Biology Practice Questions

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cl24uw06 said:
The production of ATP from the energy stored in NADH depends on:

A. hydrolysis
B. oxidation/reduction
C. chemotaxis
D. dephosphorylation
Click to expand...

Answer: B

NADH transfers its electrons to electron transport proteins in the process of oxidative phosphorylation. Recall that oxidative phosphorylation involves the production of ATP using energy from the redox reaction of the electron transport chain. The electron transport proteins have increasing electron affinities, and the phosphorylation of ADP to ATP is assoicated with electron transfers between proteins.
 
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cl24uw06 said:
Skin infections are most commonly caused by spherically shaped bacteria found in clusters. The most likely name for these bacteris is:

A. rods
B. spirilla
C. streptococci
D. staphylococci
Click to expand...

Answer: D

Staphylococci are spherical bacteria found in clusters. Streptococci are spherical bacteria found in chains or pairs. Rods are rod-shaped bacteria, whereas spirilla are spiral-shaped bacteria
 
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dat_student said:
Are all these questions from the "High Yield Biology" book???????
Click to expand...

I sent you a private message, but yes these questions are all from High Yield Biology including the great explanations. I highly recommend this book. It is only 200 pages; however, it contains far more detail then Kaplan or Barrons.
 
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I would really appreciate some feedback on this thread. Is it helpful or not. Personally I think it could be a great asset to have a thread with hundreds of DAT science questions such as these. If everyone posted one or two we would all benefit greatly.
 
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cl24uw06 said:
I would really appreciate some feedback on this thread. Is it helpful or not. Personally I think it could be a great asset to have a thread with hundreds of DAT science questions such as these. If everyone posted one or two we would all benefit greatly.
Click to expand...

I second you on this book. I recently bought this book and was surprised to find the amount of information it has in just 200 pages. I would highly advice any body who wants to read this book to use this as a review book. This definitely is NOT a first time read. The amount of information is overwhelming but well written. This book works well with Bio Exam Cracker.
But I do hope the questions on DAT are not as difficult as in this book. Most of the questions I consider in this book are above average to high in difficulty(Not really difficult but more of the detail information required to answer the question which is completely missing in Kaplan). Although I haven't taken DAT yet, but I think if you can answer these questions, then you can consider yourself ready for DAT. Any thoughts cl24uw06 ??
 
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cl24uw06 said:
I would really appreciate some feedback on this thread. Is it helpful or not. Personally I think it could be a great asset to have a thread with hundreds of DAT science questions such as these. If everyone posted one or two we would all benefit greatly.
Click to expand...

This thread is an excellent idea. 👍 👍
 
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sailinx said:
I second you on this book. I recently bought this book and was surprised to find the amount of information it has in just 200 pages. I would highly advice any body who wants to read this book to use this as a review book. This definitely is NOT a first time read. The amount of information is overwhelming but well written. This book works well with Bio Exam Cracker.
But I do hope the questions on DAT are not as difficult as in this book. Most of the questions I consider in this book are above average to high in difficulty(Not really difficult but more of the detail information required to answer the question which is completely missing in Kaplan). Although I haven't taken DAT yet, but I think if you can answer these questions, then you can consider yourself ready for DAT. Any thoughts cl24uw06 ??
Click to expand...

I just bought this book as well and already have Examkrackers. They are the best for reviewing bio.

I agree with you these questions are difficult and questions on Examkrackers are even more difficult... But they will really prepare you on the topic...

This is a great thrad cl24uw06! Thanks.
 
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Refer to a sequence of DNA found on one strand of a double-stranded DNA molecule. This DNA sequence is:

3'AAGGCTAGC5'

What is the complementary DNA strand sequence?
A. 5'AAGGCTAGC3'
B. 5'TTCCGATCG3'
C. 5'TTCCGATCG3'
D. 5'UUCCGAUCG3'

What is the primary mRNA transcript made from the complementary strand identified in the previous question?
A. 5' CGATCGGAA3'
B. 5' CGAUCGGAA3'
C. 5' UUCCGAUCG3'
D. 5' GCUAGCCUU3'

What is the tRNA anticodon sequence coded for by the original DNA sequence?

