NBS Chemistry Nucleotides and Nucleic Acids Flashcards Preview

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Flashcards in NBS Chemistry Nucleotides and Nucleic Acids Deck (33):
1

Nucleotides have how many component?

3

2

What are the 3 components of nucleotides?

Phosphate
Sugar
Nitrogenous Base

3

Adenine and Guanine are examples of?

Purines

4

Uracil, Thymine, and Cytosine are examples of?

Pyramidines

5

Which of the following pyramidines is the nitrogenour base of a ribose?
A. Thymine
B. Uracil
C. Cytosine

Cytosine

6

Which of the following Purines is the nitrogenour base of a ribose?
A.Adenine
B. Guanine

Guanine

7

If a phosphate is removed from a nucleotide it is called a________?

Nucleoside

8

Double stranded alpha helix has two strands that run?
A. Parallel
B. Antiparallel
C. Horizontal
D. Transversely

Antiparallel

9

Nucelotides within one strand contain what type of bonds?
A. Hydrogen
B. Phosphodiester
C. Ester
D. Easily broken bonds

Phosphodiester

10

Nucelotides base pairs btwn complimentary strands have what type of bonds?
A. Hydrogen
B. Phosphodiester
C. Ester
D. Glycosidic

Hydrogen

*These are easily broken

11

Where does DNA replication take place?
A. cytoplasm
B. nucleolus
C. nucleus
D. ribosome

nucleus

12

Where does RNA replication take place?
A. cytoplasm
B. nucleolus
C. nucleus
D. ribosome

Nucleolus

13

Which enzyme is responsible for unwinding the DNA strand?
A. RNA polyermase
B. Topoisomerase
C. Thiamine Dehydrogenase
D. DNA polyermase

Topoisomerase

AKA helicase

14

During DNA replication; _____ polymerase acts as a template and makes new DNA from the parent DNA.

RNA

15

What splits the doubled 92 chromosome DNA into two identical 46 chromosome daughter DNA?
A. Topoisomerase
B. mRNA
C. Mitosis
D. DNA doubling

Mitosis

16

Transcription for RNA synthesis is from:
A. 5' to 3'
B. 3' to 5'
C. 5' to 5'

A
5' to 3'

17

Which enzyme is responsible for making an RNA primer from a DNA template during RNA transcription?
A. RNA polyermase
B. Topoisomerase

RNA Polymerase

18

The DNA template is read ____ bases at a time.
A. 1
B. 3
C. 2
D. 4

3

19

The DNA sequence is also called a:
A. Category
B. Strand
C. Code
D. Codon

Code

20

Which RNA is associated with holding the information to determine the amino acid sequence order?
A. tRNA
B. mRNA
C. rRNA

mRNA

21

Which RNA is the main component of the ribosomal unit which moves along mRNA?
A. tRNA
B. mRNA
C. rRNA

rRNA

22

This RNA jumps on and off, carrying amino acids with it?
A. tRNA
B. mRNA
C. rRNA

tRNA

23

Prior to translation (protein synthesis) which of the following would bind to a ribosome?
A. tRNA
B. Codon
C. Anticodon
D. mRNA

mRNA

24

This contains 3 bases (nucleotides) in the mRNA chain to code for one amino acid?
A. tRNA
B. Codon
C. Anticodon
D. rRNA

Codon

25

tRNA has 3 bases that is complementary to a specific codon; this describes which of the following?
A. mRNA
B. Codon
C. Anticodon
D. rRNA

Anticodon

26

When deal with RNA, what pyrimadine is substituted for thymine?

uracil

27

A-T, C-G for DNA, A-___ and C-G in RNA?

U- URACIL takes thymines spot with adenine pairing

28

Which anticodon binds with the mRNA codon and brings one amino acid to the ribosome?
A. rRNA
B. tRNA
C. mRNA

tRNA

29

What is the enzyme responsible for forming a peptide bond with an amino acid on the tRNA?
A. RNA polyermase
B. Topoisomerase
C. Peptidyl transferase
D. Aminoacyl-trna syntase

Peptidyl Transferase

30

An amino acid is attached to a tRNA by which enzyme?
A. RNA polyermase
B. Topoisomerase
C. Peptidyl transferase
D. Aminoacyl-trna syntase

Aminoacyl-trna synthase

31

T/F: AUG is an example of a stop condon

True

32

What is the enzyme associated with DNA formation properties?
A. RNA polyermase
B. Topoisomerase
C. Dnase
D. Aminoacyl-trna syntase

Dnase

33

What sugar is DNA?

Deoxyribose