Please Help with this study guide!!! Question 1 _____ is an mRNA sequence that c

Question

Please Help with this study guide!!!

Question 1

_____ is an mRNA sequence that codes for the dipeptide Cys–Ser.

Question 2

A/An _____ mutation is the substitution of one nucleotide for another.

Question 3

Each individual tRNA contains a/an _____ of three nucleotides that is complementary to the codon in mRNA and identifies an individual amino acid.

Question 4

The sequence of three nucleotides (a triplet) that codes for a specific amino acid is called a/an _____.

Question 5

_____ is the most abundant type of RNA.

Question 6

The point at which unwinding occurs in DNA is called the _____.

Question 7

The double-stranded DNA helices wind around a core of protein molecules called _____ to form a chain of _____.

Question 8

If a single strand of a gene contains 726 bases,_____amino acids will make up the polypeptide prepared from it, assuming every base of the gene is transcribed and then translated.

Question 9

If 19% of the nucleotides in a sample of DNA contain the base adenine (A), then ____ % of the nucleotides in a sample of DNA contain the base thymine (T).

Question 10

A virus is an infectious agent consisting of a DNA molecule and an RNA molecule that is contained within a protein coating.

True

False

Question 11

For each DNA segment ACCTGCCTACCCG the sequence of the mRNA molecule synthesized is _____.

Question 12

TCTCAGAG is the sequence of a newly synthesized DNA segment when the template strand has the sequence _____.

Question 13

What is the amino acid sequence that is coded by mRNA sequence 5' AAG GCU AGU GGC 3'?

Question 14

What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'?

Explanation / Answer

Question 1- UGU-AGU

2-point mutation - changing one nucleotide for another.

3-codon- sequence of three nucleotides that together form a unit of genetic code

Thanks 4- codon

5-rRNA or ribosomal RNA because it is responsible for coding and protein synthesis (transcription and translations)

6-origin of replication- sites where replication starts which can unidirectional or bidirectional.

7-The double-stranded DNA helices wind around a core of protein molecules called Histone to form a chain of nucleosomes.

8-242 amino acids because each gene coded by codons which are triplets.

9-according Chargaff's rules DNA from should have a 1:1 ratio Base Pair i.e. 14% T Purine=pyimidin.

10-true

11-ACCTGCCTACCCG

TGGACGGATGGGC

12- AGAGTCTC

TCTCAGAG

13- 5'- Lys-Ala-ser-gly- 3'

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