A. AAG GCT AGC
B. TTC CGA TCG
C. AAG GCU AGC
D. UUC CGA UCG
 
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cl24uw06 said:
Which process does NOT occur in intracellular organelles?

A. Oxidative phosphorylation
B. Transcription
C. Electron transport
D. Glycolysis
Click to expand...

Answer: D
 
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Which statement about both eukaryotes and prokaryotes is false?

A. Both have double-stranded DNA
B. Both have single-stranded RNA
C. Both use free ribosomes as sites of protein synthesis
D. Both replicate their chromosomal DNA from one unique origin
 
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Hey can you get me the ISBN number of that High Yeild Biology Book? Thanks!
 
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Which general statement(s) about genetic material is (are) true?

I. It can be double-stranded DNA
II. It can be single-stranded RNA
III. It can be single-stranded DNA
IV. It can be double-stranded RNA

A. I and II
B. I, II, and III
C. II and IV
D. I, II, III, and IV
 
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Which process is NOT shared by eukaryotes and prokaryotes?

A. DNA synthesis precedes spindle formation during division
B. Each daughter cell receives half of the maternal DNA
C. Glycolysis provides ATP for cell use
D. Oxidative phosporylation may provide ATP for cell use
 
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cl24uw06 said:
Which process is NOT shared by eukaryotes and prokaryotes?

A. DNA synthesis precedes spindle formation during division
B. Each daughter cell receives half of the maternal DNA
C. Glycolysis provides ATP for cell use
D. Oxidative phosporylation may provide ATP for cell use
Click to expand...

D is the correct answer, or is in A? I remember learning that prokaryotes undergo binary fission, is that right? And does that involve a spindle formation at all?

Would appreciate more clarrification on this one! Thanks!

by the way - great idea cl24uw06
 
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cl24uw06 said:
Which structure is NOT important in the synthesis of a novel protein to be inserted into the cell plasma membrane?

A. Golgi apparatus
B. Free ribosomes
C. tRNA
D. Endoplasmic reticulum
Click to expand...

B is the correct answer

Because free ribosomes are responsible for the manufacture of proteins that will reside in the cytoplasm (such as glycolytic enzymes, microfilaments, etc.) Wheras those exported to the plasma membrane are made on the Rough ER (where these ribosomes are attached at the begining site of the membrane transport system) protiens manufatured here are shuttled into the RE membrane, which are then shuttled to the golgi apparuts, which fuses with the membrane. If the protein is fused in the golgi membrane - it will be a membrane protien (such as an ion channal proton pumps that bacteria use to generate atp), if protiens are manufatured INSIDE the golgi, they will be released as chemical messengers (insulin)

NO FURTHER QUESTIONS

I REST MY CASE

CAN I HAVE YOUR NEXT WITNESS PLEASE

:laugh: :laugh: :laugh:

i love these kinds of topics!
 
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cl24uw06 said:
Try again, oxidative phosphorylation occurs in both prokaryotes and eukaryotes. The process takes place at a biological membrane. In prokaryotes this is the plasma membrane, and in eukaryotes it is the inner of the two mitochondrial membranes.
Click to expand...

A is the correct answer! Something to do with the fact that in prokaryotes - THERE IS NO SPINDLE FORMATION AT ALL!!! It's called binary fission!!!
 
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cl24uw06 said:
Which process does NOT occur in intracellular organelles?

A. Oxidative phosphorylation
B. Transcription
C. Electron transport
D. Glycolysis
Click to expand...

Answer: D

Glycolysis occurs in the cytoplasm of the cell. Oxidative phosphorylation, the Krebs cycle, and electron transport occur in the mitochondrion. Transcription occurs in the nucleus
 
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cl24uw06 said:
In the absence of molecular oxygen, which process does NOT continue?

A. Glycolysis
B. Conversion of pyruvate to lactate
C. ATP production
D. Electron transport
Click to expand...

Answer: D

If the final step of electron transport ceases (the transfer of electrons to moleular oxygen forming H2O), electron transport stops. Glycolysis, conversion of pyruvate to lactate, and some reactions producing ATP are independent of the presence of molecular oxygen.
 
