Human Biology Exam Quiz!

49 Questions | By Funkytrunks22 | Last updated: Mar 21, 2022 | Total Attempts: 155

Questions

Settings

Create your own Quiz

Questions and Answers

1.

In a cell undergoing cellular reproduction which of the following stages have no chromatids?
- A.
  
  Prophase
- B.
  
  Anaphase
- C.
  
  Metaphase
- D.
  
  Telophase
2.

Which portion of the meiotic cell division directly follows telophase and cytokinesis of the first cell division?
- A.
  
  Replication of DNA
- B.
  
  G2
- C.
  
  S Phase
- D.
  
  Prophase of the next division
3.

If a cell is to undergo mitosis which of the following is not true?
- A.
  
  Both members of a chromosome pair will be replicated.
- B.
  
  Both members of a chromosome pair will attach to the spindle.
- C.
  
  The mother cell will end up with four times the amount of DNA after Interphase has occurred.
- D.
  
  There is only one Interphase in each cell reproductive cycle.
4.

In cellular reproduction, if one sees the chromosomes of a cell aligned at the center of the cell in a straight line, this cell may:
- A.
  
  Be considered a diploid cell.
- B.
  
  Be in the G1 phase of cellular reproduction.
- C.
  
  Be in either the G1 and G2 phases of cellular reproduction.
- D.
  
  Have moved directly into anaphase from prophase.
5.

The purpose of anaphase is to:
- A.
  
  Eliminate one chromosome of each pair.
- B.
  
  Cause the cell to grow before cytokinesis.
- C.
  
  Allow separation of the chromatids of each chromosomes.
- D.
  
  Make more DNA before telophase.
6.

If one has the following sequence of bases, what will be the nucleotide base which one would predict to correctly replace the X? A A A G G G G C C C C T T T AT T T C C C C G G G G A A A X
- A.
  
  C, because there cannot be four A's in a row.
- B.
  
  It is not possible to predict what will occur at X.
- C.
  
  U, because RNA is being produced.
- D.
  
  T, because this is DNA.
7.

If one has the following sequence of DNA bases, what will be the sequence of RNA which is made from this sequence? A A G C G T T G A C A
- A.
  
  U U C G C A A C U G U
- B.
  
  U U C G C U U C U G U
- C.
  
  T T C G C U U C U G U
- D.
  
  U U G C G U U C U G U
8.

Which is true of the structure of DNA? [In the following, P = PHOSPHATE; S = THE CORRECT DNA 5 CARBON SUGAR]
- A.
  
  Bonds between the P's of the two backbones hold the two DNA strands together.
- B.
  
  Each sugar phosphate backbone (rails of the ladder) has the following structure: P - P - S - P - P - S - P - P - S - P - P - S - P - P
- C.
  
  A nitrogenous base (A, C, G, or T) is attached to the S of the backbones.
- D.
  
  Purines are found in only one strand of the DNA molecule because of the shape of purines.
9.

In a normal piece of DNA which has 20 complementary nitrogenous base pairs, the highest number of purine nucleotides which could be found in one of the strands is:
- A.
  
  6
- B.
  
  8
- C.
  
  10
- D.
  
  20
10.

In a molecule of DNA, one would find that:
- A.
  
  Every purine is shaped as a single ring.
- B.
  
  Every purine of one strand is hydrogen bonded to a pyrimidine of the other strand.
- C.
  
  The two strands are held together by three hydrogen bonds between each of the bases of a base pair.
- D.
  
  DNA is allowed to have purine-purine base pairs if they come next to a pyrimidine-pyrimidine base pair.
11.

If a parent cell (assume 1 pair of chromosomes) is to undergo normal mitosis, then each of the daughter cells will have:
- A.
  
  1 pair of chromosomes
- B.
  
  1 chromosome
- C.
  
  4 DNA molecules
- D.
  
  2 chromatids
12.

If a parent cell (assume 1 pair of chromosomes) is to undergo normal meiosis, then each of the final daughter cells will have:
- A.
  
