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WorksheetsGenetics
Total questions: 25
Worksheet time: 11mins
The pentose sugar moieties are the primary structural difference between DNA and RNA. In addition which of the following is primarily associated with RNA molecule?
RNA consist of thymine instead of uracil
RNA molecules are highly branched structure
RNA molecules have higher structural complexities
RNA molecules are anti-parallel and double-stranded
Which of the following statements is true regarding the DNA code?
Each of the 64 types of codons in DNA and RNA code for a different amino acid
Not all codons specify amino acid components to be included in a protein.
DNA replication has a built-in mechanism that prevents or corrects all errors.
Which of the following statements are TRUE?
The mRNA is translated from 5’ to the 3’ end
The mRNA is translated from 3’ to 5’ end
During transcription, the mRNA is synthesized in the 3' to 5’ direction
During transcription, the DNA is translated into protein.
CAAT box is present in many
Prokaryotic promoters upstream of TATA box
Prokaryotic promoters are downstream of TATA box
Eukaryotic promoters are upstream of TATA box
Eukaryotic promoters are downstream of TATA box
Which of the followings are methods for termination of transcription in prokaryotes?
I. Release factor binding
II. Rho-mediated termination
III. Hairpin loop (stem loop) formation
I only
I, II, and III
II and III
III only
mRNA, tRNA, rRNA are all involved in bringing info out of the nucleus
True
False
The order of the amino acids in a polypeptide chain is determined by the order of nucleotides in the ribosome.
True
False
The enzyme that attached free nucleotides to make the complementary strand of mRNA from a DNA template is helicase.
True
False
A gene is a specific sequence of DNA nucleotides that codes for a particular protein
True
False
One codon codes for one amino acid
True
False
A DNA promoter that found in most eukaryotic cells is called an intron
True
False
The type of RNA that brings amino acids to the ribosome in the order that is coded by the mRNA is rRNA.
True
False
The properties of a protein are determined by the sequence of amino acids
True
False
In eukaryotic cell, translation occurs in the nucleus.
True
False
Which amino acid would be transferred to the position of codon CAC?
Leucine
Glycine
Valine
Histidine
Which of the following increases gene expression as much as 200-fold?
TATA box
Insulator
Enhancer
CAAT box
The "on/off" switch for an operon is called the
promoter
repressor
operator
gene
The process by which genotype becomes expressed as phenotype is
gene expression
gene removal
gene removal
gene splicing
Bacterial RNA polymerase binds to the
promoter
repressor
silencer
operator
Which of the following turns off transcription by binding to the operator?
RNA polymerase
repressors
promoters
enzyme
A small molecule that binds to the repressor and makes it inactive is
corepressor
inducer
promoter
operator
When a gene transcribes unless turned off by a repressor, it is considered _____ control
positive
negative
Basic tools of genetic regulation are the ability of some proteins to bind to specific
regulatory DNA sequences
regulatory RNA sequences
enzymes of cells
promoter portions of genes
In eukaryotes and bacteria, the most common form of regulation is
promoter control
translation control
repressor control
transcriptional control
The TATA box is a regulatory element that is part of the promoter of most prokaryotic genes.
True
False