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cl24uw06 said:
Refer to a sequence of DNA found on one strand of a double-stranded DNA molecule. This DNA sequence is:

3'AAGGCTAGC5'

What is the complementary DNA strand sequence?
A. 5'AAGGCTAGC3'
B. 5'TTCCGATCG3'
C. 5'TTCCGATCG3'
D. 5'UUCCGAUCG3'

What is the primary mRNA transcript made from the complementary strand identified in the previous question?
A. 5' CGATCGGAA3'
B. 5' CGAUCGGAA3'
C. 5' UUCCGAUCG3'
D. 5' GCUAGCCUU3'

What is the tRNA anticodon sequence coded for by the original DNA sequence?

A. AAG GCT AGC
B. TTC CGA TCG
C. AAG GCU AGC
D. UUC CGA UCG
Click to expand...

Answer: C, B, C

The key to understanding these related questions is knowing the base pairing rules. For DNA, G bonds to C, whereas A bonds to T. For RNA, G bonds to C, and A bonds to U. Also note that mRNA is complementary to DNA, and tRNA is complementary to mRNA. Therefore, for this set of questions:
Original DNA 3'AAGGCTAGC5'
Complementary DNA 5' TTCCGATCG3'
mRNA 3' AAGGCUAGC5'

Original DNA 3'AAGGCTAGC5'
mRNA 5' UUCCGAUCG3'
tRNA AAG GCU AGC
 
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cl24uw06 said:
Which statement about both eukaryotes and prokaryotes is false?

A. Both have double-stranded DNA
B. Both have single-stranded RNA
C. Both use free ribosomes as sites of protein synthesis
D. Both replicate their chromosomal DNA from one unique origin
Click to expand...

Answer: D

Eukaryots may replicate chromosomal DNA from several origins simultaneously. Choices A-C are true statements
 
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cl24uw06, you have been very generous with your time and effort for the benefit of others, what is your motivation/intention (I know you don't have any bad intentions - of course), but have you taken the DAT, and want to help others?

You've asked for feedback about this forum, and havn't recieved much input, so i want to tell you that it is a brilliant idea, if more people could get involved.

almost 450 people have visited this forum, and if each person contributed just two questions, then that's almost 1000 practice biology questions!

I for one will do my part to help this forum, and hopefully other would too, so that it continues all the way until August, when the last of us will finally be taking our DAT!
 
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cl24uw06 said:
Which general statement(s) about genetic material is (are) true?

I. It can be double-stranded DNA
II. It can be single-stranded RNA
III. It can be single-stranded DNA
IV. It can be double-stranded RNA

A. I and II
B. I, II, and III
C. II and IV
D. I, II, III, and IV
Click to expand...

Answer: D

Although eukaryotes and bacteria have double-stranded DNA, viruses have other forms of genetic material. Viruses may have either DNA or RNA as their genetic material. Furthermore, viral DNA or RNA may be either single-stranded or double-stranded, and either linear or circular.
 
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Which statement best describes the function of the rough endoplasmic reticulum?

A. Specific transport and signaling systems
B. Synthesis and assembly of membrane and secreted proteins
C. Production of energy during photosynthesis
D. Processing of membrane and secreted proteins, including glycosylation
 
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Which statement best describes the function of the Golgi apparatus?

A. Specific transport and signaling systems
B. Synthesis and assembly of membrane and secreted proteins
C. Production of energy during photosynthesis
D. Processing of membrane and secreted proteins, including glycosylation
 
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The following organelle is found in prokaryotic cells but not eukaryotic cells of animal origin.

A. mitochondria
B. chloroplasts
C. nucleus
D. cell wall
 
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Mitochondria and chloroplasts both:

A. function to provide the cell a source of energy.
B. are present in plants.
C. contain DNA.
D. all of the above
 
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Oprah said:
cl24uw06, you have been very generous with your time and effort for the benefit of others, what is your motivation/intention (I know you don't have any bad intentions - of course), but have you taken the DAT, and want to help others?

You've asked for feedback about this forum, and havn't recieved much input, so i want to tell you that it is a brilliant idea, if more people could get involved.

almost 450 people have visited this forum, and if each person contributed just two questions, then that's almost 1000 practice biology questions!

I for one will do my part to help this forum, and hopefully other would too, so that it continues all the way until August, when the last of us will finally be taking our DAT!
Click to expand...