  1 pair of chromosomes
- B.
  
  1 chromosome
- C.
  
  2 DNA molecules
- D.
  
  1 chromatid
13.

If a parent cell (assume 1 pair of chromosomes) is to undergo normal meiosis and produces an egg, then the final, functional, unfertilized egg will contain:
- A.
  
  1 pair of chromosomes
- B.
  
  1 chromosome with 2 chromatids
- C.
  
  1 chromosome
- D.
  
  A small polar body instead of chromosome(s)
14.

Which of the following is a characteristic of normal meiosis?
- A.
  
  Meiosis produces only gametes.
- B.
  
  Any body cell can undergo meiosis.
- C.
  
  DNA undergoes replication twice, once before the first division and once before the second division.
- D.
  
  After the first division, the two daughter cells are still diploid.
15.

A human male has both an X and a Y sex chromosome. Therefore sperm formed by a human male:
- A.
  
  Will contain both an X and a Y in the same sperm. Whichever chromosome is used from this type of sperm will determine the sex of the offspring.
- B.
  
  May contain either an X or a Y but not both.
- C.
  
  Contain only a Y because the sons will all get the Y.
- D.
  
  Will become a polar body if it contains an X.
16.

What is a codon?
- A.
  
  A codon is three nitrogenous bases in a row of a DNA molecule.
- B.
  
  A codon is three nitrogenous bases in a row at the end of a tRNA molecule.
- C.
  
  A codon is three amino acids in a row in a protein.
- D.
  
  A codon is three nitrogenous bases in a row of an RNA molecule.
17.

Which codon is called the START codon?
- A.
  
  The first nitrogenous base triplet AUG of an mRNA molecule.
- B.
  
  The nitrogenous bases ABC.
- C.
  
  The first exon in a mRNA molecule.
- D.
  
  The first nitrogenous base A of an mRNA molecule.
18.

What are introns?
- A.
  
  Exons are really tRNA before the anti-codon is added.
- B.
  
  Introns are the portions of RNA that are saved, or included, to form the final mRNA molecule.
- C.
  
  An Intron is also called a codon. The two are the same thing.
- D.
  
  Introns are the portion(s) of RNA that are removed, or excluded, from the final mRNA molecule.
19.

Which is the true statement?
- A.
  
  All codons code for an amino acid.
- B.
  
  The first three amino acids. when synthesizing a protein, are always Methionine-glycine-glycine.
- C.
  
  The first amino acid, when synthesizing a protein is always methionine.
- D.
  
  An amino acid will have only one codon which codes for it.
20.

If a human cell has 23 pair of chromosomes, one would say that it:
- A.
  
  Will undergo meiosis.
- B.
  
  Is a gamete in which non-disjunction of chromosome 23 has occurred.
- C.
  
  Is probably from a woman.
- D.
  
  Could be a fertilized egg.
21.

Which of the following crosses would result in a phenotypic ratio of 1 dominant and 1 recessive?
- A.
  
  AA x aa
- B.
  
  Aa x AA
- C.
  
  Aa x Aa
- D.
  
  Aa x Aa
22.

In the cross, AaBb x AaBb, which gamete would NOT be formed?
- A.
  
  AA
- B.
  
  Ab
- C.
  
  AB
- D.
  
  Ab
23.

Which of the following crosses could produce a child with the type AB blood as well as a child with type O blood?
- A.
  
  IAIB x ii
- B.
  
  IAIa x IbIb
- C.
  
  IAi x IBi
- D.
  
  IAIB x IAIB
24.

What proportion of homozygous genotypes could occur from the cross Aa x Aa?
- A.
  
  1/4
- B.
  
  2/4
- C.
  
  3/4
- D.
  
  9/16
25.

The following genes R and r show incomplete dominance. Which of the following crosses would show three phenotypes?
- A.
  
  RR x rr
- B.
  
  RR x Rr
- C.
  
  Rr x Rr
- D.
  
  RR x RR x rr