diploid?

Answer 9

Mother, haploid

Question 10

3 functions of nucleoli

Answer 10

make rRNA, proteins, and daughter nucleoli

Question 11

4 parts of eukaryotic chromosomes

Answer 11

DNA strand, proteins, centromere, and telomeres

Question 12

What is a telomere

Answer 12

Repeating sequence at each end of chromosome

Question 13

Name two purines

Answer 13

Adenine and Guanine

Question 14

Name three pyrimidines

Answer 14

Cytosine, Thymine, and Uracil

Question 15

How do base pairs bond and how many H bonds

Answer 15

A to T or U with 2 H bonds, G to C with 3 H bonds

Question 16

Why is DNA held together with weak H bonds?

Answer 16

Need to be “unzipped” for transcription

Question 17

Name 3 parts of DNA and kind of pentose sugar

Answer 17

One phosphate group, one pentose sugar (deoxyribose), and nitrogenous base pairs

Question 18

Name 3 parts of RNA and kind of pentose sugar

Answer 18

One phosphate group, one pentose sugar (ribose), and nitrogenous base pairs

Question 19

What is name of single strand of RNA when loops together?

Answer 19

tRNA

Question 20

How does the structure of DNA nucleotides differ than RNA nucleotides?

Answer 20

the pentose sugar and Uracil instead of thymine

Question 21

How are the double helix strands held together?

Answer 21

H bonds

Question 22

How do the bases pair up in DNA

Answer 22

A-T and C-G

Question 23

How many H bonds between A and T

Answer 23

2

Question 24

How many H bonds between C and G

Answer 24

3

Question 25

What is the transfer of info from DNA to RNA called

Answer 25

Transcription

Question 26

Which type of RNA carries the genetic infer from the nucleus to the cytoplasm

Answer 26

mRNA

Question 27

Which type molecule will carry amino acids to the mRNA

Answer 27

tRNA

Question 28

Which part of the tRNA binds to the mRNA?

Answer 28

anticodon

Question 29

Since rRNA catalyzes joining amino acids rRNA is often called

Answer 29

Ribozyme

Question 30

3 functions of rRNA

Answer 30

component of ribosomal structure, Binds mRNA to ribosomes, Forms peptide bonds with adjacent amino acids