BMSAT Calibration Test

1 /10

The \(n^{th}\) term of a sequence is 2n – 5.

Which is the the correct answer for this sequence?

term-to-term rule: subtract 5

term which has a value of 17: \(11^{th}\)

term-to-term rule: subtract 5

term which has a value of 17: \(29^{th}\)

term-to-term rule: subtract 2

term which has a value of 17: \(11^{th}\)

term-to-term rule: subtract 2

term which has a value of 17: \(29^{th}\)

term-to-term rule: add 2

term which has a value of 17: \(11^{th}\)

term-to-term rule: subtract 5

term which has a value of 17: \(11^{th}\)
term-to-term rule: subtract 5

term which has a value of 17: \(29^{th}\)
term-to-term rule: subtract 2

term which has a value of 17: \(11^{th}\)
term-to-term rule: subtract 2

term which has a value of 17: \(29^{th}\)
term-to-term rule: add 2

term which has a value of 17: \(11^{th}\)

2 /10

A fair spinner has eight equal sections.

Each section has one number written on it, as shown.

What is the probability that the sum of the two numbers is 5?

\(\frac{1}{8}\)

\(\frac{5}{8}\)

\(\frac{1}{16}\)

\(\frac{3}{16}\)

\(\frac{25}{64}\)

\(\frac{1}{8}\)
\(\frac{5}{8}\)
\(\frac{1}{16}\)
\(\frac{3}{16}\)
\(\frac{25}{64}\)

3 /10

The graphs represent the changes in the mass of a healthy human body cell and in the mass of the DNA of that cell over time.

Using the graph, which of the following statements is/are correct?

Mitosis takes place at 12 and 36 hours.

The graph shows two cell divisions.

The next cell division should take place at 72 hours

2 only

1 only

2 and 3 only

1, 2 and 3

1 and 2 only

2 only
1 only
2 and 3 only
1, 2 and 3
1 and 2 only

4 /10

Identify two methods that "drop down" from the general list, and write down the numbers under which they are indicated in the table.

All but two of the methods listed below are referred to as methods of biotechnology.

1) Creation of genetically engineered structures.

2) Study of pedigree pedigree dogs.

3) Conducting a polymerase chain reaction.

4) Hybridization of cells in culture.

5) Assessment of ecosystem biodiversity.

1,2

2,3

1,4

2,5

4,5

5 /10

What percentage of the biomass in the producer is transferred into the biomass of each individual secondary consumer, in this food chain?

0.025

0.0625

0.1

1.25

5.0

0.025
0.0625
0.1
1.25
5.0

6 /10

DNA

Which statements about DNA are true?

1. DNA consists of a sugar-phosphate backbone containing ribose

2. Substitutions in a specific base always leads to harmful mutations

3. Covalent bonds exist between base pairs in DNA

4. DNA is always encapsulated inside a nucleus, in all organisms

1 only

4 only

1 and 3

2 and 3

None of the above

1 only
4 only
1 and 3
2 and 3
None of the above

7 /10

The compounds BrCl and BrI melt at –66 °C and 42 °C, respectively.

What is the best explanation for this difference in melting points?

The Br−I covalent bond is stronger than the Br−Cl covalent bond.

Chlorine is more reactive than iodine so chlorine breaks away from bromine more readily than iodine.

The forces between BrI molecules are stronger than the forces between BrCl molecules.

iodide ions are larger than chloride ions so bromide ions form stronger ionic bonds with iodide ions than with chloride ions.

iodine atoms are larger than chlorine atoms so the BrI giant covalent lattice is more difficult to break up than the BrCl giant covalent lattice.

The Br−I covalent bond is stronger than the Br−Cl covalent bond.
Chlorine is more reactive than iodine so chlorine breaks away from bromine more readily than iodine.
The forces between BrI molecules are stronger than the forces between BrCl molecules.
iodide ions are larger than chloride ions so bromide ions form stronger ionic bonds with iodide ions than with chloride ions.
iodine atoms are larger than chlorine atoms so the BrI giant covalent lattice is more difficult to break up than the BrCl giant covalent lattice.

8 /10

The concentration of Fe²⁺ ions in a solution can be determined by titration with acidifed potassium manganate (VII) solution. The ionic equation for the reaction is:

A 25.0 cm³ sample of solution containing Fe²⁺ ions reacted exactly with 10.0 cm³ of 0.0500 mol dm^-3potassium manganate (VII) solution. What is the concentration of Fe²⁺, in mol dm^-3?

1.00 ×10^-4 mol dm^-3

4.00 ×10^-3 mol dm^-3

1.25 ×10^-4 mol dm^-3

2.00 ×10^-4 mol dm^-3

1.00 ×10^-1 mol dm^-3

1.00 ×10^-4 mol dm^-3
4.00 ×10^-3 mol dm^-3
1.25 ×10^-4 mol dm^-3
2.00 ×10^-4 mol dm^-3
1.00 ×10^-1 mol dm^-3

9 /10

Ellie buys a new toaster. It has a 4000 C charge flowing through it in 100 seconds. This new toaster also has a power of 4.6 kW.

Ellie buys a new toaster. It has a 4000 C charge flowing through it in 100 seconds. This new toaster also has a power of 4.6 kW. What is the resistance provided by this toaster?

0.288 \(\Omega\)

2.88\(\Omega\)

3.14\(\Omega\)

288\(\Omega\)

314\(\Omega\)

0.288 \(\Omega\)
2.88\(\Omega\)
3.14\(\Omega\)
288\(\Omega\)
314\(\Omega\)

10 /10

1) Placing an ammeter around the component under investigation will allow elucidation of the current flowing through it.

2) Current and voltage exhibit a non-linear relationship through a diode, due to symmetrical resistance of the diode.

3) A decrease in temperature increases the flow of current at a given potential difference in a filament lamp.

Which of the following statement(s) regarding current flow in a circuit is/are true?

Only 1

Only 2

Only 3

1 and 3

2 and 3

Only 1
Only 2
Only 3
1 and 3
2 and 3