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WorksheetsDNA,RNA, ATP
Total questions: 20
Worksheet time: 11mins
What is the main function of DNA in cells?
Storing genetic information
Providing energy
Transporting molecules
Breaking down nutrients
Which of the following is a structural component of DNA?
Ribose sugar
Thymine
Uracil
Adenosine triphosphate
What type of bond holds the two strands of DNA together?
Ionic bond
Hydrogen bond
Covalent bond
Peptide bond
The structure of DNA is a single helix.
TRUE
FALSE
Which sugar is present in RNA but not in DNA?
Glucose
Ribose
Deoxyribose
Fructose
Which nitrogenous base is found in RNA but not in DNA?
Thymine
Guanine
Cytosine
Uracil
RNA is double-stranded like tRNA
TRUE
FALSE
What is the primary function of RNA?
Providing energy for cellular processes
Acting as the genetic material in humans
Carrying genetic instructions to make proteins
Transporting nutrients across cell membranes
What does ATP stand for?
Adenosine Triphosphate
Adenine Trisaccharide
Adenine Triphosphate
Adenosine Trisaccharide
What is the primary role of ATP in cells?
Storing genetic information
Catalyzing chemical reactions
Serving as the main energy currency
Transporting molecules
Which part of the ATP molecule is directly involved in releasing energy?
Adenine group
Ribose sugar
Phosphate bonds
Hydrogen atoms
How many nucleotide bases make up a codon?
1
2
3
4
Which of the following is NOT a stop codon in the genetic code?
UAA
UGA
AUG
UAG
The genetic code is universal, meaning it is the same in almost all organisms.
TRUE
FALSE
What does a codon represent in the genetic code?
A single nucleotide
An amino acid
A sugar molecule
A phosphate group
Which of the following best describes the antiparallel nature of DNA?
Both strands run in the 5' to 3' direction.
The two strands are identical and run parallel to each other.
One strand runs 5' to 3', and the other runs 3' to 5'.
DNA strands twist in opposite directions in the helix.
Which of these RNA molecules is NOT involved in the genetic code directly?
mRNA
rRNA
tRNA
snRNA
In the genetic code, which of the following is true about codon degeneracy?
All codons code for unique amino acids.
Some amino acids are coded by multiple codons.
Codon degeneracy only applies to stop codons.
Each codon codes for more than one amino acid.
Why does ATP have high-energy phosphate bonds?
The bonds are covalent and unstable.
The negative charges on the phosphate groups repel each other.
The ribose sugar stores excess electrons.
The adenine base provides extra stability.
What would be the effect of a mutation that changes a stop codon (e.g., UGA) into a sense codon (e.g., UGG)?
The protein would be shorter than usual.
The protein would be unaffected.
The protein would continue to be synthesized, potentially leading to a longer protein.
The mutation would not affect the genetic code at all.
