FREE BIOLOGY AND STUDY GAMES ABOUT BIO 120 EXAM

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FREE BIOLOGY AND STUDY GAMES ABOUT BIO 120 EXAM

3 Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -202 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: During _____ both the contents of the nucleus and the cytoplasm are divided.

Answer:

the mitotic phase

Question 2: What is the directionality of a DNA template strand?

Answer:

3' to 5' Question 3: Which of the following results when homologous chromosomes cross over in meiosis?

Answer:

Corresponding segments of non-sister chromatids are exchanged

Question 4: Promoter

Answer:

a site in DNA where RNA polymerase must bind to initiate transcription; regulatory region of a protein-coding gene

Question 5: Why are molecules of tRNA not identical?

Answer:

each tRNA carries a specific amino acid on one end called a free amino acid Question 6: DNA does not store the information to synthesize which of the following?-Organelles -mRNA -Proteins -DNA

Answer:

Organelles

Question 7: Offspring acquire genes from their parents by inheriting...

Answer:

chromosomes

Question 8: What does crossing over create?

Answer:

recombinant chromosomes (combines DNA from both parents into one chromosome)

Question 9: Zygote

Answer:

a fertilized egg; diploid cell produced by the union of haploid gametes that will grow via mitosis Question 10: In any species the numbers of A and T bases and the numbers of C and G bases are...

Answer:

always equal

Question 11: Three binding sites for tRNA on a ribosome

Answer:

P site, A site, E site

Question 12: What is responsible for catalyzing the formation of an RNA primer?

Answer:

primase

Question 13: What enzyme catalyzes the attachment of an amino acid to tRNA?

Answer:

aminoacyl-tRNA synthetase

Question 14: DNA replication is semiconservative which means...

Answer:

each new double helix consists of one old and new strand

Question 15: Most cell division results in...

Answer:

genetically identical daughter cells

Question 16: Helicase

Answer:

untwists the double helix at the replication fork; breaks the hydrogen bonds

Question 17: Homologous Chrosomes

Answer:

pair of chromosomes that are not connected; similar in length, shape, and carry the same genes controlling the same inherited characteristics

Question 18: RNA processing converts the RNA transcript into...

Answer:

mRNA

Question 19: Number of divisions in meiosis

Answer:

2

Question 20: Building blocks of proteins

Answer:

amino acids

Question 21: Living organisms are distinguished by their ability to...

Answer:

reproduce their own kind

Question 22: Phases of the Cell Cycle

Answer:

Interphase and mitotic phase Question 23: Why is the new DNA strand complementary to the 3' to 5' strands assembled in short segments?

Answer:

DNA polymerase can assemble DNA only in the 5' to 3' direction

Question 24: Difference between plants and animals in cytokinesis

Answer:

animals- a cleavage furrow forms; plants- a cell plate forms Question 25: An old DNA strand is used as a ___ for the assembly of a new DNA strand

Answer:

template

Question 26: A site

Answer:

where the amino acid comes in; tRNA transfers in a free amino acid based on a codon in mRNA

Question 27: Phenotype

Answer:

physical appearance or function