NSC Life Sciences RNA and Protein Synthesis: Various options are provided as

Question

Various options are provided as possible answers to the following questions. Choose the correct answer and write the letter (A–D) next to the question number (1.1.1–1.1.10) in the ANSWER BOOK, for example 1.1.1

1.1.1 During which phase of meiosis do homologous chromosome pairs separate? 
A	Metaphase I
B	Anaphase I
C	Telophase I
D	Telophase II

1.1.2 A codon is a sequence of three nucleotides on a molecule of … 
A	rRNA.
B	mRNA.
C	irRNA.
D	DNA.

1.1.3 Which of the following distinguishes prophase 1 of meiosis from prophase of mitosis? 
A	Homologous chromosomes pair up.
B	Sister chromatids break down.
C	Nondisjunction becomes visible.
D	The nuclear membrane forms.

1.1.4 Scientists recorded the body of a woolly mammoth from the permafrost. The DNA sequence of the woolly mammoth shows similarities to the DNA sequence of which organism is this? 
A	The woolly mammoth and African elephant
B	The woolly mammoth has no relation to the African elephant
C	The mammoth is an African elephant
D	The African elephant should be in the same species.

1.1.5 An extra finger in humans is rare, but is due to a dominant gene. When one parent is normal and the other parent has an extra finger but is homozygous for the trait, what is the chance that their children will be normal? 
A	0%
B	25%
C	50%
D	75%

1.1.6 Which ONE of the following correctly describes the ploidy and number of cells produced at the end of meiosis? 
A	Haploid	NUMBER OF CELLS
B	Diploid	Two
C	Diploid	Four
D	Diploid

1.1.7 Scientists visiting a group of four islands P, Q, R, and S found similar spiders on each island. They carried out investigations to see the spiders from the different islands belonged to the same species.
The results are in the table below (X indicates successful interbreeding; blank indicates unsuccessful interbreeding):

Spiders from
P	Q	R	S
P	X	X	X	X
Q	X	X	X	
R	X	X		
S	X

Which two populations belong to the same species? 
A	P and Q
B	R and S
C	Q and S
D	P and S

1.1.8 A gene in a bacterium codes for a protein that has 120 amino acids. How many mRNA nucleotides code for this protein? 
A	30
B	60
C	120
D	360

Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2017 - Paper 2

Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Life Sciences - Question 1 - 2017 - Paper 2

1.1.1 During which phase of meiosis do homologous chromosome pairs separate?

1.1.2 A codon is a sequence of three nucleotides on a molecule of ...

1.1.3 Which of the following distinguishes prophase 1 of meiosis from prophase of mitosis?

1.1.4 Scientists recorded the body of a woolly mammoth from the permafrost.

1.1.5 An extra finger in humans is rare, but is due to a dominant gene...

1.1.6 Which ONE of the following correctly describes the ploidy and number of cells produced at the end of meiosis?

1.1.7 Which two populations belong to the same species?

1.1.8 A gene in a bacterium codes for a protein that has 120 amino acids.

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