SAT Biology Sample Test

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SAT Biology Molecular (Biology-M) Sample Test

NOTE: Biochemistry is related to molecular Biology. Therefore for Biochemistry MCQs, prepare all of the following SAT Biology (Molecular) practice questions.

SAT Biology Molecular (Biology-M) Test Sample Questions Page-1. Following are the sample questions for SAT Biology Molecular (Biology-M). View answers to the questions at the bottom of the page.

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1. In human DNA, adenine (A) makes up approximately 30.9% of the bases, and guanine (G) makes up approximately 19.9% of the bases; therefore the percentage thymine (T) and cytosine (C) are
(A) 29.4% T and 19.8% C
(B) 29.8% T and 29.8% C
(C) 19.8% T and 19.8% C
(D) 19.8% T and 29.4% C
(E) 24.9% T and 18.2% C

2. If the chromosomes of a eukaryotic cell were lacking telomerase, the cell would
(A) have a greater potential to become cancerous than one with telomerase
(B) become increasingly shorter with each cycle of replication
(C) not produce okazaki fragments
(D) be unable to take up extraneous DNA from the surrounding solution
(E) produce okazaki fragments

3. Which of the following statements concerning transcription and translation in eukaryotic cells is NOT correct?
(A) Transcription results in the production of mRNA, whereas translation results in the production of polypeptides
(B) Transcription occurs in the nucleus, whereas translation occurs in the cytoplasm
(C) Transcription uses DNA as a template, whereas translation uses mRNA as a template
(D) Transcription results in the production of polypeptides, whereas translation results in the production of mRNA
(E) both (B) and (D)

4. The open, less compacted form of DNA that is available for transcription is known as the
(A) chromatin
(B) heterochromatin
(C) promotor
(D) operator
(E) euchromatin

5. A sequence on a DNA molecule that recognizes specific transcription factors that can stimulate transcription of nearby genes is known as the
(A) promotor
(B) operator
(C) enhancer
(D) euchromatin
(E) none of these

6. During the stage in which insertion of eukaryotic DNA into the plasmid vector occurs, the sticky ends formed by digestion of both DNA types with the same restriction enzyme may join in a recombinant molecule because
(A) the eukaryotic DNA and plasmid DNA will have the same sequence
(B) the eukaryotic DNA and plasmid DNA will have complementary sequences
(C) the plasmid DNA can join with any eukaryotic DNA, regardless of sequence
(D) the plasmid DNA and the eukaryotic DNA cannot join together due to differences in the structure of their DNA molecules
(E) both (B) and (C)

7. Which of the following statements is NOT true of restriction enzymes?
(A) Restriction enzymes protect their bacterial host against intruding foreign DNA from viruses or other bacterial cells
(B) Most restriction enzymes are named after the bacterial organism from which they were first isolated
(C) Each restriction enzyme recognizes a specific sequence of bases on the DNA molecule
(D) Each restriction enzyme cuts at random locations along the DNA molecule
(E) all are correct

8. The uptake of naked DNA from solution by bacterial cells is known as
(A) transcription
(B) electroporation
(C) transduction
(D) translation
(E) transformation

9. The classification of organisms into kingdoms has come under debate in recent years, with most of the debate focused on the
(A) algae and fungi
(B) prokaryotes and simple eukaryotes
(C) algae and plants
(D) fungi and plants
(E) none of these

10. In the steps leading up to the origin of life on earth, early protobionts could not have evolved into living cells without both
(A) competition for resources and the development of hereditary mechanisms
(B) a semipermeable membrane and a nucleus
(C) a semipermeable membrane and the ability to catalyze chemical reactions
(D) a nucleus and the ability to catalyze chemical reactions
(E) both (A) and (D)

1. A
2. B
3. D
4. E
5. C
6. B
7. D
8. E
9. B
10. A