I just feel like this is/will be a great tool for studying if everyone gets involved. I really do feel if I put in the effort to help others it will eventually come back around. Plus, if I take the time to type out questions and answers I will never forget them.
 
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well i guess it worked! you've got me typing out questions from old bio text books and old bio 1 and bio 2 exams! i hope other people also join in!
 
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cl24uw06 said:
Which structure is NOT important in the synthesis of a novel protein to be inserted into the cell plasma membrane?

A. Golgi apparatus
B. Free ribosomes
C. tRNA
D. Endoplasmic reticulum
Click to expand...

Answer: B

The rough endoplasmic reticulum (containing ribosomes) and the Golgi apparatus are generally required for the production of plasma membrane proteins. Recall that these proteins are often glycoproteins, and are glycosylated in the Golgi apparatus. Transcription of mRNA accurs in the nucleus, and translation of proteins requires tRNA. Free ribosomes are not required to synthesize cell membrane proteins because the ribosomes involved in the translation of these proteins are embedded in the endoplasmic reticulum.
 
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1) All of the following hormones are involved in the menstrual cycle EXCEPT:

estrogen
LH
prolactin
progesterone
FSH
 
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DNA contains all the following molecules EXCEPT:

uracil
guanine
adenine
deoxyribose
phosphate
 
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In aerobic respiration, the final electron acceptor in the electron transport chain is:

NAD+
O2
H2O
NADP+
H2
 
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Oprah said:
1) All of the following hormones are involved in the menstrual cycle EXCEPT:

estrogen
LH
prolactin
progesterone
FSH
Click to expand...

prolactin
 
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All of the following statements are correct regarding alleles EXCEPT:

A gene can have more than one allele.
Two identical alleles are said to be heterozygous with respect to that gene.
Alleles are found on corresponding loci of homologous chromosomes.
Alleles are alternative forms of the same gene.
One allele can be dominant and the other can be recessive.
 
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The part of the brain that controls involuntary actions is known as the

thalamus
cerebrum
medulla
cerebellum
hypothalamus
 
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cl24uw06 said:
Which process is NOT shared by eukaryotes and prokaryotes?

A. DNA synthesis precedes spindle formation during division
B. Each daughter cell receives half of the maternal DNA
C. Glycolysis provides ATP for cell use
D. Oxidative phosporylation may provide ATP for cell use
Click to expand...

Answer: A

There is no spindle formation in prokaryotes (bacteria) because bacteria do not use the process of mitosis to reproduce. Prokaryotes reproduce by binary fission
 
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A researcher performs a cross between 2 mice, both having black fur. Black for is dominant over white for. 75% of the offspring have black coats and 25% have white coats. The researcher can assume that the parents genotypes were most likely:

BB x BB
BB x Bb
BB x bb
Bb x Bb
bb x bb
 
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Crossing over occurs during which of the following phases in sexual reproduction?

Metaphase I
Metaphase II
Prophase I
Prophase II
Anaphase I
 
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A primary function of a plant root is to —

release carbon dioxide
absorb water and minerals
digest organic materials
produce secondary growth
 
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Which of these researchers would be most interested in maintaining a healthy deciduous forest?

Biochemist
Sonographer
Toxicologist
Ecologist
 
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cl24uw06 said:
Which is (are) NOT considered fungus (fungi)?

A. Yeast
B. Mold
C. Both yeast and mold
D. Neither yeast nor mold
Click to expand...

Answer: D

Both yeast and mold are fungi. The three major types of fungi are distinguished by their structure. Molds are multicellular filamentous organisms. Fleshy fungi are multicellular filamentous organisms that produce a thick (fleshy) reproductive body. These fungi include mushrooms. Yeast are nonfilamentous, unicellular organisms.
 
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True plants always contain each of these organs EXCEPT —

roots
stems
leaves
flowers
 
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Which two systems work with the skeletal system to cause a finger to move?

Immune and excretory
Digestive and respiratory
Nervous and muscular
Circulatory and integumentary
 
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A major difference between animals and plants is that

a. plants cannot move
b. animals are sexually reproductive
c. animal cells use osmotic pressure for nourishment
d. animals cells cannot use osmotic pressure for nourishment
 
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