SAT Biology Practice Test Questions

Biology Practice Test

The SAT (Scholastic Aptitude Test) is the most widely used college admission test.
Streams

• Biology Ecological (Biology-E): Leans more toward biological communities, populations and energy flow
• Biology Molecular (Biology-M): Geared toward biochemistry, cellular structure and processes, such as respiration and photosynthesis.

Exam Pattern

• Questions: 80 Multiple Choice Questions. 60 of the 80 questions are common to both Biology E and M, followed by 20 specialized questions for each section.
• Points: 200–800
• Minutes: 60

Choose the best answer from the five options given below. When you've finished answering as many of the questions as you can, scroll down to the bottom of the page and check your answers by clicking 'Score'. Percentage score will be displayed along with right answers

1. The hydrogen bonds in water are a result of
the hydrogen of a water molecule bonding to the nitrogen of another.
the oxygen of one molecule bonding to one of the hydrogens of that molecule.
the hydrogen of a water molecule bonding to the nitrogen of another.
the hydrogen of one molecule bonding to the oxygen of another molecule.
none of the above.
2. The flowing cytoplasm of an active amoeba is
propelled by microfilaments for lipid synthesis.
an adaptation for extracellular digestion.
composed of microtubules and extracellular matrix.
required for nerve transmission.
dependent on microfilaments for intracellular circulation.
3. All of the following ideas are essential to Charles Darwin’s theory of natural selection except
individuals tend to produce more offspring than can survive.
variation is present in all populations
those individuals who produce the most fertile offspring are the most fit.
resources are usually limited.
characteristics acquired by one parent can be passed on to their offspring.
4. Which of the following statements about mitochondria is (are) true?
Mitochondria exist in all prokaryotes.
Mitochondria exist in bacteria and plants.
Mitochondria exist in animals, plants, and fungi.
Mitochondria exist in animals, plants and fungi
All of the above
5. Consider a solution whose pH has a value of 4. Choose the correct statement from the following:
It has a hydroxide ion concentration of1×10-10.
It has a hydrogen ion concentration of 1×10-4.
It is acidic in nature.
It contains a thousand times morehydrogen ions than a neutral solution.
All of the above are true.
6. What are the number of different types of gametes that can be produced by an organism whose genotype is AaBbCcDd?
4
8
12
16
20
7. The secondary structure of proteins whose conformation may be an alpha helix is due to
the hydrogen bonds between variable groups.
the hydrogen bonds between a carbonyl group of one amino acid and the amino group of another.
the interactions between hydrophobic and hydrophilic variable groups
the interactions between the positively and negatively charged variable groups.
all of the above.
8. The plasmids were separated according to
their size
their charge
their A-T:G-C composition
their size and their charge
all of the above
9. A student cut a 2cm3 block out of a potato and massed the block. She then placed the block in distilled water and waited an hour. If she remassed the block she could expect which of the following?
the mass to increase due to plasmolysis
the mass to decrease because the potato will loose its water
the mass to increase because the potato is hypertonic to the water
the mass to decrease because of the higher water potential in the potato
the mass to remain the same because there are no living components in this system
10. One can find naturally occurring plasmids in
viruses
people
bacteria
algae
all of the above.
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