biology test sem. 2

Question 1

We add Nucleotides to which end?

Answer 1

3’ end

Question 2

Which of these unwinds DNA ?

Answer 2

Helicase enzyme

Question 3

Which strand has Okazaki fragments?

Answer 3

Lagging strand

Question 4

What is the genotype for something that is heterozygous with the phenotype being green eyes . B= Brown, G=Green, b=Blue

Answer 4

Gb

Question 5

What is the Phenotypic ratio for the info provided, make sure to use a Di-Hybrid cross, aka large Punnett square. P1 has homozygous long hair (L) which is dominant to short hair (l) and heterozygous Tall (T) which is dominant to short. P2 is short with short hair.

Answer 5

Phenotypic ratio: 50% Long hair and short, 50% Longhair and tall

Question 6

What is the Genotypic ratio for the info provided, make sure to use a Di-Hybrid cross, aka large Punnett square. P1 has homozygous long hair (L) which is dominant to short hair (l) and heterozygous Tall (T) which is dominant to short. P2 is short with short hair.

Answer 6

Genotypic ratio: 50% LTlt and 50% Ltlt

Question 7

What is the complimentary RNA strand

3’ TACCTAAGACCG 5’

Answer 7

5’ AUGGAUUCUGGC 3’

Question 8

What is the 3rd base in the gene? ATCCAGCGGATT

Answer 8

C

Question 9

What is the phenotypic ratio for the following scenario? For the scenario Brown (B) is Dominant to Black (b) and Tall (T) is Dominant to short (t). Parent 1 is Heterozygous for Brown hair and Heterozygous Tall. Parent 2 Has black hair and is short

Answer 9

4/16 Brown Tall 4/16 Brown short 4/16 Black Tall 4/16 Black short

Question 10

What is the amino acid for this DNA sequence? ATG

Answer 10

TYR

Question 11

What is this a picture of?

Answer 11

Eukaryotic DNA

Question 12

what is the term for this definition: stabilize open helix because DNA is stable when double-stranded?

Answer 12

SSBP

Question 13

Connects the pieces of Okazaki fragments together

Answer 13

Ligase

Question 14

How many chromosomes are there in a human cell?

Answer 14

46

Question 15

Which of these is the letter used in DNA but not RNA?

Answer 15

T

Question 16

What is the complimentary RNA strand
3’ TACCTAAGACCG 5’

Answer 16

5’ AUGGAUUCUGGC 3’

Question 17

Which of these is the correct order in the Genetic process?

Answer 17

DNA, RNA, AA

Question 18

What is the 2nd Codon? ATCCAGCGGATT

Answer 18

CAG

Question 19

Theo is watching the cowboys lose another playoff game while watching his body develops a mutation that changes his heart and makes it much better equipped with to deal with continual disappointment this dramatically increases his odds of survival, what kind of mutation is this?

Answer 19

Beneficial mutation

Question 20

What is the complimentary DNA strand
3’ TACCTAAGACCG 5’?

Answer 20

5’ ATGGATTCTGGC 3’

Question 21

What is the genotypic ratio for the following scenario? For the scenario Brown (B) is Dominant to Black (b) and Tall (T) is Dominant to short (t). Parent 1 is Heterozygous for Brown hair and Heterozygous Tall. Parent 2 Has black hair and is short.

Answer 21

4/16 BbTt 4/16 Bbtt 4/16 bbTt 4/16 bbtt

Question 22

When two dominant traits are both expressed this is called incomplete dominance. True or false?

Answer 22

false

Question 23

DNA: 3’A T A C G A A A T C G C G A T C G C G G C G A T T C G 5’

Answer 23

RNA: 3’ UAU GCU UUA GCG CUA GCG CCG CUA AGC 5’
AA:

Question 24

The pedigree shows the inheritance of colorblindness, a sex-linked trait.
Is the trait for colorblindness dominant or recessive?
How do you know?

Answer 24

Recessive
The majority of the people on the chart don’t have it