Science 10 - Fourth Quarter Exam (Part 1)

It is a distinct portion of the DNA responsible for an inherited trait.

• chromosome

• gene

• codon

• nucleus

What are the four nitrogenous bases of DNA?

• adenine, guanine, uracil, thymine

• adenine, thymine, cytosine, uracil

• adenine, uracil, cytosine, guanine

• adenine, thymine, cytosine, guanine

Which of the following processes is needed to ensure that all body cells carry the same genetic materials and that instructions are copied exactly for the next generation?

• replication

• transcription

• translation

• mutation

Which of the following statement is incorrect about the key features of the DNA model?

• The DNA has four nitrogenous bases.

• The DNA has a shape of a double helix.

• The DNA has a sugar-phosphate backbone.

• The DNA contains adenine, uracil, guanine, and cytosine.

What is the function of RNA?

• They join the amino acids to form proteins.

• They assist in carrying out DNA’s blueprint guidelines.

• They break the hydrogen bonds between the nucleotides.

• They continue to add new nitrogenous bases and do the proofreading.

What will be the complementary strand of TTA TCG?

• AAT AGC

• UUT UGC

• AAU ACG

• ATA AGG

A codon is a triplet code with particular sequence of nucleotides found on the ___________.

• DNA

• protein

• tRNA

• mRNA

DNA: _________________ , RNA: _________________

• replication, translation

• transcription, replication

• replication, transcription

• translation, replication

• purine, pyrimidine

• pyrimidine, purine

• phosphate, sugar

• sugar, phosphate

It refers to a change in species over time.

• evolution

• extinction

• migration

• adaptation