Nitrogen gas is an extremely stable molecule because its structure contains which of the following?

A. Resonance bonds

B. Ionic bonds

C. Triple covalent bonds

D. Hydrogen bonds

Answer Explanation:

The Lewis structure of nitrogen gas is shown below. Triple bonds are stronger than double or single bonds. Therefore, we can infer that the triple bond between the two nitrogen atoms makes nitrogen gas more stable.

Therefore, the Correct Answer is C.

Q #1: Which of the following indicates the function of sodium bicarbonate released by the pancreas?

A. Sodium bicarbonate inhibits peristalsis

B. Sodium bicarbonate is a protease that digests carbohydrates

C. Sodium bicarbonate stimulates the pyloric sphincter

D. Sodium bicarbonate neutralizes the acidity of chyme

Answer Explanation

Sodium bicarbonate is an alkaline solution, which is released by the pancreas. Chyme is acidic coming from the stomach is neutralized by sodium bicarbonate to protect the duodenum.
Q #2: Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

A. Filtration

B. Titration

C. Electrophoresis

D. Spectrophotometry

Answer Explanation

Electrophoresis is a lab method that is commonly used to separate charge molecules based on their size. Some of the charged molecules include DNA, RNA, and proteins.
Q #3: In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

A. Ff x ff

B. Ff x Ff

C. FF x FF

D. ff x ff

Answer Explanation

Crossing is the breeding of parents to produce an offspring. Given that f is a recessive allele of smooth leaves while F is the dominant allele of fuzzy leaves. Therefore, where there is F crossing with f, the offspring will have fuzzy leaves over smooth one.
Therefore, for an offspring to have smooth leaves, ff and ff must cross to produce an offspring with smooth leaves.

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Nitrogen gas is an extremely stable molecule because its structure contains which of the following?

More Questions on TEAS 7 Science

Q #1: Which of the following indicates the function of sodium bicarbonate released by the pancreas?

Answer Explanation

Q #2: Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

Answer Explanation

Q #3: In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

Answer Explanation

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