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B2 > NBS Chemistry Nucleotides and Nucleic Acids > Flashcards

NBS Chemistry Nucleotides and Nucleic Acids Flashcards

1
Q

Nucleotides have how many component?

A

3

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2
Q

What are the 3 components of nucleotides?

A

Phosphate
Sugar
Nitrogenous Base

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3
Q

Adenine and Guanine are examples of?

A

Purines

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4
Q

Uracil, Thymine, and Cytosine are examples of?

A

Pyramidines

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5
Q

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

A

Cytosine

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6
Q

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

A

Guanine

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7
Q

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

A

Nucleoside

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8
Q 
Double stranded alpha helix has two strands that run?
A. Parallel
B. Antiparallel
C. Horizontal
D. Transversely
A

Antiparallel

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9
Q 
Nucelotides within one strand contain what type of bonds?
A. Hydrogen
B. Phosphodiester
C. Ester
D. Easily broken bonds
A

Phosphodiester

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10
Q 
Nucelotides base pairs btwn complimentary strands have what type of bonds?
A. Hydrogen
B. Phosphodiester
C. Ester
D. Glycosidic
A

Hydrogen

*These are easily broken

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11
Q 
Where does DNA replication take place?
A. cytoplasm
B. nucleolus
C. nucleus
D. ribosome
A

nucleus

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12
Q 
Where does RNA replication take place?
A. cytoplasm
B. nucleolus
C. nucleus
D. ribosome
A

Nucleolus

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13
Q 
Which enzyme is responsible for unwinding the DNA strand?
A. RNA polyermase
B. Topoisomerase
C. Thiamine Dehydrogenase
D. DNA polyermase
A

Topoisomerase

AKA helicase

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14
Q

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

A

RNA

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15
Q 
What splits the doubled 92 chromosome DNA into two identical 46 chromosome daughter DNA?
A. Topoisomerase
B. mRNA
C. Mitosis
D. DNA doubling
A

Mitosis

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16
Q

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

A

A

5’ to 3’

17
Q

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

A

RNA Polymerase

18
Q 
The DNA template is read \_\_\_\_ bases at a time.
A. 1
B. 3
C. 2
D. 4
A

3

19
Q 
The DNA sequence is also called a:
A. Category
B. Strand
C. Code
D. Codon
A

Code

20
Q

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

A

mRNA

21
Q

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

A

rRNA

22
Q

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

A

tRNA

23
Q 
Prior to translation (protein synthesis) which of the following would bind to a ribosome?
A. tRNA
B. Codon
C. Anticodon
D. mRNA
A

mRNA

24
Q 
This contains 3 bases (nucleotides) in the mRNA chain to code for one amino acid?
A. tRNA
B. Codon
C. Anticodon
D. rRNA
A

Codon

25
Q 
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
A

Anticodon

26
Q

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

A

uracil

27
Q

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

A

U- URACIL takes thymines spot with adenine pairing

28
Q

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

A

tRNA

29
Q 
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
A

Peptidyl Transferase

30
Q 
An amino acid is attached to a tRNA by which enzyme?
A. RNA polyermase
B. Topoisomerase
C. Peptidyl transferase
D. Aminoacyl-trna syntase
A

Aminoacyl-trna synthase

31
Q

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

A

True

32
Q 
What is the enzyme associated with DNA formation properties?
A. RNA polyermase
B. Topoisomerase
C. Dnase
D. Aminoacyl-trna syntase
A

Dnase

33
Q

What sugar is DNA?

A

Deoxyribose

B2 (31 decks)

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