BSC 108 Exam 1-ALABAMA 2025| COMPLETE EXAM
SET (questions and verified answers) FREQUENTLY
MOST TESTED QUESTIONS | already passed!!
Chromosomes that are not sex chromosomes are called . - ans -autosomes
Linked genes are genes that . - ans -are on the same chromosome
Flower color in snapdragons is an example of incomplete dominance. If a red-
flowered plant is crossed with a white-flowered plant, the F1 generation has pink
flowers. If a pink-flowered plant is crossed with a pink-flowered plant, the
progeny plants will be . - ans -25% red, 50% pink, and 25% white
Why is it that men are responsible for the gender of their children? - ans -unlike
women, who only contribute an X chromosome, men contribute either an X or a Y
chromosome
The sex chromosomes in humans that make an individual a male are . - ans -
X and Y
Which one of the following is a list of the four bases contained in DNA? - ans -
adenine, guanine, cytosine, thymine
In November of 2016, the World Health Organization declared that the Zika global
health emergency was over. What was the rationale for this declaration? - ans -
health officials now expect Zika to be a long-term problem rather than a short-
term emergency
A true-breeding plant that produces yellow seeds is crossed with a true-breeding
plant that produces green seeds. The seeds of all of the offspring are yellow.
Why? - ans -the yellow allele is dominant to the green allele
You cross a true-breeding red-flowered snapdragon with a true-breeding white-
flowered snapdragon. All of the F1 are pink. What can you say about the alleles
for the parental traits? - ans -red and white show incomplete dominance
Which one of the following choices is true of tRNA?
,A) tRNAs are extremely small molecules.
B) there are four types of tRNA
C) tRNAs carry special sequences known as codons
D) each tRNA binds a specific amino acid –
ans -D) each tRNA binds a specific amino acid
What is the ultimate source of all diversity? - ans -mutation
Most plant viruses have as their genetic material. - ans -RNA
Transcription is the . - ans -manufacture of a strand of RNA
complementary to a strand of DNA
Which of the following processes occurs in the cytoplasm of a eukaryotic cell?
A) transcription
B) DNA replication and translation
C) DNA replication
D) translation and transcription
E) translation - ans -E) translation
Early geneticists wondered how only four nucleotides could specify the sequence
of 20 amino acids in proteins. Today we know that there is a genetic code in
which __________ nucleotide(s) code(s) for each amino acid. - ans -3
The number of possible three-letter codes is 4^3, or 64. This is more than the
number of amino acids. Thus, the code can be redundant. In some cases, there is
more than one codon that codes for the same amino acid.
, Which of the following is an animal virus?
A) lambda virus
B) T4 virus
C) chicken pox virus
D) tobacco mosaic virus - ans -chicken pox virus
RNA contains the nitrogenous base instead of , which is only found
in DNA. - ans –uracil
Which of the following are the three phases of translation? - ans -initiation,
elongation, and termination
One strand of a DNA molecule has the base sequence ATAGGT. The
complementary base sequence on the other strand of DNA will be . - ans -
TATCCA
Which of the following statements about the Zika virus is not true?
A) The mosquito that carries the Zika virus bites both night and day.
B) Zika first emerged in human populations in 2016.
C) In addition to transmission by mosquito vectors, Zika can be transmitted from
mother to baby and from one sex partner to another.
D) It consists of a relatively simple structure of RNA and protein.
- ans -B) Zika first emerged in human populations in 2016.
A mutation that changed the third nucleotide in the DNA sequence specifying the
amino acid glycine from an A to a T would have what effect? - ans -it would have
no effect, because of redundancy in the genetic code, any amino acid-coding DNA
SET (questions and verified answers) FREQUENTLY
MOST TESTED QUESTIONS | already passed!!
Chromosomes that are not sex chromosomes are called . - ans -autosomes
Linked genes are genes that . - ans -are on the same chromosome
Flower color in snapdragons is an example of incomplete dominance. If a red-
flowered plant is crossed with a white-flowered plant, the F1 generation has pink
flowers. If a pink-flowered plant is crossed with a pink-flowered plant, the
progeny plants will be . - ans -25% red, 50% pink, and 25% white
Why is it that men are responsible for the gender of their children? - ans -unlike
women, who only contribute an X chromosome, men contribute either an X or a Y
chromosome
The sex chromosomes in humans that make an individual a male are . - ans -
X and Y
Which one of the following is a list of the four bases contained in DNA? - ans -
adenine, guanine, cytosine, thymine
In November of 2016, the World Health Organization declared that the Zika global
health emergency was over. What was the rationale for this declaration? - ans -
health officials now expect Zika to be a long-term problem rather than a short-
term emergency
A true-breeding plant that produces yellow seeds is crossed with a true-breeding
plant that produces green seeds. The seeds of all of the offspring are yellow.
Why? - ans -the yellow allele is dominant to the green allele
You cross a true-breeding red-flowered snapdragon with a true-breeding white-
flowered snapdragon. All of the F1 are pink. What can you say about the alleles
for the parental traits? - ans -red and white show incomplete dominance
Which one of the following choices is true of tRNA?
,A) tRNAs are extremely small molecules.
B) there are four types of tRNA
C) tRNAs carry special sequences known as codons
D) each tRNA binds a specific amino acid –
ans -D) each tRNA binds a specific amino acid
What is the ultimate source of all diversity? - ans -mutation
Most plant viruses have as their genetic material. - ans -RNA
Transcription is the . - ans -manufacture of a strand of RNA
complementary to a strand of DNA
Which of the following processes occurs in the cytoplasm of a eukaryotic cell?
A) transcription
B) DNA replication and translation
C) DNA replication
D) translation and transcription
E) translation - ans -E) translation
Early geneticists wondered how only four nucleotides could specify the sequence
of 20 amino acids in proteins. Today we know that there is a genetic code in
which __________ nucleotide(s) code(s) for each amino acid. - ans -3
The number of possible three-letter codes is 4^3, or 64. This is more than the
number of amino acids. Thus, the code can be redundant. In some cases, there is
more than one codon that codes for the same amino acid.
, Which of the following is an animal virus?
A) lambda virus
B) T4 virus
C) chicken pox virus
D) tobacco mosaic virus - ans -chicken pox virus
RNA contains the nitrogenous base instead of , which is only found
in DNA. - ans –uracil
Which of the following are the three phases of translation? - ans -initiation,
elongation, and termination
One strand of a DNA molecule has the base sequence ATAGGT. The
complementary base sequence on the other strand of DNA will be . - ans -
TATCCA
Which of the following statements about the Zika virus is not true?
A) The mosquito that carries the Zika virus bites both night and day.
B) Zika first emerged in human populations in 2016.
C) In addition to transmission by mosquito vectors, Zika can be transmitted from
mother to baby and from one sex partner to another.
D) It consists of a relatively simple structure of RNA and protein.
- ans -B) Zika first emerged in human populations in 2016.
A mutation that changed the third nucleotide in the DNA sequence specifying the
amino acid glycine from an A to a T would have what effect? - ans -it would have
no effect, because of redundancy in the genetic code, any amino acid-coding DNA
